diff --git a/stockmind/ai/__init__.py b/stockmind/ai/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/stockmind/ai/claude_client.py b/stockmind/ai/claude_client.py
new file mode 100644
index 0000000..d61e5a2
--- /dev/null
+++ b/stockmind/ai/claude_client.py
@@ -0,0 +1,50 @@
+from __future__ import annotations
+import anthropic
+
+
+INPUT_COST_PER_1M = 3.0   # claude-sonnet-4-6 $/1M tokens
+OUTPUT_COST_PER_1M = 15.0
+
+
+class ClaudeClient:
+    MODEL = "claude-sonnet-4-6"
+
+    def __init__(self, api_key: str):
+        self._client = anthropic.Anthropic(api_key=api_key)
+
+    def ask(
+        self,
+        prompt: str,
+        system: str = "",
+        max_tokens: int = 1024,
+    ) -> tuple[str, dict]:
+        messages = [{"role": "user", "content": prompt}]
+        kwargs = {"model": self.MODEL, "max_tokens": max_tokens, "messages": messages}
+        if system:
+            kwargs["system"] = system
+
+        response = self._client.messages.create(**kwargs)
+        text = response.content[0].text if response.content else ""
+        usage = {
+            "input_tokens": response.usage.input_tokens,
+            "output_tokens": response.usage.output_tokens,
+            "cost_usd": self._estimate_cost(response.usage.input_tokens, response.usage.output_tokens),
+        }
+        return text, usage
+
+    def stream_ask(self, prompt: str, system: str = "", max_tokens: int = 1024):
+        messages = [{"role": "user", "content": prompt}]
+        kwargs = {"model": self.MODEL, "max_tokens": max_tokens, "messages": messages}
+        if system:
+            kwargs["system"] = system
+
+        with self._client.messages.stream(**kwargs) as stream:
+            for text in stream.text_stream:
+                yield text
+
+    def _estimate_cost(self, input_tokens: int, output_tokens: int) -> float:
+        return (input_tokens / 1_000_000 * INPUT_COST_PER_1M) + (output_tokens / 1_000_000 * OUTPUT_COST_PER_1M)
+
+    @staticmethod
+    def estimate_tokens(text: str) -> int:
+        return max(1, len(text) // 4)
diff --git a/stockmind/ai/prompts.py b/stockmind/ai/prompts.py
new file mode 100644
index 0000000..672dc39
--- /dev/null
+++ b/stockmind/ai/prompts.py
@@ -0,0 +1,94 @@
+STOCK_SUMMARY_SYSTEM = "You are a professional equity analyst. Be concise, factual, and avoid hype."
+
+STOCK_SUMMARY_PROMPT = """
+Ticker: {symbol}
+Company: {name}
+Sector: {sector}
+Industry: {industry}
+Market Cap: {market_cap}
+P/E Ratio: {pe_ratio}
+EPS: {eps}
+52W High: {week_52_high} | 52W Low: {week_52_low}
+Dividend Yield: {dividend_yield}
+
+Recent News Headlines:
+{headlines}
+
+Write a concise 3-paragraph stock summary:
+1. Business overview and recent performance
+2. Key financial metrics analysis
+3. Near-term catalysts and risks
+"""
+
+TECHNICAL_READ_SYSTEM = "You are a technical analyst specializing in chart pattern recognition."
+
+TECHNICAL_READ_PROMPT = """
+Ticker: {symbol}
+Period Analyzed: {period}
+Current Price: {price}
+SMA20: {sma20} | SMA50: {sma50}
+RSI(14): {rsi}
+MACD: {macd} | Signal: {macd_signal}
+Bollinger Bands: Upper {bb_upper} | Lower {bb_lower}
+Recent price action: {price_action}
+
+Provide a technical analysis in 2-3 paragraphs covering:
+1. Current trend, key support/resistance levels
+2. Indicator readings and what they signal
+3. Actionable technical outlook (bullish/bearish/neutral)
+"""
+
+SENTIMENT_SCORE_SYSTEM = "You are a financial sentiment analyst. Classify sentiment precisely."
+
+SENTIMENT_SCORE_PROMPT = """
+Ticker: {symbol}
+Analyze the sentiment of these news headlines:
+
+{headlines}
+
+Respond in this exact format:
+OVERALL: [BULLISH/BEARISH/NEUTRAL]
+SCORE: [0-100 where 0=extreme bearish, 50=neutral, 100=extreme bullish]
+REASONING: [2-3 sentences explaining the dominant themes]
+HEADLINE_BREAKDOWN:
+[For each headline: + or - or ~ and one line explanation]
+"""
+
+PRICE_OUTLOOK_SYSTEM = "You are a quantitative strategist. Base your outlook on data, not speculation."
+
+PRICE_OUTLOOK_PROMPT = """
+Ticker: {symbol}
+Current Price: {price}
+Technical snapshot: RSI={rsi}, trend={trend}, momentum={momentum}
+Recent news sentiment: {sentiment}
+Sector performance: {sector_perf}
+
+Provide a short-term price outlook in this format:
+1-DAY BIAS: [BULLISH/BEARISH/NEUTRAL] — [confidence %] — [one-line rationale]
+1-WEEK BIAS: [BULLISH/BEARISH/NEUTRAL] — [confidence %] — [one-line rationale]
+1-MONTH BIAS: [BULLISH/BEARISH/NEUTRAL] — [confidence %] — [one-line rationale]
+KEY RISKS: [2 bullet points]
+"""
+
+PORTFOLIO_REVIEW_SYSTEM = "You are a portfolio risk manager. Identify risks clearly and suggest actionable improvements."
+
+PORTFOLIO_REVIEW_PROMPT = """
+Portfolio Holdings:
+{holdings}
+
+Total Value: {total_value}
+Cash Position: {cash}
+Largest Position: {top_position}
+Sector Allocation: {sector_allocation}
+
+Provide a portfolio review covering:
+1. Concentration risk (any position > 20% or sector > 40%)
+2. Correlation risk (holdings that move together)
+3. Missing diversification (sectors, asset classes)
+4. Top 3 actionable recommendations
+"""
+
+CHAT_SYSTEM = """You are StockMind AI, an expert financial assistant integrated into a stock market application.
+You have access to real-time market context provided by the user. Answer questions about stocks, crypto,
+market trends, investment strategies, and financial analysis. Be concise and professional.
+Always note that your analysis is for informational purposes only and not financial advice."""
diff --git a/stockmind/ai/sentiment.py b/stockmind/ai/sentiment.py
new file mode 100644
index 0000000..b93efad
--- /dev/null
+++ b/stockmind/ai/sentiment.py
@@ -0,0 +1,93 @@
+from __future__ import annotations
+from datetime import datetime, timedelta
+from newsapi import NewsApiClient
+from ai.claude_client import ClaudeClient
+from ai.prompts import SENTIMENT_SCORE_SYSTEM, SENTIMENT_SCORE_PROMPT
+
+
+def fetch_news(symbol: str, api_key: str, page_size: int = 10) -> list[dict]:
+    try:
+        client = NewsApiClient(api_key=api_key)
+        from_date = (datetime.now() - timedelta(days=7)).strftime("%Y-%m-%d")
+        response = client.get_everything(
+            q=symbol,
+            language="en",
+            sort_by="publishedAt",
+            page_size=page_size,
+            from_param=from_date,
+        )
+        articles = response.get("articles", [])
+        return [
+            {
+                "title": a.get("title", ""),
+                "description": a.get("description", ""),
+                "url": a.get("url", ""),
+                "source": a.get("source", {}).get("name", ""),
+                "published_at": a.get("publishedAt", ""),
+            }
+            for a in articles
+            if a.get("title")
+        ]
+    except Exception as e:
+        return []
+
+
+def analyze_sentiment(symbol: str, articles: list[dict], claude: ClaudeClient) -> tuple[str, dict]:
+    if not articles:
+        return "No news available for sentiment analysis.", {}
+
+    headlines = "\n".join(
+        f"{i + 1}. {a['title']}" for i, a in enumerate(articles[:15])
+    )
+    prompt = SENTIMENT_SCORE_PROMPT.format(symbol=symbol, headlines=headlines)
+    text, usage = claude.ask(prompt, system=SENTIMENT_SCORE_SYSTEM, max_tokens=800)
+    return text, usage
+
+
+def cache_news(symbol: str, articles: list[dict], sentiment: str = "") -> None:
+    from db.database import get_session
+    from db.models import NewsCache
+    from datetime import datetime
+
+    with get_session() as session:
+        session.query(NewsCache).filter_by(symbol=symbol).delete()
+        for a in articles:
+            session.add(NewsCache(
+                symbol=symbol,
+                title=a.get("title", ""),
+                description=a.get("description", ""),
+                url=a.get("url", ""),
+                source=a.get("source", ""),
+                published_at=a.get("published_at", ""),
+                sentiment=sentiment,
+                fetched_at=datetime.utcnow(),
+            ))
+        session.commit()
+
+
+def get_cached_news(symbol: str, max_age_hours: int = 1) -> list[dict] | None:
+    from db.database import get_session
+    from db.models import NewsCache
+    from datetime import datetime, timedelta
+
+    cutoff = datetime.utcnow() - timedelta(hours=max_age_hours)
+    with get_session() as session:
+        rows = (
+            session.query(NewsCache)
+            .filter(NewsCache.symbol == symbol, NewsCache.fetched_at > cutoff)
+            .order_by(NewsCache.published_at.desc())
+            .all()
+        )
+        if not rows:
+            return None
+        return [
+            {
+                "title": r.title,
+                "description": r.description,
+                "url": r.url,
+                "source": r.source,
+                "published_at": r.published_at,
+                "sentiment": r.sentiment,
+            }
+            for r in rows
+        ]
diff --git a/stockmind/assets/styles/dark.qss b/stockmind/assets/styles/dark.qss
new file mode 100644
index 0000000..a931213
--- /dev/null
+++ b/stockmind/assets/styles/dark.qss
@@ -0,0 +1,364 @@
+/* ─── StockMind Dark Theme ─── */
+* {
+    font-family: "Segoe UI", "Arial", sans-serif;
+    font-size: 10pt;
+    color: #cdd6f4;
+}
+
+QMainWindow, QWidget {
+    background-color: #1e1e2e;
+}
+
+/* ─── Sidebar ─── */
+#sidebar {
+    background-color: #181825;
+    border-right: 1px solid #313244;
+    min-width: 56px;
+    max-width: 56px;
+}
+
+#sidebar QPushButton {
+    background-color: transparent;
+    border: none;
+    border-radius: 8px;
+    padding: 10px;
+    margin: 2px 6px;
+    color: #6c7086;
+    font-size: 9pt;
+    text-align: center;
+}
+
+#sidebar QPushButton:hover {
+    background-color: #313244;
+    color: #cdd6f4;
+}
+
+#sidebar QPushButton:checked, #sidebar QPushButton[active="true"] {
+    background-color: #89b4fa;
+    color: #1e1e2e;
+}
+
+#logo_label {
+    color: #89b4fa;
+    font-size: 13pt;
+    font-weight: bold;
+    padding: 12px 0;
+}
+
+/* ─── Frames / Cards ─── */
+QFrame#card {
+    background-color: #24273a;
+    border: 1px solid #313244;
+    border-radius: 10px;
+    padding: 8px;
+}
+
+/* ─── Labels ─── */
+QLabel {
+    background-color: transparent;
+}
+
+QLabel#title {
+    font-size: 15pt;
+    font-weight: bold;
+    color: #cdd6f4;
+}
+
+QLabel#subtitle {
+    font-size: 9pt;
+    color: #6c7086;
+}
+
+QLabel#price_label {
+    font-size: 22pt;
+    font-weight: bold;
+    color: #cdd6f4;
+}
+
+QLabel.positive { color: #a6e3a1; }
+QLabel.negative { color: #f38ba8; }
+
+/* ─── Buttons ─── */
+QPushButton {
+    background-color: #313244;
+    color: #cdd6f4;
+    border: 1px solid #45475a;
+    border-radius: 6px;
+    padding: 6px 14px;
+    font-size: 9pt;
+}
+
+QPushButton:hover {
+    background-color: #45475a;
+    border-color: #585b70;
+}
+
+QPushButton:pressed {
+    background-color: #585b70;
+}
+
+QPushButton#primary_btn {
+    background-color: #89b4fa;
+    color: #1e1e2e;
+    border: none;
+    font-weight: bold;
+}
+
+QPushButton#primary_btn:hover {
+    background-color: #b4befe;
+}
+
+QPushButton#danger_btn {
+    background-color: #f38ba8;
+    color: #1e1e2e;
+    border: none;
+}
+
+QPushButton#danger_btn:hover {
+    background-color: #f2c4d0;
+}
+
+QPushButton:disabled {
+    background-color: #1e1e2e;
+    color: #45475a;
+    border-color: #313244;
+}
+
+/* ─── Inputs ─── */
+QLineEdit, QSpinBox, QDoubleSpinBox, QComboBox {
+    background-color: #181825;
+    border: 1px solid #313244;
+    border-radius: 6px;
+    padding: 5px 8px;
+    color: #cdd6f4;
+    selection-background-color: #89b4fa;
+    selection-color: #1e1e2e;
+}
+
+QLineEdit:focus, QSpinBox:focus, QDoubleSpinBox:focus, QComboBox:focus {
+    border-color: #89b4fa;
+}
+
+QComboBox::drop-down {
+    border: none;
+    width: 20px;
+}
+
+QComboBox::down-arrow {
+    width: 10px;
+    height: 10px;
+}
+
+QComboBox QAbstractItemView {
+    background-color: #24273a;
+    border: 1px solid #313244;
+    border-radius: 6px;
+    selection-background-color: #313244;
+}
+
+/* ─── Tables ─── */
+QTableWidget, QTableView {
+    background-color: #1e1e2e;
+    alternate-background-color: #24273a;
+    border: none;
+    gridline-color: #313244;
+    selection-background-color: #313244;
+    selection-color: #cdd6f4;
+}
+
+QTableWidget::item, QTableView::item {
+    padding: 4px 8px;
+    border: none;
+}
+
+QTableWidget::item:selected, QTableView::item:selected {
+    background-color: #313244;
+}
+
+QHeaderView::section {
+    background-color: #181825;
+    color: #6c7086;
+    border: none;
+    border-bottom: 1px solid #313244;
+    padding: 6px 8px;
+    font-size: 9pt;
+    font-weight: bold;
+    text-transform: uppercase;
+}
+
+/* ─── Scrollbars ─── */
+QScrollBar:vertical {
+    background: transparent;
+    width: 8px;
+    border-radius: 4px;
+}
+
+QScrollBar::handle:vertical {
+    background-color: #45475a;
+    border-radius: 4px;
+    min-height: 30px;
+}
+
+QScrollBar::handle:vertical:hover {
+    background-color: #585b70;
+}
+
+QScrollBar::add-line:vertical, QScrollBar::sub-line:vertical { height: 0; }
+QScrollBar::add-page:vertical, QScrollBar::sub-page:vertical { background: transparent; }
+
+QScrollBar:horizontal {
+    background: transparent;
+    height: 8px;
+    border-radius: 4px;
+}
+
+QScrollBar::handle:horizontal {
+    background-color: #45475a;
+    border-radius: 4px;
+    min-width: 30px;
+}
+
+QScrollBar::handle:horizontal:hover { background-color: #585b70; }
+QScrollBar::add-line:horizontal, QScrollBar::sub-line:horizontal { width: 0; }
+
+/* ─── Tabs ─── */
+QTabWidget::pane {
+    border: 1px solid #313244;
+    border-radius: 8px;
+    background-color: #1e1e2e;
+}
+
+QTabBar::tab {
+    background-color: #24273a;
+    color: #6c7086;
+    border: none;
+    padding: 8px 16px;
+    border-radius: 6px 6px 0 0;
+    margin-right: 2px;
+}
+
+QTabBar::tab:selected {
+    background-color: #313244;
+    color: #cdd6f4;
+}
+
+QTabBar::tab:hover {
+    background-color: #313244;
+    color: #cdd6f4;
+}
+
+/* ─── Text Edit ─── */
+QTextEdit, QPlainTextEdit {
+    background-color: #181825;
+    border: 1px solid #313244;
+    border-radius: 6px;
+    color: #cdd6f4;
+    selection-background-color: #89b4fa;
+    selection-color: #1e1e2e;
+    padding: 4px;
+}
+
+/* ─── Checkboxes ─── */
+QCheckBox {
+    spacing: 6px;
+    color: #cdd6f4;
+}
+
+QCheckBox::indicator {
+    width: 16px;
+    height: 16px;
+    border: 2px solid #45475a;
+    border-radius: 4px;
+    background: transparent;
+}
+
+QCheckBox::indicator:checked {
+    background-color: #89b4fa;
+    border-color: #89b4fa;
+}
+
+/* ─── Splitter ─── */
+QSplitter::handle {
+    background-color: #313244;
+}
+
+QSplitter::handle:horizontal { width: 2px; }
+QSplitter::handle:vertical { height: 2px; }
+
+/* ─── Status Bar ─── */
+QStatusBar {
+    background-color: #181825;
+    border-top: 1px solid #313244;
+    color: #6c7086;
+    font-size: 8pt;
+}
+
+/* ─── Tooltips ─── */
+QToolTip {
+    background-color: #24273a;
+    color: #cdd6f4;
+    border: 1px solid #313244;
+    border-radius: 6px;
+    padding: 4px 8px;
+    font-size: 9pt;
+}
+
+/* ─── Group Box ─── */
+QGroupBox {
+    border: 1px solid #313244;
+    border-radius: 8px;
+    margin-top: 12px;
+    padding-top: 8px;
+    font-size: 9pt;
+    color: #6c7086;
+}
+
+QGroupBox::title {
+    subcontrol-origin: margin;
+    left: 10px;
+    padding: 0 4px;
+    color: #89b4fa;
+}
+
+/* ─── List Widget ─── */
+QListWidget {
+    background-color: #1e1e2e;
+    border: none;
+    alternate-background-color: #24273a;
+    outline: none;
+}
+
+QListWidget::item {
+    padding: 6px 10px;
+    border-radius: 4px;
+    margin: 1px 4px;
+}
+
+QListWidget::item:selected {
+    background-color: #313244;
+    color: #cdd6f4;
+}
+
+QListWidget::item:hover {
+    background-color: #24273a;
+}
+
+/* ─── Progress Bar ─── */
+QProgressBar {
+    background-color: #313244;
+    border: none;
+    border-radius: 4px;
+    height: 6px;
+    text-align: center;
+    color: transparent;
+}
+
+QProgressBar::chunk {
+    background-color: #89b4fa;
+    border-radius: 4px;
+}
+
+/* ─── Dialog ─── */
+QDialog {
+    background-color: #1e1e2e;
+}
diff --git a/stockmind/assets/styles/light.qss b/stockmind/assets/styles/light.qss
new file mode 100644
index 0000000..9e4a9c1
--- /dev/null
+++ b/stockmind/assets/styles/light.qss
@@ -0,0 +1,332 @@
+/* ─── StockMind Light Theme ─── */
+* {
+    font-family: "Segoe UI", "Arial", sans-serif;
+    font-size: 10pt;
+    color: #4c4f69;
+}
+
+QMainWindow, QWidget {
+    background-color: #eff1f5;
+}
+
+/* ─── Sidebar ─── */
+#sidebar {
+    background-color: #e6e9ef;
+    border-right: 1px solid #ccd0da;
+    min-width: 56px;
+    max-width: 56px;
+}
+
+#sidebar QPushButton {
+    background-color: transparent;
+    border: none;
+    border-radius: 8px;
+    padding: 10px;
+    margin: 2px 6px;
+    color: #9ca0b0;
+    font-size: 9pt;
+    text-align: center;
+}
+
+#sidebar QPushButton:hover {
+    background-color: #ccd0da;
+    color: #4c4f69;
+}
+
+#sidebar QPushButton:checked, #sidebar QPushButton[active="true"] {
+    background-color: #1e66f5;
+    color: #ffffff;
+}
+
+#logo_label {
+    color: #1e66f5;
+    font-size: 13pt;
+    font-weight: bold;
+    padding: 12px 0;
+}
+
+/* ─── Frames / Cards ─── */
+QFrame#card {
+    background-color: #ffffff;
+    border: 1px solid #ccd0da;
+    border-radius: 10px;
+    padding: 8px;
+}
+
+/* ─── Labels ─── */
+QLabel {
+    background-color: transparent;
+}
+
+QLabel#title {
+    font-size: 15pt;
+    font-weight: bold;
+    color: #4c4f69;
+}
+
+QLabel#subtitle {
+    font-size: 9pt;
+    color: #9ca0b0;
+}
+
+QLabel#price_label {
+    font-size: 22pt;
+    font-weight: bold;
+    color: #4c4f69;
+}
+
+QLabel.positive { color: #40a02b; }
+QLabel.negative { color: #d20f39; }
+
+/* ─── Buttons ─── */
+QPushButton {
+    background-color: #e6e9ef;
+    color: #4c4f69;
+    border: 1px solid #ccd0da;
+    border-radius: 6px;
+    padding: 6px 14px;
+    font-size: 9pt;
+}
+
+QPushButton:hover {
+    background-color: #ccd0da;
+    border-color: #bcc0cc;
+}
+
+QPushButton:pressed {
+    background-color: #bcc0cc;
+}
+
+QPushButton#primary_btn {
+    background-color: #1e66f5;
+    color: #ffffff;
+    border: none;
+    font-weight: bold;
+}
+
+QPushButton#primary_btn:hover {
+    background-color: #2d75ff;
+}
+
+QPushButton#danger_btn {
+    background-color: #d20f39;
+    color: #ffffff;
+    border: none;
+}
+
+QPushButton#danger_btn:hover {
+    background-color: #e0204a;
+}
+
+QPushButton:disabled {
+    background-color: #eff1f5;
+    color: #bcc0cc;
+    border-color: #ccd0da;
+}
+
+/* ─── Inputs ─── */
+QLineEdit, QSpinBox, QDoubleSpinBox, QComboBox {
+    background-color: #ffffff;
+    border: 1px solid #ccd0da;
+    border-radius: 6px;
+    padding: 5px 8px;
+    color: #4c4f69;
+    selection-background-color: #1e66f5;
+    selection-color: #ffffff;
+}
+
+QLineEdit:focus, QSpinBox:focus, QDoubleSpinBox:focus, QComboBox:focus {
+    border-color: #1e66f5;
+}
+
+QComboBox::drop-down { border: none; width: 20px; }
+QComboBox QAbstractItemView {
+    background-color: #ffffff;
+    border: 1px solid #ccd0da;
+    border-radius: 6px;
+    selection-background-color: #e6e9ef;
+    color: #4c4f69;
+}
+
+/* ─── Tables ─── */
+QTableWidget, QTableView {
+    background-color: #ffffff;
+    alternate-background-color: #f5f5fa;
+    border: none;
+    gridline-color: #e6e9ef;
+    selection-background-color: #e6e9ef;
+    selection-color: #4c4f69;
+}
+
+QTableWidget::item, QTableView::item {
+    padding: 4px 8px;
+    border: none;
+}
+
+QHeaderView::section {
+    background-color: #e6e9ef;
+    color: #9ca0b0;
+    border: none;
+    border-bottom: 1px solid #ccd0da;
+    padding: 6px 8px;
+    font-size: 9pt;
+    font-weight: bold;
+    text-transform: uppercase;
+}
+
+/* ─── Scrollbars ─── */
+QScrollBar:vertical {
+    background: transparent;
+    width: 8px;
+    border-radius: 4px;
+}
+QScrollBar::handle:vertical {
+    background-color: #ccd0da;
+    border-radius: 4px;
+    min-height: 30px;
+}
+QScrollBar::handle:vertical:hover { background-color: #bcc0cc; }
+QScrollBar::add-line:vertical, QScrollBar::sub-line:vertical { height: 0; }
+QScrollBar::add-page:vertical, QScrollBar::sub-page:vertical { background: transparent; }
+
+QScrollBar:horizontal {
+    background: transparent;
+    height: 8px;
+    border-radius: 4px;
+}
+QScrollBar::handle:horizontal {
+    background-color: #ccd0da;
+    border-radius: 4px;
+    min-width: 30px;
+}
+QScrollBar::handle:horizontal:hover { background-color: #bcc0cc; }
+QScrollBar::add-line:horizontal, QScrollBar::sub-line:horizontal { width: 0; }
+
+/* ─── Tabs ─── */
+QTabWidget::pane {
+    border: 1px solid #ccd0da;
+    border-radius: 8px;
+    background-color: #ffffff;
+}
+
+QTabBar::tab {
+    background-color: #e6e9ef;
+    color: #9ca0b0;
+    border: none;
+    padding: 8px 16px;
+    border-radius: 6px 6px 0 0;
+    margin-right: 2px;
+}
+
+QTabBar::tab:selected {
+    background-color: #ffffff;
+    color: #4c4f69;
+}
+
+QTabBar::tab:hover {
+    background-color: #dce0e8;
+    color: #4c4f69;
+}
+
+/* ─── Text Edit ─── */
+QTextEdit, QPlainTextEdit {
+    background-color: #ffffff;
+    border: 1px solid #ccd0da;
+    border-radius: 6px;
+    color: #4c4f69;
+    selection-background-color: #1e66f5;
+    selection-color: #ffffff;
+    padding: 4px;
+}
+
+/* ─── Checkboxes ─── */
+QCheckBox {
+    spacing: 6px;
+    color: #4c4f69;
+}
+QCheckBox::indicator {
+    width: 16px;
+    height: 16px;
+    border: 2px solid #ccd0da;
+    border-radius: 4px;
+    background: white;
+}
+QCheckBox::indicator:checked {
+    background-color: #1e66f5;
+    border-color: #1e66f5;
+}
+
+/* ─── Splitter ─── */
+QSplitter::handle { background-color: #ccd0da; }
+QSplitter::handle:horizontal { width: 2px; }
+QSplitter::handle:vertical { height: 2px; }
+
+/* ─── Status Bar ─── */
+QStatusBar {
+    background-color: #e6e9ef;
+    border-top: 1px solid #ccd0da;
+    color: #9ca0b0;
+    font-size: 8pt;
+}
+
+/* ─── Tooltips ─── */
+QToolTip {
+    background-color: #ffffff;
+    color: #4c4f69;
+    border: 1px solid #ccd0da;
+    border-radius: 6px;
+    padding: 4px 8px;
+    font-size: 9pt;
+}
+
+/* ─── Group Box ─── */
+QGroupBox {
+    border: 1px solid #ccd0da;
+    border-radius: 8px;
+    margin-top: 12px;
+    padding-top: 8px;
+    font-size: 9pt;
+    color: #9ca0b0;
+}
+QGroupBox::title {
+    subcontrol-origin: margin;
+    left: 10px;
+    padding: 0 4px;
+    color: #1e66f5;
+}
+
+/* ─── List Widget ─── */
+QListWidget {
+    background-color: #ffffff;
+    border: none;
+    alternate-background-color: #f5f5fa;
+    outline: none;
+}
+QListWidget::item {
+    padding: 6px 10px;
+    border-radius: 4px;
+    margin: 1px 4px;
+}
+QListWidget::item:selected {
+    background-color: #e6e9ef;
+    color: #4c4f69;
+}
+QListWidget::item:hover {
+    background-color: #f0f1f7;
+}
+
+/* ─── Progress Bar ─── */
+QProgressBar {
+    background-color: #e6e9ef;
+    border: none;
+    border-radius: 4px;
+    height: 6px;
+    color: transparent;
+}
+QProgressBar::chunk {
+    background-color: #1e66f5;
+    border-radius: 4px;
+}
+
+/* ─── Dialog ─── */
+QDialog { background-color: #eff1f5; }
diff --git a/stockmind/brokers/__init__.py b/stockmind/brokers/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/stockmind/brokers/base_broker.py b/stockmind/brokers/base_broker.py
new file mode 100644
index 0000000..9524aad
--- /dev/null
+++ b/stockmind/brokers/base_broker.py
@@ -0,0 +1,60 @@
+from abc import ABC, abstractmethod
+from dataclasses import dataclass, field
+from typing import Optional
+
+
+@dataclass
+class Position:
+    symbol: str
+    shares: float
+    avg_cost: float
+    market_value: float = 0.0
+    current_price: float = 0.0
+    pnl: float = 0.0
+    pnl_pct: float = 0.0
+    description: str = ""
+
+
+@dataclass
+class AccountBalance:
+    total_equity: float = 0.0
+    cash: float = 0.0
+    buying_power: float = 0.0
+    day_pnl: float = 0.0
+    day_pnl_pct: float = 0.0
+
+
+@dataclass
+class Order:
+    order_id: str
+    symbol: str
+    side: str  # buy / sell
+    quantity: float
+    price: float
+    status: str
+    order_type: str
+    placed_at: str = ""
+
+
+class BaseBroker(ABC):
+    name: str = "base"
+
+    @abstractmethod
+    def connect(self) -> bool:
+        ...
+
+    @abstractmethod
+    def is_connected(self) -> bool:
+        ...
+
+    @abstractmethod
+    def get_positions(self) -> list[Position]:
+        ...
+
+    @abstractmethod
+    def get_balance(self) -> AccountBalance:
+        ...
+
+    @abstractmethod
+    def get_orders(self, limit: int = 25) -> list[Order]:
+        ...
diff --git a/stockmind/brokers/robinhood.py b/stockmind/brokers/robinhood.py
new file mode 100644
index 0000000..016c9af
--- /dev/null
+++ b/stockmind/brokers/robinhood.py
@@ -0,0 +1,98 @@
+from __future__ import annotations
+from brokers.base_broker import BaseBroker, Position, AccountBalance, Order
+
+
+class RobinhoodBroker(BaseBroker):
+    name = "robinhood"
+
+    def __init__(self, username: str, password: str):
+        self._username = username
+        self._password = password
+        self._connected = False
+
+    def connect(self) -> bool:
+        if not self._username or not self._password:
+            return False
+        try:
+            import robin_stocks.robinhood as rh
+            rh.login(self._username, self._password)
+            self._connected = True
+            return True
+        except Exception as e:
+            self._connected = False
+            raise RuntimeError(f"Robinhood login failed: {e}")
+
+    def is_connected(self) -> bool:
+        return self._connected
+
+    def get_positions(self) -> list[Position]:
+        if not self.is_connected():
+            return []
+        try:
+            import robin_stocks.robinhood as rh
+            holdings = rh.account.build_holdings()
+            result = []
+            for symbol, data in holdings.items():
+                shares = float(data.get("quantity", 0))
+                avg_cost = float(data.get("average_buy_price", 0))
+                current_price = float(data.get("price", 0))
+                market_value = shares * current_price
+                cost_basis = shares * avg_cost
+                pnl = market_value - cost_basis
+                pnl_pct = (pnl / cost_basis * 100) if cost_basis else 0
+                result.append(Position(
+                    symbol=symbol,
+                    shares=shares,
+                    avg_cost=avg_cost,
+                    market_value=market_value,
+                    current_price=current_price,
+                    pnl=pnl,
+                    pnl_pct=pnl_pct,
+                    description=data.get("name", ""),
+                ))
+            return result
+        except Exception:
+            return []
+
+    def get_balance(self) -> AccountBalance:
+        if not self.is_connected():
+            return AccountBalance()
+        try:
+            import robin_stocks.robinhood as rh
+            profile = rh.profiles.load_portfolio_profile()
+            return AccountBalance(
+                total_equity=float(profile.get("equity", 0)),
+                cash=float(profile.get("withdrawable_amount", 0)),
+                buying_power=float(profile.get("buying_power", profile.get("withdrawable_amount", 0))),
+                day_pnl=float(profile.get("equity_previous_close", 0)) - float(profile.get("equity", 0)),
+            )
+        except Exception:
+            return AccountBalance()
+
+    def get_orders(self, limit: int = 25) -> list[Order]:
+        if not self.is_connected():
+            return []
+        try:
+            import robin_stocks.robinhood as rh
+            orders = rh.orders.get_all_stock_orders()[:limit]
+            result = []
+            for o in orders:
+                symbol = ""
+                try:
+                    instr = rh.stocks.get_instrument_by_url(o.get("instrument", ""))
+                    symbol = instr.get("symbol", "") if instr else ""
+                except Exception:
+                    pass
+                result.append(Order(
+                    order_id=o.get("id", ""),
+                    symbol=symbol,
+                    side=o.get("side", ""),
+                    quantity=float(o.get("quantity", 0)),
+                    price=float(o.get("price") or o.get("average_price") or 0),
+                    status=o.get("state", ""),
+                    order_type=o.get("type", ""),
+                    placed_at=o.get("created_at", ""),
+                ))
+            return result
+        except Exception:
+            return []
diff --git a/stockmind/brokers/schwab.py b/stockmind/brokers/schwab.py
new file mode 100644
index 0000000..18f62d4
--- /dev/null
+++ b/stockmind/brokers/schwab.py
@@ -0,0 +1,105 @@
+from __future__ import annotations
+from brokers.base_broker import BaseBroker, Position, AccountBalance, Order
+
+
+class SchwabBroker(BaseBroker):
+    name = "schwab"
+
+    def __init__(self, app_key: str, app_secret: str):
+        self._app_key = app_key
+        self._app_secret = app_secret
+        self._client = None
+        self._connected = False
+
+    def connect(self) -> bool:
+        if not self._app_key or not self._app_secret:
+            return False
+        try:
+            import schwabdev
+            self._client = schwabdev.Client(self._app_key, self._app_secret)
+            self._connected = True
+            return True
+        except Exception as e:
+            self._connected = False
+            raise RuntimeError(f"Schwab connection failed: {e}")
+
+    def is_connected(self) -> bool:
+        return self._connected and self._client is not None
+
+    def get_positions(self) -> list[Position]:
+        if not self.is_connected():
+            return []
+        try:
+            response = self._client.account_linked().json()
+            account_hash = response[0].get("hashValue", "")
+            positions_resp = self._client.account(account_hash, fields="positions").json()
+            raw_positions = positions_resp.get("securitiesAccount", {}).get("positions", [])
+            result = []
+            for p in raw_positions:
+                instr = p.get("instrument", {})
+                symbol = instr.get("symbol", "")
+                shares = float(p.get("longQuantity", 0))
+                avg_cost = float(p.get("averagePrice", 0))
+                market_value = float(p.get("marketValue", 0))
+                current_price = market_value / shares if shares else 0
+                cost_basis = avg_cost * shares
+                pnl = market_value - cost_basis
+                pnl_pct = (pnl / cost_basis * 100) if cost_basis else 0
+                result.append(Position(
+                    symbol=symbol,
+                    shares=shares,
+                    avg_cost=avg_cost,
+                    market_value=market_value,
+                    current_price=current_price,
+                    pnl=pnl,
+                    pnl_pct=pnl_pct,
+                    description=instr.get("description", ""),
+                ))
+            return result
+        except Exception:
+            return []
+
+    def get_balance(self) -> AccountBalance:
+        if not self.is_connected():
+            return AccountBalance()
+        try:
+            response = self._client.account_linked().json()
+            account_hash = response[0].get("hashValue", "")
+            acct = self._client.account(account_hash).json()
+            balances = acct.get("securitiesAccount", {}).get("currentBalances", {})
+            return AccountBalance(
+                total_equity=float(balances.get("equity", 0)),
+                cash=float(balances.get("cashBalance", 0)),
+                buying_power=float(balances.get("buyingPower", 0)),
+                day_pnl=float(acct.get("securitiesAccount", {}).get("currentBalances", {}).get("dayProfitLoss", 0)),
+            )
+        except Exception:
+            return AccountBalance()
+
+    def get_orders(self, limit: int = 25) -> list[Order]:
+        if not self.is_connected():
+            return []
+        try:
+            response = self._client.account_linked().json()
+            account_hash = response[0].get("hashValue", "")
+            from datetime import datetime, timedelta
+            from_time = (datetime.now() - timedelta(days=30)).strftime("%Y-%m-%dT%H:%M:%S+0000")
+            to_time = datetime.now().strftime("%Y-%m-%dT%H:%M:%S+0000")
+            orders_resp = self._client.account_orders(account_hash, from_time, to_time, max_results=limit).json()
+            result = []
+            for o in orders_resp:
+                legs = o.get("orderLegCollection", [{}])
+                instr = legs[0].get("instrument", {}) if legs else {}
+                result.append(Order(
+                    order_id=str(o.get("orderId", "")),
+                    symbol=instr.get("symbol", ""),
+                    side=legs[0].get("instruction", "").lower() if legs else "",
+                    quantity=float(o.get("quantity", 0)),
+                    price=float(o.get("price", 0)),
+                    status=o.get("status", ""),
+                    order_type=o.get("orderType", ""),
+                    placed_at=o.get("enteredTime", ""),
+                ))
+            return result
+        except Exception:
+            return []
diff --git a/stockmind/core/__init__.py b/stockmind/core/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/stockmind/core/alerts.py b/stockmind/core/alerts.py
new file mode 100644
index 0000000..965dcd8
--- /dev/null
+++ b/stockmind/core/alerts.py
@@ -0,0 +1,63 @@
+from __future__ import annotations
+from PyQt6.QtCore import QThread, pyqtSignal
+from core.market_data import get_quote
+from utils.notifications import send_toast
+
+
+class AlertWorker(QThread):
+    alert_triggered = pyqtSignal(str, str, str)  # symbol, type, message
+    check_complete = pyqtSignal()
+
+    def __init__(self, interval_seconds: int = 300):
+        super().__init__()
+        self._interval = interval_seconds
+        self._running = False
+
+    def run(self):
+        self._running = True
+        while self._running:
+            self._check_alerts()
+            self.check_complete.emit()
+            for _ in range(self._interval * 10):
+                if not self._running:
+                    return
+                self.msleep(100)
+
+    def stop(self):
+        self._running = False
+
+    def _check_alerts(self):
+        from db.database import get_session
+        from db.models import Alert
+        from datetime import datetime
+
+        with get_session() as session:
+            active = session.query(Alert).filter_by(is_active=True).all()
+            for alert in active:
+                try:
+                    quote = get_quote(alert.symbol, force=True)
+                    price = quote.get("price", 0.0)
+                    volume = quote.get("volume", 0)
+                    triggered = False
+                    message = ""
+
+                    if alert.alert_type == "price_above" and price >= alert.target_value:
+                        triggered = True
+                        message = f"{alert.symbol} hit ${price:.2f} (above ${alert.target_value:.2f})"
+                    elif alert.alert_type == "price_below" and price <= alert.target_value:
+                        triggered = True
+                        message = f"{alert.symbol} hit ${price:.2f} (below ${alert.target_value:.2f})"
+                    elif alert.alert_type == "volume_spike":
+                        avg_vol = quote.get("avg_volume") or (volume / 1.5)
+                        if avg_vol and volume >= avg_vol * alert.target_value:
+                            triggered = True
+                            message = f"{alert.symbol} volume spike: {volume:,} ({alert.target_value:.1f}x avg)"
+
+                    if triggered:
+                        alert.is_active = False
+                        alert.triggered_at = datetime.utcnow()
+                        session.commit()
+                        send_toast("StockMind Alert", message)
+                        self.alert_triggered.emit(alert.symbol, alert.alert_type, message)
+                except Exception:
+                    continue
diff --git a/stockmind/core/market_data.py b/stockmind/core/market_data.py
new file mode 100644
index 0000000..0ce4612
--- /dev/null
+++ b/stockmind/core/market_data.py
@@ -0,0 +1,177 @@
+from __future__ import annotations
+import time
+from datetime import datetime, timedelta
+from typing import Optional
+import pandas as pd
+import yfinance as yf
+
+_quote_cache: dict[str, tuple[dict, float]] = {}
+_CACHE_TTL = 60  # seconds
+
+
+def get_quote(symbol: str, force: bool = False) -> dict:
+    now = time.time()
+    if not force and symbol in _quote_cache:
+        data, ts = _quote_cache[symbol]
+        if now - ts < _CACHE_TTL:
+            return data
+
+    try:
+        ticker = yf.Ticker(symbol)
+        info = ticker.fast_info
+        hist = ticker.history(period="2d", interval="1d")
+
+        price = float(info.last_price or 0)
+        prev_close = float(info.previous_close or price)
+        change = price - prev_close
+        change_pct = (change / prev_close * 100) if prev_close else 0.0
+
+        data = {
+            "symbol": symbol,
+            "price": price,
+            "change": change,
+            "change_pct": change_pct,
+            "volume": int(info.three_month_average_volume or 0),
+            "market_cap": getattr(info, "market_cap", None),
+            "prev_close": prev_close,
+            "day_high": float(getattr(info, "day_high", price) or price),
+            "day_low": float(getattr(info, "day_low", price) or price),
+            "fifty_two_week_high": float(getattr(info, "fifty_two_week_high", 0) or 0),
+            "fifty_two_week_low": float(getattr(info, "fifty_two_week_low", 0) or 0),
+            "error": None,
+        }
+    except Exception as e:
+        data = {
+            "symbol": symbol, "price": 0.0, "change": 0.0, "change_pct": 0.0,
+            "volume": 0, "market_cap": None, "prev_close": 0.0,
+            "day_high": 0.0, "day_low": 0.0,
+            "fifty_two_week_high": 0.0, "fifty_two_week_low": 0.0,
+            "error": str(e),
+        }
+
+    _quote_cache[symbol] = (data, now)
+    return data
+
+
+def get_history(symbol: str, period: str = "6mo", interval: str = "1d") -> pd.DataFrame:
+    try:
+        ticker = yf.Ticker(symbol)
+        df = ticker.history(period=period, interval=interval)
+        df.index = pd.to_datetime(df.index)
+        return df
+    except Exception:
+        return pd.DataFrame()
+
+
+def get_fundamentals(symbol: str) -> dict:
+    try:
+        ticker = yf.Ticker(symbol)
+        info = ticker.info
+        return {
+            "name": info.get("longName", symbol),
+            "sector": info.get("sector", ""),
+            "industry": info.get("industry", ""),
+            "market_cap": info.get("marketCap"),
+            "pe_ratio": info.get("trailingPE"),
+            "forward_pe": info.get("forwardPE"),
+            "eps": info.get("trailingEps"),
+            "revenue": info.get("totalRevenue"),
+            "profit_margin": info.get("profitMargins"),
+            "dividend_yield": info.get("dividendYield"),
+            "beta": info.get("beta"),
+            "week_52_high": info.get("fiftyTwoWeekHigh"),
+            "week_52_low": info.get("fiftyTwoWeekLow"),
+            "avg_volume": info.get("averageVolume"),
+            "description": info.get("longBusinessSummary", ""),
+        }
+    except Exception:
+        return {"name": symbol, "sector": "", "industry": "", "error": True}
+
+
+def search_symbols(query: str) -> list[dict]:
+    if not query or len(query) < 1:
+        return []
+    try:
+        results = yf.Search(query, max_results=10)
+        quotes = results.quotes if hasattr(results, "quotes") else []
+        return [
+            {"symbol": q.get("symbol", ""), "name": q.get("shortname", q.get("longname", ""))}
+            for q in quotes
+            if q.get("symbol")
+        ]
+    except Exception:
+        return []
+
+
+PERIOD_MAP = {
+    "1D": ("1d", "5m"),
+    "1W": ("5d", "15m"),
+    "1M": ("1mo", "1h"),
+    "3M": ("3mo", "1d"),
+    "6M": ("6mo", "1d"),
+    "1Y": ("1y", "1d"),
+    "5Y": ("5y", "1wk"),
+}
+
+
+def get_chart_data(symbol: str, period_label: str = "6M") -> pd.DataFrame:
+    period, interval = PERIOD_MAP.get(period_label, ("6mo", "1d"))
+    return get_history(symbol, period=period, interval=interval)
+
+
+def get_batch_quotes(symbols: list[str]) -> dict[str, dict]:
+    results = {}
+    for sym in symbols:
+        results[sym] = get_quote(sym)
+    return results
+
+
+SCREENER_UNIVERSE = [
+    "AAPL", "MSFT", "GOOGL", "AMZN", "NVDA", "META", "TSLA", "BRK-B", "UNH", "JPM",
+    "V", "XOM", "JNJ", "PG", "MA", "HD", "CVX", "MRK", "ABBV", "PEP",
+    "KO", "AVGO", "COST", "LLY", "MCD", "TMO", "ACN", "BAC", "CSCO", "WMT",
+    "ABT", "CRM", "DIS", "NFLX", "AMD", "INTC", "QCOM", "TXN", "PYPL", "AMGN",
+    "SPY", "QQQ", "DIA", "GLD", "SLV",
+    "BTC-USD", "ETH-USD", "SOL-USD", "BNB-USD", "ADA-USD",
+]
+
+
+def get_screener_data(symbols: list[str] | None = None) -> list[dict]:
+    if symbols is None:
+        symbols = SCREENER_UNIVERSE
+    results = []
+    for sym in symbols:
+        try:
+            ticker = yf.Ticker(sym)
+            info = ticker.info
+            fast = ticker.fast_info
+            hist = ticker.history(period="1y", interval="1d")
+            rsi_val = None
+            if len(hist) >= 14:
+                delta = hist["Close"].diff()
+                gain = delta.clip(lower=0).rolling(14).mean()
+                loss = (-delta.clip(upper=0)).rolling(14).mean()
+                rs = gain / loss
+                rsi_series = 100 - (100 / (1 + rs))
+                rsi_val = round(float(rsi_series.iloc[-1]), 1) if not rsi_series.empty else None
+
+            price = float(fast.last_price or 0)
+            week_52_high = float(getattr(fast, "year_high", 0) or 0)
+            week_52_low = float(getattr(fast, "year_low", 0) or 0)
+
+            results.append({
+                "symbol": sym,
+                "name": info.get("shortName", sym),
+                "price": price,
+                "sector": info.get("sector", ""),
+                "market_cap": info.get("marketCap"),
+                "pe_ratio": info.get("trailingPE"),
+                "rsi": rsi_val,
+                "week_52_high": week_52_high,
+                "week_52_low": week_52_low,
+                "pct_from_52h": round((price - week_52_high) / week_52_high * 100, 1) if week_52_high else None,
+                "pct_from_52l": round((price - week_52_low) / week_52_low * 100, 1) if week_52_low else None,
+            })
+        except Exception:
+            continue
+    return results
diff --git a/stockmind/core/portfolio.py b/stockmind/core/portfolio.py
new file mode 100644
index 0000000..df137be
--- /dev/null
+++ b/stockmind/core/portfolio.py
@@ -0,0 +1,85 @@
+from __future__ import annotations
+import pandas as pd
+import yfinance as yf
+from core.market_data import get_quote, get_history
+
+
+def calculate_pnl(positions: list[dict], quotes: dict[str, dict]) -> list[dict]:
+    result = []
+    for pos in positions:
+        sym = pos["symbol"]
+        q = quotes.get(sym, {})
+        price = q.get("price", 0.0)
+        shares = pos.get("shares", 0.0)
+        avg_cost = pos.get("avg_cost", 0.0)
+        market_value = price * shares
+        cost_basis = avg_cost * shares
+        pnl = market_value - cost_basis
+        pnl_pct = (pnl / cost_basis * 100) if cost_basis else 0.0
+        result.append({
+            **pos,
+            "price": price,
+            "market_value": market_value,
+            "cost_basis": cost_basis,
+            "pnl": pnl,
+            "pnl_pct": pnl_pct,
+            "change_pct": q.get("change_pct", 0.0),
+        })
+    return result
+
+
+def get_benchmark_performance(period: str = "1y") -> pd.DataFrame:
+    return get_history("SPY", period=period)
+
+
+def calculate_sector_allocation(positions: list[dict]) -> dict[str, float]:
+    sector_values: dict[str, float] = {}
+    for pos in positions:
+        sector = pos.get("sector", "Unknown") or "Unknown"
+        value = pos.get("market_value", 0.0)
+        sector_values[sector] = sector_values.get(sector, 0.0) + value
+    total = sum(sector_values.values())
+    if total == 0:
+        return {}
+    return {s: (v / total * 100) for s, v in sorted(sector_values.items(), key=lambda x: -x[1])}
+
+
+def get_portfolio_performance(positions: list[dict], period: str = "1y") -> pd.DataFrame:
+    if not positions:
+        return pd.DataFrame()
+
+    symbols = [p["symbol"] for p in positions]
+    weights = {}
+    total_value = sum(p.get("market_value", 0) for p in positions)
+
+    if total_value == 0:
+        return pd.DataFrame()
+
+    for p in positions:
+        weights[p["symbol"]] = p.get("market_value", 0) / total_value
+
+    frames = []
+    for sym in symbols:
+        hist = get_history(sym, period=period)
+        if not hist.empty:
+            pct = hist["Close"].pct_change().fillna(0)
+            pct.name = sym
+            frames.append(pct * weights.get(sym, 0))
+
+    if not frames:
+        return pd.DataFrame()
+
+    combined = pd.concat(frames, axis=1).fillna(0)
+    portfolio_returns = combined.sum(axis=1)
+    portfolio_cumulative = (1 + portfolio_returns).cumprod() - 1
+
+    spy = get_history("SPY", period=period)
+    if not spy.empty:
+        spy_returns = spy["Close"].pct_change().fillna(0)
+        spy_cumulative = (1 + spy_returns).cumprod() - 1
+        return pd.DataFrame({
+            "portfolio": portfolio_cumulative,
+            "spy": spy_cumulative,
+        }).dropna()
+
+    return pd.DataFrame({"portfolio": portfolio_cumulative}).dropna()
diff --git a/stockmind/db/__init__.py b/stockmind/db/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/stockmind/db/database.py b/stockmind/db/database.py
new file mode 100644
index 0000000..4694a07
--- /dev/null
+++ b/stockmind/db/database.py
@@ -0,0 +1,39 @@
+import os
+from contextlib import contextmanager
+from pathlib import Path
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker, Session
+from db.models import Base
+
+_DB_PATH = Path(__file__).parent.parent.parent / "stockmind.db"
+_ENGINE = None
+_SessionLocal = None
+
+
+def _get_engine():
+    global _ENGINE
+    if _ENGINE is None:
+        _ENGINE = create_engine(f"sqlite:///{_DB_PATH}", connect_args={"check_same_thread": False})
+    return _ENGINE
+
+
+def init_db():
+    engine = _get_engine()
+    Base.metadata.create_all(engine)
+    global _SessionLocal
+    _SessionLocal = sessionmaker(bind=engine, autoflush=False, autocommit=False)
+
+
+@contextmanager
+def get_session() -> Session:
+    global _SessionLocal
+    if _SessionLocal is None:
+        init_db()
+    session = _SessionLocal()
+    try:
+        yield session
+    except Exception:
+        session.rollback()
+        raise
+    finally:
+        session.close()
diff --git a/stockmind/db/models.py b/stockmind/db/models.py
new file mode 100644
index 0000000..e46f876
--- /dev/null
+++ b/stockmind/db/models.py
@@ -0,0 +1,74 @@
+from datetime import datetime
+from sqlalchemy import String, Float, Integer, Boolean, DateTime, Text
+from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+class WatchlistItem(Base):
+    __tablename__ = "watchlist_items"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    symbol: Mapped[str] = mapped_column(String(20), nullable=False)
+    name: Mapped[str] = mapped_column(String(100), default="")
+    group_name: Mapped[str] = mapped_column(String(50), default="Default")
+    added_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+
+
+class PortfolioPosition(Base):
+    __tablename__ = "portfolio_positions"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    symbol: Mapped[str] = mapped_column(String(20), nullable=False)
+    shares: Mapped[float] = mapped_column(Float, default=0.0)
+    avg_cost: Mapped[float] = mapped_column(Float, default=0.0)
+    broker: Mapped[str] = mapped_column(String(30), default="manual")
+    updated_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+
+
+class Alert(Base):
+    __tablename__ = "alerts"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    symbol: Mapped[str] = mapped_column(String(20), nullable=False)
+    alert_type: Mapped[str] = mapped_column(String(20), nullable=False)  # price_above, price_below, volume_spike
+    target_value: Mapped[float] = mapped_column(Float, nullable=False)
+    is_active: Mapped[bool] = mapped_column(Boolean, default=True)
+    triggered_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+
+
+class Setting(Base):
+    __tablename__ = "settings"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    key: Mapped[str] = mapped_column(String(100), unique=True, nullable=False)
+    value: Mapped[str] = mapped_column(Text, default="")
+
+
+class NewsCache(Base):
+    __tablename__ = "news_cache"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    symbol: Mapped[str] = mapped_column(String(20), nullable=False)
+    title: Mapped[str] = mapped_column(Text, nullable=False)
+    description: Mapped[str] = mapped_column(Text, default="")
+    url: Mapped[str] = mapped_column(Text, default="")
+    source: Mapped[str] = mapped_column(String(100), default="")
+    published_at: Mapped[str] = mapped_column(String(50), default="")
+    sentiment: Mapped[str] = mapped_column(String(20), default="")
+    fetched_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+
+
+class QuoteCache(Base):
+    __tablename__ = "quote_cache"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    symbol: Mapped[str] = mapped_column(String(20), unique=True, nullable=False)
+    price: Mapped[float] = mapped_column(Float, default=0.0)
+    change: Mapped[float] = mapped_column(Float, default=0.0)
+    change_pct: Mapped[float] = mapped_column(Float, default=0.0)
+    volume: Mapped[int] = mapped_column(Integer, default=0)
+    fetched_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
diff --git a/stockmind/main.py b/stockmind/main.py
new file mode 100644
index 0000000..4e99045
--- /dev/null
+++ b/stockmind/main.py
@@ -0,0 +1,42 @@
+import sys
+import os
+
+# Add the stockmind package root to sys.path so imports resolve correctly
+_HERE = os.path.dirname(os.path.abspath(__file__))
+if _HERE not in sys.path:
+    sys.path.insert(0, _HERE)
+
+from PyQt6.QtWidgets import QApplication
+from PyQt6.QtCore import Qt
+from PyQt6.QtGui import QFont
+
+from db.database import init_db
+from utils.config import Config
+from ui.main_window import MainWindow
+
+
+def main():
+    os.environ.setdefault("QT_AUTO_SCREEN_SCALE_FACTOR", "1")
+
+    app = QApplication(sys.argv)
+    app.setApplicationName("StockMind")
+    app.setApplicationVersion("1.0.0")
+    app.setOrganizationName("StockMind")
+    app.setFont(QFont("Segoe UI", 10))
+
+    init_db()
+    config = Config()
+
+    theme = config.get_setting("theme", "dark")
+    qss_path = os.path.join(_HERE, "assets", "styles", f"{theme}.qss")
+    if os.path.exists(qss_path):
+        with open(qss_path, "r") as f:
+            app.setStyleSheet(f.read())
+
+    window = MainWindow(config)
+    window.show()
+    sys.exit(app.exec())
+
+
+if __name__ == "__main__":
+    main()
diff --git a/stockmind/ui/__init__.py b/stockmind/ui/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/stockmind/ui/ai_panel.py b/stockmind/ui/ai_panel.py
new file mode 100644
index 0000000..672ca58
--- /dev/null
+++ b/stockmind/ui/ai_panel.py
@@ -0,0 +1,437 @@
+from __future__ import annotations
+from PyQt6.QtWidgets import (
+    QWidget, QVBoxLayout, QHBoxLayout, QLabel, QPushButton, QTextEdit,
+    QTabWidget, QLineEdit, QSplitter, QFrame, QMessageBox
+)
+from PyQt6.QtCore import Qt, QThread, pyqtSignal
+from PyQt6.QtGui import QFont, QTextCursor
+
+
+class AIWorker(QThread):
+    result_ready = pyqtSignal(str, dict)
+    error = pyqtSignal(str)
+
+    def __init__(self, func, *args, **kwargs):
+        super().__init__()
+        self._func = func
+        self._args = args
+        self._kwargs = kwargs
+
+    def run(self):
+        try:
+            text, usage = self._func(*self._args, **self._kwargs)
+            self.result_ready.emit(text, usage)
+        except Exception as e:
+            self.error.emit(str(e))
+
+
+class AIResultWidget(QFrame):
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        self.setObjectName("card")
+        layout = QVBoxLayout(self)
+        layout.setContentsMargins(8, 8, 8, 8)
+
+        self._text = QTextEdit()
+        self._text.setReadOnly(True)
+        self._text.setFont(QFont("Segoe UI", 10))
+        layout.addWidget(self._text)
+
+        self._cost_label = QLabel("")
+        self._cost_label.setObjectName("subtitle")
+        layout.addWidget(self._cost_label)
+
+    def set_text(self, text: str):
+        self._text.setPlainText(text)
+        cursor = self._text.textCursor()
+        cursor.movePosition(QTextCursor.MoveOperation.Start)
+        self._text.setTextCursor(cursor)
+
+    def set_loading(self):
+        self._text.setPlainText("Analyzing… please wait.")
+        self._cost_label.clear()
+
+    def set_error(self, error: str):
+        self._text.setPlainText(f"Error: {error}")
+        self._cost_label.clear()
+
+    def set_usage(self, usage: dict):
+        if usage:
+            in_tok = usage.get("input_tokens", 0)
+            out_tok = usage.get("output_tokens", 0)
+            cost = usage.get("cost_usd", 0)
+            self._cost_label.setText(f"Tokens: {in_tok} in / {out_tok} out  |  Est. cost: ${cost:.4f}")
+
+
+class AIPanelWidget(QWidget):
+    def __init__(self, config, parent=None):
+        super().__init__(parent)
+        self._config = config
+        self._symbol = "AAPL"
+        self._worker: AIWorker | None = None
+        self._setup_ui()
+
+    def _setup_ui(self):
+        root = QVBoxLayout(self)
+        root.setContentsMargins(12, 12, 12, 12)
+        root.setSpacing(8)
+
+        header_row = QHBoxLayout()
+        header = QLabel("AI Analysis")
+        header.setObjectName("title")
+        header_row.addWidget(header)
+
+        self._symbol_label = QLabel(f"Analyzing: {self._symbol}")
+        self._symbol_label.setObjectName("subtitle")
+        header_row.addWidget(self._symbol_label)
+        header_row.addStretch()
+        root.addLayout(header_row)
+
+        self._tabs = QTabWidget()
+        self._tabs.addTab(self._build_summary_tab(), "Summary")
+        self._tabs.addTab(self._build_technical_tab(), "Technical")
+        self._tabs.addTab(self._build_sentiment_tab(), "Sentiment")
+        self._tabs.addTab(self._build_outlook_tab(), "Outlook")
+        self._tabs.addTab(self._build_chat_tab(), "Chat")
+        self._tabs.addTab(self._build_portfolio_tab(), "Portfolio")
+        root.addWidget(self._tabs)
+
+    def _make_tab_layout(self, title: str, btn_text: str, on_click) -> tuple[QWidget, AIResultWidget]:
+        tab = QWidget()
+        layout = QVBoxLayout(tab)
+        layout.setContentsMargins(8, 8, 8, 8)
+
+        top_row = QHBoxLayout()
+        lbl = QLabel(title)
+        lbl.setObjectName("subtitle")
+        top_row.addWidget(lbl)
+        top_row.addStretch()
+        btn = QPushButton(btn_text)
+        btn.setObjectName("primary_btn")
+        btn.setMaximumWidth(160)
+        btn.clicked.connect(on_click)
+        top_row.addWidget(btn)
+        layout.addLayout(top_row)
+
+        result = AIResultWidget()
+        layout.addWidget(result)
+        return tab, result
+
+    def _build_summary_tab(self) -> QWidget:
+        tab, self._summary_result = self._make_tab_layout(
+            "AI Stock Summary — fundamentals + news digest",
+            "Run Summary",
+            self._run_summary,
+        )
+        return tab
+
+    def _build_technical_tab(self) -> QWidget:
+        tab, self._technical_result = self._make_tab_layout(
+            "AI Technical Read — chart pattern analysis",
+            "Run Technical",
+            self._run_technical,
+        )
+        return tab
+
+    def _build_sentiment_tab(self) -> QWidget:
+        tab, self._sentiment_result = self._make_tab_layout(
+            "AI Sentiment Score — news → Bull/Bear/Neutral",
+            "Run Sentiment",
+            self._run_sentiment,
+        )
+        return tab
+
+    def _build_outlook_tab(self) -> QWidget:
+        tab, self._outlook_result = self._make_tab_layout(
+            "AI Price Outlook — 1D/1W/1M directional bias",
+            "Run Outlook",
+            self._run_outlook,
+        )
+        return tab
+
+    def _build_chat_tab(self) -> QWidget:
+        tab = QWidget()
+        layout = QVBoxLayout(tab)
+        layout.setContentsMargins(8, 8, 8, 8)
+
+        self._chat_display = QTextEdit()
+        self._chat_display.setReadOnly(True)
+        self._chat_display.setFont(QFont("Segoe UI", 10))
+        layout.addWidget(self._chat_display, stretch=1)
+
+        self._chat_cost_label = QLabel("")
+        self._chat_cost_label.setObjectName("subtitle")
+        layout.addWidget(self._chat_cost_label)
+
+        input_row = QHBoxLayout()
+        self._chat_input = QLineEdit()
+        self._chat_input.setPlaceholderText(f"Ask anything about {self._symbol}…")
+        self._chat_input.returnPressed.connect(self._send_chat)
+        send_btn = QPushButton("Send")
+        send_btn.setObjectName("primary_btn")
+        send_btn.clicked.connect(self._send_chat)
+        input_row.addWidget(self._chat_input)
+        input_row.addWidget(send_btn)
+        layout.addLayout(input_row)
+        return tab
+
+    def _build_portfolio_tab(self) -> QWidget:
+        tab, self._portfolio_result = self._make_tab_layout(
+            "AI Portfolio Review — risks, correlation, recommendations",
+            "Review Portfolio",
+            self._run_portfolio_review,
+        )
+        return tab
+
+    def _get_client(self):
+        from ai.claude_client import ClaudeClient
+        key = self._config.anthropic_key
+        if not key:
+            raise RuntimeError("Anthropic API key not configured. Go to Settings.")
+        return ClaudeClient(key)
+
+    def set_symbol(self, symbol: str):
+        self._symbol = symbol
+        self._symbol_label.setText(f"Analyzing: {symbol}")
+        self._chat_input.setPlaceholderText(f"Ask anything about {symbol}…")
+
+    def _run_summary(self):
+        self._summary_result.set_loading()
+        try:
+            client = self._get_client()
+        except RuntimeError as e:
+            self._summary_result.set_error(str(e))
+            return
+
+        def _fetch():
+            from core.market_data import get_fundamentals, get_quote
+            from ai.sentiment import fetch_news
+            from ai.prompts import STOCK_SUMMARY_SYSTEM, STOCK_SUMMARY_PROMPT
+            from utils.formatters import fmt_currency, fmt_large_number
+
+            info = get_fundamentals(self._symbol)
+            news = fetch_news(self._symbol, self._config.news_api_key, page_size=5)
+            headlines = "\n".join(f"- {a['title']}" for a in news[:5]) or "No recent news."
+            prompt = STOCK_SUMMARY_PROMPT.format(
+                symbol=self._symbol,
+                name=info.get("name", self._symbol),
+                sector=info.get("sector", "N/A"),
+                industry=info.get("industry", "N/A"),
+                market_cap=fmt_large_number(info.get("market_cap")),
+                pe_ratio=f"{info.get('pe_ratio', 'N/A')}",
+                eps=f"{info.get('eps', 'N/A')}",
+                week_52_high=fmt_currency(info.get("week_52_high")),
+                week_52_low=fmt_currency(info.get("week_52_low")),
+                dividend_yield=f"{info.get('dividend_yield', 'N/A')}",
+                headlines=headlines,
+            )
+            return client.ask(prompt, system=STOCK_SUMMARY_SYSTEM, max_tokens=1024)
+
+        self._worker = AIWorker(_fetch)
+        self._worker.result_ready.connect(lambda t, u: (self._summary_result.set_text(t), self._summary_result.set_usage(u)))
+        self._worker.error.connect(self._summary_result.set_error)
+        self._worker.start()
+
+    def _run_technical(self):
+        self._technical_result.set_loading()
+        try:
+            client = self._get_client()
+        except RuntimeError as e:
+            self._technical_result.set_error(str(e))
+            return
+
+        def _fetch():
+            import numpy as np
+            import pandas as pd
+            from core.market_data import get_chart_data
+            from ai.prompts import TECHNICAL_READ_SYSTEM, TECHNICAL_READ_PROMPT
+            from utils.formatters import fmt_currency
+
+            df = get_chart_data(self._symbol, "3M")
+            if df.empty:
+                raise RuntimeError("No chart data available.")
+
+            closes = df["Close"].values.astype(float)
+            current_price = closes[-1]
+            sma20 = float(pd.Series(closes).rolling(20).mean().iloc[-1]) if len(closes) >= 20 else None
+            sma50 = float(pd.Series(closes).rolling(50).mean().iloc[-1]) if len(closes) >= 50 else None
+
+            delta = pd.Series(closes).diff()
+            gain = delta.clip(lower=0).rolling(14).mean()
+            loss = (-delta.clip(upper=0)).rolling(14).mean()
+            rsi_val = float(100 - (100 / (1 + gain / loss)).iloc[-1]) if len(closes) >= 14 else None
+
+            ema12 = pd.Series(closes).ewm(span=12).mean()
+            ema26 = pd.Series(closes).ewm(span=26).mean()
+            macd_val = float((ema12 - ema26).iloc[-1])
+            signal_val = float((ema12 - ema26).ewm(span=9).mean().iloc[-1])
+
+            sma20_s = pd.Series(closes).rolling(20)
+            bb_upper = float((sma20_s.mean() + 2 * sma20_s.std()).iloc[-1]) if len(closes) >= 20 else None
+            bb_lower = float((sma20_s.mean() - 2 * sma20_s.std()).iloc[-1]) if len(closes) >= 20 else None
+
+            trend = "uptrend" if len(closes) >= 20 and closes[-1] > closes[-20] else "downtrend"
+            prompt = TECHNICAL_READ_PROMPT.format(
+                symbol=self._symbol, period="3M",
+                price=fmt_currency(current_price),
+                sma20=fmt_currency(sma20) if sma20 else "N/A",
+                sma50=fmt_currency(sma50) if sma50 else "N/A",
+                rsi=f"{rsi_val:.1f}" if rsi_val else "N/A",
+                macd=f"{macd_val:.3f}", macd_signal=f"{signal_val:.3f}",
+                bb_upper=fmt_currency(bb_upper) if bb_upper else "N/A",
+                bb_lower=fmt_currency(bb_lower) if bb_lower else "N/A",
+                price_action=trend,
+            )
+            return client.ask(prompt, system=TECHNICAL_READ_SYSTEM, max_tokens=800)
+
+        self._worker = AIWorker(_fetch)
+        self._worker.result_ready.connect(lambda t, u: (self._technical_result.set_text(t), self._technical_result.set_usage(u)))
+        self._worker.error.connect(self._technical_result.set_error)
+        self._worker.start()
+
+    def _run_sentiment(self):
+        self._sentiment_result.set_loading()
+        try:
+            client = self._get_client()
+        except RuntimeError as e:
+            self._sentiment_result.set_error(str(e))
+            return
+
+        def _fetch():
+            from ai.sentiment import fetch_news, analyze_sentiment
+            articles = fetch_news(self._symbol, self._config.news_api_key)
+            return analyze_sentiment(self._symbol, articles, client)
+
+        self._worker = AIWorker(_fetch)
+        self._worker.result_ready.connect(lambda t, u: (self._sentiment_result.set_text(t), self._sentiment_result.set_usage(u)))
+        self._worker.error.connect(self._sentiment_result.set_error)
+        self._worker.start()
+
+    def _run_outlook(self):
+        self._outlook_result.set_loading()
+        try:
+            client = self._get_client()
+        except RuntimeError as e:
+            self._outlook_result.set_error(str(e))
+            return
+
+        def _fetch():
+            import pandas as pd
+            from core.market_data import get_chart_data, get_quote
+            from ai.prompts import PRICE_OUTLOOK_SYSTEM, PRICE_OUTLOOK_PROMPT
+            from utils.formatters import fmt_currency
+
+            df = get_chart_data(self._symbol, "1M")
+            closes = df["Close"].values.astype(float) if not df.empty else []
+            rsi_val = "N/A"
+            trend = "neutral"
+            momentum = "neutral"
+
+            if len(closes) >= 14:
+                delta = pd.Series(closes).diff()
+                gain = delta.clip(lower=0).rolling(14).mean()
+                loss = (-delta.clip(upper=0)).rolling(14).mean()
+                rsi_v = float(100 - (100 / (1 + gain / loss)).iloc[-1])
+                rsi_val = f"{rsi_v:.1f}"
+                trend = "uptrend" if closes[-1] > closes[-5] else "downtrend"
+                momentum = "bullish" if rsi_v > 55 else ("bearish" if rsi_v < 45 else "neutral")
+
+            quote = get_quote(self._symbol)
+            prompt = PRICE_OUTLOOK_PROMPT.format(
+                symbol=self._symbol,
+                price=fmt_currency(quote.get("price", 0)),
+                rsi=rsi_val, trend=trend, momentum=momentum,
+                sentiment="N/A", sector_perf="N/A",
+            )
+            return client.ask(prompt, system=PRICE_OUTLOOK_SYSTEM, max_tokens=600)
+
+        self._worker = AIWorker(_fetch)
+        self._worker.result_ready.connect(lambda t, u: (self._outlook_result.set_text(t), self._outlook_result.set_usage(u)))
+        self._worker.error.connect(self._outlook_result.set_error)
+        self._worker.start()
+
+    def _send_chat(self):
+        question = self._chat_input.text().strip()
+        if not question:
+            return
+        try:
+            client = self._get_client()
+        except RuntimeError as e:
+            self._chat_display.append(f"\nError: {e}")
+            return
+
+        self._chat_display.append(f"\nYou: {question}")
+        self._chat_input.clear()
+        self._chat_display.append("AI: thinking…\n")
+
+        def _fetch():
+            from ai.prompts import CHAT_SYSTEM
+            context = f"Current ticker being analyzed: {self._symbol}\nUser question: {question}"
+            return client.ask(context, system=CHAT_SYSTEM, max_tokens=1024)
+
+        def _on_result(text: str, usage: dict):
+            cursor = self._chat_display.textCursor()
+            cursor.movePosition(QTextCursor.MoveOperation.End)
+            cursor.movePosition(QTextCursor.MoveOperation.StartOfBlock, QTextCursor.MoveMode.KeepAnchor)
+            cursor.removeSelectedText()
+            self._chat_display.append(f"AI: {text}\n")
+            in_tok = usage.get("input_tokens", 0)
+            out_tok = usage.get("output_tokens", 0)
+            cost = usage.get("cost_usd", 0)
+            self._chat_cost_label.setText(f"Last: {in_tok}in/{out_tok}out — ${cost:.4f}")
+
+        self._worker = AIWorker(_fetch)
+        self._worker.result_ready.connect(_on_result)
+        self._worker.error.connect(lambda e: self._chat_display.append(f"Error: {e}\n"))
+        self._worker.start()
+
+    def _run_portfolio_review(self):
+        self._portfolio_result.set_loading()
+        try:
+            client = self._get_client()
+        except RuntimeError as e:
+            self._portfolio_result.set_error(str(e))
+            return
+
+        def _fetch():
+            from db.database import get_session
+            from db.models import PortfolioPosition
+            from core.market_data import get_batch_quotes
+            from core.portfolio import calculate_pnl, calculate_sector_allocation
+            from ai.prompts import PORTFOLIO_REVIEW_SYSTEM, PORTFOLIO_REVIEW_PROMPT
+            from utils.formatters import fmt_currency, fmt_percent
+
+            with get_session() as session:
+                rows = session.query(PortfolioPosition).all()
+                raw = [{"symbol": r.symbol, "shares": r.shares, "avg_cost": r.avg_cost} for r in rows]
+
+            if not raw:
+                raise RuntimeError("No portfolio positions found. Add positions first.")
+
+            quotes = get_batch_quotes([r["symbol"] for r in raw])
+            positions = calculate_pnl(raw, quotes)
+            total_value = sum(p.get("market_value", 0) for p in positions)
+            cash = 0.0
+            top_pos = max(positions, key=lambda p: p.get("market_value", 0), default={})
+            sector_alloc = calculate_sector_allocation(positions)
+
+            holdings_str = "\n".join(
+                f"- {p['symbol']}: {p.get('shares', 0):.2f} shares @ {fmt_currency(p.get('avg_cost', 0))}, "
+                f"value={fmt_currency(p.get('market_value', 0))}, P&L={fmt_percent(p.get('pnl_pct', 0))}"
+                for p in positions
+            )
+            sector_str = ", ".join(f"{s}: {v:.1f}%" for s, v in sector_alloc.items())
+
+            prompt = PORTFOLIO_REVIEW_PROMPT.format(
+                holdings=holdings_str,
+                total_value=fmt_currency(total_value),
+                cash=fmt_currency(cash),
+                top_position=top_pos.get("symbol", "N/A"),
+                sector_allocation=sector_str,
+            )
+            return client.ask(prompt, system=PORTFOLIO_REVIEW_SYSTEM, max_tokens=1200)
+
+        self._worker = AIWorker(_fetch)
+        self._worker.result_ready.connect(lambda t, u: (self._portfolio_result.set_text(t), self._portfolio_result.set_usage(u)))
+        self._worker.error.connect(self._portfolio_result.set_error)
+        self._worker.start()
diff --git a/stockmind/ui/chart_widget.py b/stockmind/ui/chart_widget.py
new file mode 100644
index 0000000..df0807e
--- /dev/null
+++ b/stockmind/ui/chart_widget.py
@@ -0,0 +1,355 @@
+from __future__ import annotations
+import numpy as np
+import pandas as pd
+import pyqtgraph as pg
+from PyQt6.QtWidgets import (
+    QWidget, QVBoxLayout, QHBoxLayout, QLabel, QLineEdit,
+    QPushButton, QCheckBox, QCompleter, QSizePolicy, QFrame
+)
+from PyQt6.QtCore import Qt, QStringListModel, QThread, pyqtSignal, QTimer
+from PyQt6.QtGui import QPicture, QPainter, QColor, QPen, QBrush, QFont
+from PyQt6.QtCore import QRectF, QPointF
+from utils.formatters import fmt_currency, fmt_percent, pnl_color
+
+PERIODS = ["1D", "1W", "1M", "3M", "6M", "1Y", "5Y"]
+INDICATORS = ["SMA20", "SMA50", "EMA20", "BB", "Volume", "RSI", "MACD"]
+
+COLORS = {
+    "up": "#a6e3a1",
+    "down": "#f38ba8",
+    "sma20": "#89b4fa",
+    "sma50": "#fab387",
+    "ema20": "#cba6f7",
+    "bb_upper": "#89dceb",
+    "bb_lower": "#89dceb",
+    "bb_fill": "#1a3a4a",
+    "volume_up": "#a6e3a1",
+    "volume_down": "#f38ba8",
+    "rsi_line": "#cba6f7",
+    "macd_line": "#89b4fa",
+    "macd_signal": "#fab387",
+    "macd_pos": "#a6e3a1",
+    "macd_neg": "#f38ba8",
+}
+
+
+class CandlestickItem(pg.GraphicsObject):
+    def __init__(self, df: pd.DataFrame):
+        super().__init__()
+        self._df = df
+        self._picture = QPicture()
+        self._generate()
+
+    def _generate(self):
+        self._picture = QPicture()
+        p = QPainter(self._picture)
+        p.setRenderHint(QPainter.RenderHint.Antialiasing, False)
+        w = 0.3
+
+        for i, (ts, row) in enumerate(self._df.iterrows()):
+            t = float(i)
+            o, c, lo, hi = float(row["Open"]), float(row["Close"]), float(row["Low"]), float(row["High"])
+            is_up = c >= o
+            color = QColor(COLORS["up"] if is_up else COLORS["down"])
+            pen = QPen(color)
+            pen.setWidthF(1.0)
+            p.setPen(pen)
+            p.setBrush(QBrush(color))
+            p.drawLine(QPointF(t, lo), QPointF(t, hi))
+            body_top = max(o, c)
+            body_bot = min(o, c)
+            body_h = max(body_top - body_bot, 0.001)
+            p.drawRect(QRectF(t - w, body_bot, w * 2, body_h))
+
+        p.end()
+
+    def paint(self, p, *args):
+        p.drawPicture(0, 0, self._picture)
+
+    def boundingRect(self):
+        return QRectF(self._picture.boundingRect())
+
+
+class DateAxisItem(pg.AxisItem):
+    def __init__(self, timestamps: list, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self._timestamps = timestamps
+
+    def tickStrings(self, values, scale, spacing):
+        result = []
+        for v in values:
+            idx = int(round(v))
+            if 0 <= idx < len(self._timestamps):
+                ts = self._timestamps[idx]
+                if hasattr(ts, "strftime"):
+                    result.append(ts.strftime("%m/%d"))
+                else:
+                    result.append(str(ts)[:10])
+            else:
+                result.append("")
+        return result
+
+
+class ChartDataWorker(QThread):
+    data_ready = pyqtSignal(object, str)
+    error = pyqtSignal(str)
+
+    def __init__(self, symbol: str, period: str):
+        super().__init__()
+        self.symbol = symbol
+        self.period = period
+
+    def run(self):
+        try:
+            from core.market_data import get_chart_data
+            df = get_chart_data(self.symbol, self.period)
+            self.data_ready.emit(df, self.symbol)
+        except Exception as e:
+            self.error.emit(str(e))
+
+
+class ChartWidget(QWidget):
+    symbol_changed = pyqtSignal(str)
+
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        self._symbol = "AAPL"
+        self._period = "6M"
+        self._df: pd.DataFrame | None = None
+        self._worker: ChartDataWorker | None = None
+        self._active_indicators: set[str] = {"Volume"}
+        self._setup_ui()
+        self._setup_autocomplete()
+        self.load_symbol(self._symbol)
+
+    def _setup_ui(self):
+        root = QVBoxLayout(self)
+        root.setContentsMargins(12, 12, 12, 12)
+        root.setSpacing(8)
+
+        # Search + quote bar
+        top_bar = QHBoxLayout()
+        self._search = QLineEdit()
+        self._search.setPlaceholderText("Search symbol… (e.g. AAPL, BTC-USD)")
+        self._search.setMaximumWidth(280)
+        self._search.returnPressed.connect(self._on_search)
+        top_bar.addWidget(self._search)
+
+        self._quote_label = QLabel()
+        self._quote_label.setFont(QFont("Segoe UI", 11, QFont.Weight.Bold))
+        top_bar.addWidget(self._quote_label)
+        self._change_label = QLabel()
+        top_bar.addWidget(self._change_label)
+        top_bar.addStretch()
+        root.addLayout(top_bar)
+
+        # Period buttons
+        period_bar = QHBoxLayout()
+        self._period_btns: dict[str, QPushButton] = {}
+        for p in PERIODS:
+            btn = QPushButton(p)
+            btn.setCheckable(True)
+            btn.setMaximumWidth(48)
+            btn.clicked.connect(lambda checked, period=p: self._set_period(period))
+            self._period_btns[p] = btn
+            period_bar.addWidget(btn)
+
+        period_bar.addSpacing(20)
+
+        for ind in INDICATORS:
+            cb = QCheckBox(ind)
+            cb.setChecked(ind == "Volume")
+            cb.stateChanged.connect(lambda state, i=ind: self._toggle_indicator(i, state))
+            period_bar.addWidget(cb)
+
+        period_bar.addStretch()
+        root.addLayout(period_bar)
+
+        self._period_btns["6M"].setChecked(True)
+
+        # Chart area
+        pg.setConfigOptions(antialias=True, foreground="#6c7086", background="#1e1e2e")
+        self._layout_widget = pg.GraphicsLayoutWidget()
+        root.addWidget(self._layout_widget)
+
+        self._status_label = QLabel("Loading…")
+        self._status_label.setObjectName("subtitle")
+        root.addWidget(self._status_label)
+
+        self._build_plots()
+
+    def _build_plots(self):
+        self._layout_widget.clear()
+        self._main_plot: pg.PlotItem = self._layout_widget.addPlot(row=0, col=0)
+        self._main_plot.showGrid(x=False, y=True, alpha=0.15)
+        self._main_plot.getAxis("left").setWidth(60)
+        self._main_plot.getAxis("bottom").setStyle(showValues=False)
+        self._main_plot.setMinimumHeight(260)
+
+        self._vol_plot: pg.PlotItem = self._layout_widget.addPlot(row=1, col=0)
+        self._vol_plot.setMaximumHeight(80)
+        self._vol_plot.showGrid(x=False, y=True, alpha=0.1)
+        self._vol_plot.getAxis("left").setWidth(60)
+        self._vol_plot.setXLink(self._main_plot)
+
+        self._rsi_plot: pg.PlotItem = self._layout_widget.addPlot(row=2, col=0)
+        self._rsi_plot.setMaximumHeight(100)
+        self._rsi_plot.showGrid(x=False, y=True, alpha=0.1)
+        self._rsi_plot.getAxis("left").setWidth(60)
+        self._rsi_plot.setXLink(self._main_plot)
+        self._rsi_plot.setYRange(0, 100)
+        self._rsi_plot.hide()
+
+        self._macd_plot: pg.PlotItem = self._layout_widget.addPlot(row=3, col=0)
+        self._macd_plot.setMaximumHeight(100)
+        self._macd_plot.showGrid(x=False, y=True, alpha=0.1)
+        self._macd_plot.getAxis("left").setWidth(60)
+        self._macd_plot.setXLink(self._main_plot)
+        self._macd_plot.hide()
+
+    def _setup_autocomplete(self):
+        common = [
+            "AAPL", "MSFT", "GOOGL", "AMZN", "NVDA", "META", "TSLA", "SPY", "QQQ",
+            "JPM", "BAC", "V", "MA", "NFLX", "AMD", "INTC", "DIS", "WMT", "KO",
+            "BTC-USD", "ETH-USD", "SOL-USD", "BNB-USD", "XRP-USD",
+        ]
+        self._completer_model = QStringListModel(common)
+        completer = QCompleter(self._completer_model)
+        completer.setCaseSensitivity(Qt.CaseSensitivity.CaseInsensitive)
+        self._search.setCompleter(completer)
+
+    def _on_search(self):
+        text = self._search.text().strip().upper()
+        if text:
+            self.load_symbol(text)
+
+    def _set_period(self, period: str):
+        for p, btn in self._period_btns.items():
+            btn.setChecked(p == period)
+        self._period = period
+        if self._symbol:
+            self.load_symbol(self._symbol)
+
+    def _toggle_indicator(self, indicator: str, state: int):
+        if state:
+            self._active_indicators.add(indicator)
+        else:
+            self._active_indicators.discard(indicator)
+        if self._df is not None:
+            self._render_chart(self._df)
+
+    def load_symbol(self, symbol: str):
+        self._symbol = symbol.upper()
+        self._status_label.setText(f"Loading {self._symbol}…")
+        self._quote_label.setText(self._symbol)
+        self._change_label.clear()
+        if self._worker and self._worker.isRunning():
+            self._worker.quit()
+        self._worker = ChartDataWorker(self._symbol, self._period)
+        self._worker.data_ready.connect(self._on_data_ready)
+        self._worker.error.connect(lambda e: self._status_label.setText(f"Error: {e}"))
+        self._worker.start()
+        self.symbol_changed.emit(self._symbol)
+
+    def _on_data_ready(self, df: pd.DataFrame, symbol: str):
+        if df.empty:
+            self._status_label.setText(f"No data for {symbol}")
+            return
+        self._df = df
+        self._render_chart(df)
+        self._status_label.setText(f"{symbol}  |  {len(df)} bars  |  {self._period}")
+        self._update_quote_display(df)
+
+    def _update_quote_display(self, df: pd.DataFrame):
+        last = float(df["Close"].iloc[-1])
+        prev = float(df["Close"].iloc[-2]) if len(df) > 1 else last
+        change = last - prev
+        change_pct = (change / prev * 100) if prev else 0
+        self._quote_label.setText(f"{self._symbol}   {fmt_currency(last)}")
+        self._change_label.setText(f"{'+' if change >= 0 else ''}{fmt_currency(change)}  {fmt_percent(change_pct, plus=True)}")
+        self._change_label.setStyleSheet(f"color: {pnl_color(change)};")
+
+    def _render_chart(self, df: pd.DataFrame):
+        self._build_plots()
+        xs = np.arange(len(df))
+        timestamps = list(df.index)
+
+        date_axis = DateAxisItem(timestamps, orientation="bottom")
+        self._main_plot.getAxis("bottom").hide()
+
+        candle = CandlestickItem(df)
+        self._main_plot.addItem(candle)
+
+        # Overlaid indicators
+        closes = df["Close"].values.astype(float)
+
+        if "SMA20" in self._active_indicators and len(closes) >= 20:
+            sma20 = pd.Series(closes).rolling(20).mean().values
+            self._main_plot.plot(xs, sma20, pen=pg.mkPen(COLORS["sma20"], width=1.5), name="SMA20")
+
+        if "SMA50" in self._active_indicators and len(closes) >= 50:
+            sma50 = pd.Series(closes).rolling(50).mean().values
+            self._main_plot.plot(xs, sma50, pen=pg.mkPen(COLORS["sma50"], width=1.5), name="SMA50")
+
+        if "EMA20" in self._active_indicators and len(closes) >= 20:
+            ema20 = pd.Series(closes).ewm(span=20).mean().values
+            self._main_plot.plot(xs, ema20, pen=pg.mkPen(COLORS["ema20"], width=1.5), name="EMA20")
+
+        if "BB" in self._active_indicators and len(closes) >= 20:
+            sma = pd.Series(closes).rolling(20).mean()
+            std = pd.Series(closes).rolling(20).std()
+            upper = (sma + 2 * std).values
+            lower = (sma - 2 * std).values
+            self._main_plot.plot(xs, upper, pen=pg.mkPen(COLORS["bb_upper"], width=1, style=Qt.PenStyle.DashLine))
+            self._main_plot.plot(xs, lower, pen=pg.mkPen(COLORS["bb_lower"], width=1, style=Qt.PenStyle.DashLine))
+            fill = pg.FillBetweenItem(
+                self._main_plot.plot(xs, upper, pen=None),
+                self._main_plot.plot(xs, lower, pen=None),
+                brush=pg.mkBrush(QColor(137, 220, 235, 30)),
+            )
+            self._main_plot.addItem(fill)
+
+        # Volume
+        if "Volume" in self._active_indicators:
+            volumes = df["Volume"].values.astype(float)
+            colors = [COLORS["volume_up"] if df["Close"].iloc[i] >= df["Open"].iloc[i] else COLORS["volume_down"] for i in range(len(df))]
+            brushes = [pg.mkBrush(QColor(c)) for c in colors]
+            bar = pg.BarGraphItem(x=xs, height=volumes, width=0.6, brushes=brushes, pens=[pg.mkPen(None)] * len(xs))
+            self._vol_plot.addItem(bar)
+            self._vol_plot.show()
+        else:
+            self._vol_plot.hide()
+
+        # RSI
+        if "RSI" in self._active_indicators and len(closes) >= 14:
+            delta = pd.Series(closes).diff()
+            gain = delta.clip(lower=0).rolling(14).mean()
+            loss = (-delta.clip(upper=0)).rolling(14).mean()
+            rs = gain / loss
+            rsi = (100 - (100 / (1 + rs))).values
+            self._rsi_plot.clear()
+            self._rsi_plot.plot(xs, rsi, pen=pg.mkPen(COLORS["rsi_line"], width=1.5))
+            self._rsi_plot.addLine(y=70, pen=pg.mkPen("#f38ba8", width=1, style=Qt.PenStyle.DashLine))
+            self._rsi_plot.addLine(y=30, pen=pg.mkPen("#a6e3a1", width=1, style=Qt.PenStyle.DashLine))
+            self._rsi_plot.show()
+        else:
+            self._rsi_plot.hide()
+
+        # MACD
+        if "MACD" in self._active_indicators and len(closes) >= 26:
+            ema12 = pd.Series(closes).ewm(span=12).mean()
+            ema26 = pd.Series(closes).ewm(span=26).mean()
+            macd_line = (ema12 - ema26).values
+            signal_line = pd.Series(macd_line).ewm(span=9).mean().values
+            histogram = macd_line - signal_line
+            self._macd_plot.clear()
+            hist_colors = [COLORS["macd_pos"] if v >= 0 else COLORS["macd_neg"] for v in histogram]
+            bar2 = pg.BarGraphItem(x=xs, height=histogram, width=0.6,
+                                   brushes=[pg.mkBrush(QColor(c)) for c in hist_colors],
+                                   pens=[pg.mkPen(None)] * len(xs))
+            self._macd_plot.addItem(bar2)
+            self._macd_plot.plot(xs, macd_line, pen=pg.mkPen(COLORS["macd_line"], width=1.5))
+            self._macd_plot.plot(xs, signal_line, pen=pg.mkPen(COLORS["macd_signal"], width=1.5))
+            self._macd_plot.show()
+        else:
+            self._macd_plot.hide()
diff --git a/stockmind/ui/dashboard_widget.py b/stockmind/ui/dashboard_widget.py
new file mode 100644
index 0000000..16251ae
--- /dev/null
+++ b/stockmind/ui/dashboard_widget.py
@@ -0,0 +1,135 @@
+from __future__ import annotations
+from PyQt6.QtWidgets import (
+    QWidget, QVBoxLayout, QHBoxLayout, QLabel, QGridLayout, QFrame, QSizePolicy
+)
+from PyQt6.QtCore import Qt, QTimer, pyqtSignal, QThread
+from PyQt6.QtGui import QFont
+from utils.formatters import fmt_currency, fmt_percent, pnl_color
+
+INDICES = [
+    ("SPY", "S&P 500"),
+    ("QQQ", "NASDAQ 100"),
+    ("DIA", "Dow Jones"),
+    ("BTC-USD", "Bitcoin"),
+    ("ETH-USD", "Ethereum"),
+]
+
+
+class QuoteCard(QFrame):
+    clicked = pyqtSignal(str)
+
+    def __init__(self, symbol: str, name: str, parent=None):
+        super().__init__(parent)
+        self.symbol = symbol
+        self.setObjectName("card")
+        self.setCursor(Qt.CursorShape.PointingHandCursor)
+        self.setSizePolicy(QSizePolicy.Policy.Expanding, QSizePolicy.Policy.Fixed)
+        self.setMinimumHeight(100)
+
+        layout = QVBoxLayout(self)
+        layout.setContentsMargins(12, 10, 12, 10)
+        layout.setSpacing(2)
+
+        top = QHBoxLayout()
+        self._symbol_label = QLabel(symbol)
+        self._symbol_label.setFont(QFont("Segoe UI", 10, QFont.Weight.Bold))
+        self._name_label = QLabel(name)
+        self._name_label.setObjectName("subtitle")
+        self._name_label.setAlignment(Qt.AlignmentFlag.AlignRight)
+        top.addWidget(self._symbol_label)
+        top.addWidget(self._name_label)
+        layout.addLayout(top)
+
+        self._price_label = QLabel("—")
+        self._price_label.setFont(QFont("Segoe UI", 16, QFont.Weight.Bold))
+        layout.addWidget(self._price_label)
+
+        self._change_label = QLabel("—")
+        self._change_label.setObjectName("subtitle")
+        layout.addWidget(self._change_label)
+
+    def update_quote(self, data: dict):
+        price = data.get("price", 0)
+        change = data.get("change", 0)
+        change_pct = data.get("change_pct", 0)
+        self._price_label.setText(fmt_currency(price))
+        sign = "+" if change >= 0 else ""
+        self._change_label.setText(f"{sign}{fmt_currency(change, 2)}  {fmt_percent(change_pct, plus=True)}")
+        color = pnl_color(change)
+        self._change_label.setStyleSheet(f"color: {color};")
+
+    def mousePressEvent(self, event):
+        self.clicked.emit(self.symbol)
+        super().mousePressEvent(event)
+
+
+class FetchWorker(QThread):
+    quotes_ready = pyqtSignal(dict)
+
+    def __init__(self, symbols: list[str]):
+        super().__init__()
+        self._symbols = symbols
+
+    def run(self):
+        from core.market_data import get_batch_quotes
+        data = get_batch_quotes(self._symbols)
+        self.quotes_ready.emit(data)
+
+
+class DashboardWidget(QWidget):
+    symbol_selected = pyqtSignal(str)
+
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        self._cards: dict[str, QuoteCard] = {}
+        self._worker: FetchWorker | None = None
+        self._setup_ui()
+        self._start_refresh()
+
+    def _setup_ui(self):
+        root = QVBoxLayout(self)
+        root.setContentsMargins(20, 20, 20, 20)
+        root.setSpacing(16)
+
+        header = QLabel("Market Overview")
+        header.setObjectName("title")
+        root.addWidget(header)
+
+        self._status_label = QLabel("Refreshing...")
+        self._status_label.setObjectName("subtitle")
+        root.addWidget(self._status_label)
+
+        grid = QGridLayout()
+        grid.setSpacing(12)
+        for i, (symbol, name) in enumerate(INDICES):
+            card = QuoteCard(symbol, name)
+            card.clicked.connect(self.symbol_selected)
+            self._cards[symbol] = card
+            grid.addWidget(card, i // 3, i % 3)
+
+        root.addLayout(grid)
+        root.addStretch()
+
+    def _start_refresh(self):
+        self._timer = QTimer(self)
+        self._timer.timeout.connect(self._fetch_quotes)
+        self._timer.start(300_000)  # 5 min
+        self._fetch_quotes()
+
+    def _fetch_quotes(self):
+        if self._worker and self._worker.isRunning():
+            return
+        self._status_label.setText("Refreshing...")
+        self._worker = FetchWorker([s for s, _ in INDICES])
+        self._worker.quotes_ready.connect(self._on_quotes_ready)
+        self._worker.start()
+
+    def _on_quotes_ready(self, data: dict):
+        from datetime import datetime
+        for sym, quote in data.items():
+            if sym in self._cards:
+                self._cards[sym].update_quote(quote)
+        self._status_label.setText(f"Updated {datetime.now().strftime('%H:%M:%S')}  (15-min delayed)")
+
+    def force_refresh(self):
+        self._fetch_quotes()
diff --git a/stockmind/ui/main_window.py b/stockmind/ui/main_window.py
new file mode 100644
index 0000000..c0e5e27
--- /dev/null
+++ b/stockmind/ui/main_window.py
@@ -0,0 +1,236 @@
+from __future__ import annotations
+import os
+from PyQt6.QtWidgets import (
+    QMainWindow, QWidget, QHBoxLayout, QVBoxLayout,
+    QLabel, QPushButton, QStackedWidget, QSizePolicy, QStatusBar,
+    QApplication
+)
+from PyQt6.QtCore import Qt, QTimer, pyqtSignal
+from PyQt6.QtGui import QFont, QIcon
+
+NAV_ITEMS = [
+    ("dashboard", "⊞", "Dashboard"),
+    ("chart", "📈", "Chart"),
+    ("watchlist", "★", "Watchlist"),
+    ("portfolio", "💼", "Portfolio"),
+    ("ai", "✦", "AI"),
+    ("news", "📰", "News"),
+    ("screener", "⚙", "Screener"),
+    ("settings", "⚙", "Settings"),
+]
+
+
+class SidebarButton(QPushButton):
+    def __init__(self, icon_text: str, tooltip: str, parent=None):
+        super().__init__(icon_text, parent)
+        self.setCheckable(True)
+        self.setFixedSize(44, 44)
+        self.setToolTip(tooltip)
+        self.setFont(QFont("Segoe UI Emoji", 14))
+
+
+class MainWindow(QMainWindow):
+    def __init__(self, config):
+        super().__init__()
+        self._config = config
+        self._nav_buttons: dict[str, SidebarButton] = {}
+        self._alert_worker = None
+        self._setup_status_bar()
+        self._setup_ui()
+        self._start_alerts()
+
+    def _setup_ui(self):
+        self.setWindowTitle("StockMind")
+        self.setMinimumSize(1200, 700)
+        self.resize(1440, 860)
+
+        central = QWidget()
+        self.setCentralWidget(central)
+        layout = QHBoxLayout(central)
+        layout.setContentsMargins(0, 0, 0, 0)
+        layout.setSpacing(0)
+
+        # Sidebar
+        sidebar = self._build_sidebar()
+        layout.addWidget(sidebar)
+
+        # Content stack
+        self._stack = QStackedWidget()
+        layout.addWidget(self._stack)
+
+        self._build_pages()
+        self._set_page("dashboard")
+
+    def _build_sidebar(self) -> QWidget:
+        sidebar = QWidget()
+        sidebar.setObjectName("sidebar")
+        sidebar.setFixedWidth(56)
+        sb_layout = QVBoxLayout(sidebar)
+        sb_layout.setContentsMargins(6, 8, 6, 8)
+        sb_layout.setSpacing(4)
+        sb_layout.setAlignment(Qt.AlignmentFlag.AlignTop)
+
+        logo = QLabel("S")
+        logo.setObjectName("logo_label")
+        logo.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        sb_layout.addWidget(logo)
+        sb_layout.addSpacing(8)
+
+        icons = {
+            "dashboard": "⊞",
+            "chart": "📈",
+            "watchlist": "★",
+            "portfolio": "💼",
+            "ai": "✦",
+            "news": "📰",
+            "screener": "🔍",
+        }
+        labels = {
+            "dashboard": "Dashboard",
+            "chart": "Chart",
+            "watchlist": "Watchlist",
+            "portfolio": "Portfolio",
+            "ai": "AI",
+            "news": "News",
+            "screener": "Screener",
+        }
+
+        for page_id, icon in icons.items():
+            btn = SidebarButton(icon, labels[page_id])
+            btn.clicked.connect(lambda checked, pid=page_id: self._set_page(pid))
+            self._nav_buttons[page_id] = btn
+            sb_layout.addWidget(btn)
+
+        sb_layout.addStretch()
+
+        # Theme toggle
+        self._theme_btn = SidebarButton("☀", "Toggle Theme")
+        self._theme_btn.setCheckable(False)
+        self._theme_btn.clicked.connect(self._toggle_theme)
+        sb_layout.addWidget(self._theme_btn)
+
+        # Settings
+        settings_btn = SidebarButton("⚙", "Settings")
+        settings_btn.setCheckable(False)
+        settings_btn.clicked.connect(self._open_settings)
+        sb_layout.addWidget(settings_btn)
+
+        return sidebar
+
+    def _build_pages(self):
+        from ui.dashboard_widget import DashboardWidget
+        from ui.chart_widget import ChartWidget
+        from ui.watchlist_widget import WatchlistWidget
+        from ui.portfolio_widget import PortfolioWidget
+        from ui.ai_panel import AIPanelWidget
+        from ui.news_widget import NewsWidget
+        from ui.screener_widget import ScreenerWidget
+
+        self._dashboard = DashboardWidget()
+        self._chart = ChartWidget()
+        self._watchlist = WatchlistWidget()
+        self._portfolio = PortfolioWidget(self._config)
+        self._ai_panel = AIPanelWidget(self._config)
+        self._news = NewsWidget(self._config)
+        self._screener = ScreenerWidget()
+
+        pages = [
+            ("dashboard", self._dashboard),
+            ("chart", self._chart),
+            ("watchlist", self._watchlist),
+            ("portfolio", self._portfolio),
+            ("ai", self._ai_panel),
+            ("news", self._news),
+            ("screener", self._screener),
+        ]
+        self._page_indices: dict[str, int] = {}
+        for page_id, widget in pages:
+            idx = self._stack.addWidget(widget)
+            self._page_indices[page_id] = idx
+
+        # Wire cross-widget signals
+        self._dashboard.symbol_selected.connect(self._navigate_to_chart)
+        self._watchlist.symbol_selected.connect(self._navigate_to_chart)
+        self._portfolio.symbol_selected.connect(self._navigate_to_chart)
+        self._screener.symbol_selected.connect(self._navigate_to_chart)
+        self._screener.add_to_watchlist.connect(lambda s: self._watchlist.add_symbol_external(s))
+        self._chart.symbol_changed.connect(self._on_symbol_changed)
+
+    def _set_page(self, page_id: str):
+        for pid, btn in self._nav_buttons.items():
+            btn.setChecked(pid == page_id)
+        if page_id in self._page_indices:
+            self._stack.setCurrentIndex(self._page_indices[page_id])
+        self._status_page_label.setText(page_id.capitalize())
+
+    def _navigate_to_chart(self, symbol: str):
+        self._chart.load_symbol(symbol)
+        self._set_page("chart")
+
+    def _on_symbol_changed(self, symbol: str):
+        self._ai_panel.set_symbol(symbol)
+        self._news.set_symbol(symbol)
+
+    def _toggle_theme(self):
+        current = self._config.get_setting("theme", "dark")
+        new_theme = "light" if current == "dark" else "dark"
+        self._config.set_setting("theme", new_theme)
+        self._apply_theme(new_theme)
+        self._theme_btn.setText("☀" if new_theme == "dark" else "🌙")
+
+    def _apply_theme(self, theme: str):
+        base_dir = os.path.dirname(os.path.dirname(__file__))
+        path = os.path.join(base_dir, "assets", "styles", f"{theme}.qss")
+        if os.path.exists(path):
+            with open(path, "r") as f:
+                QApplication.instance().setStyleSheet(f.read())
+
+    def _open_settings(self):
+        from ui.settings_dialog import SettingsDialog
+        dlg = SettingsDialog(self._config, self)
+        dlg.exec()
+
+    def _start_alerts(self):
+        from core.alerts import AlertWorker
+        self._alert_worker = AlertWorker(interval_seconds=300)
+        self._alert_worker.alert_triggered.connect(self._on_alert_triggered)
+        self._alert_worker.start()
+
+    def _on_alert_triggered(self, symbol: str, alert_type: str, message: str):
+        self.statusBar().showMessage(f"⚡ Alert: {message}", 10000)
+
+    def _setup_status_bar(self):
+        sb = self.statusBar()
+        self._status_page_label = QLabel("Dashboard")
+        self._status_page_label.setObjectName("subtitle")
+        sb.addWidget(self._status_page_label)
+
+        self._market_status_label = QLabel()
+        self._market_status_label.setObjectName("subtitle")
+        sb.addPermanentWidget(self._market_status_label)
+        self._update_market_status()
+
+        timer = QTimer(self)
+        timer.timeout.connect(self._update_market_status)
+        timer.start(60_000)
+
+    def _update_market_status(self):
+        from datetime import datetime, timezone
+        import zoneinfo
+        try:
+            et = zoneinfo.ZoneInfo("America/New_York")
+            now_et = datetime.now(et)
+            weekday = now_et.weekday()
+            hour = now_et.hour
+            minute = now_et.minute
+            is_market_hours = (weekday < 5) and (9 * 60 + 30 <= hour * 60 + minute < 16 * 60)
+            status = "🟢 Market Open" if is_market_hours else "🔴 Market Closed"
+            self._market_status_label.setText(status)
+        except Exception:
+            self._market_status_label.setText("")
+
+    def closeEvent(self, event):
+        if self._alert_worker:
+            self._alert_worker.stop()
+            self._alert_worker.wait(2000)
+        super().closeEvent(event)
diff --git a/stockmind/ui/news_widget.py b/stockmind/ui/news_widget.py
new file mode 100644
index 0000000..de38d7b
--- /dev/null
+++ b/stockmind/ui/news_widget.py
@@ -0,0 +1,227 @@
+from __future__ import annotations
+from PyQt6.QtWidgets import (
+    QWidget, QVBoxLayout, QHBoxLayout, QLabel, QPushButton,
+    QListWidget, QListWidgetItem, QFrame, QProgressBar, QSizePolicy
+)
+from PyQt6.QtCore import Qt, QThread, pyqtSignal, QUrl
+from PyQt6.QtGui import QColor, QFont, QDesktopServices
+from utils.formatters import pnl_color
+
+SENTIMENT_COLORS = {
+    "BULLISH": "#a6e3a1",
+    "BEARISH": "#f38ba8",
+    "NEUTRAL": "#6c7086",
+    "": "#6c7086",
+}
+
+
+class NewsWorker(QThread):
+    articles_ready = pyqtSignal(list)
+    error = pyqtSignal(str)
+
+    def __init__(self, symbol: str, api_key: str, analyze: bool, claude_client=None):
+        super().__init__()
+        self._symbol = symbol
+        self._api_key = api_key
+        self._analyze = analyze
+        self._claude = claude_client
+
+    def run(self):
+        try:
+            from ai.sentiment import fetch_news, analyze_sentiment, cache_news, get_cached_news
+
+            cached = get_cached_news(self._symbol)
+            if cached:
+                self.articles_ready.emit(cached)
+                return
+
+            articles = fetch_news(self._symbol, self._api_key)
+            if not articles:
+                self.articles_ready.emit([])
+                return
+
+            overall_sentiment = ""
+            if self._analyze and self._claude and articles:
+                try:
+                    sentiment_text, _ = analyze_sentiment(self._symbol, articles, self._claude)
+                    if "BULLISH" in sentiment_text:
+                        overall_sentiment = "BULLISH"
+                    elif "BEARISH" in sentiment_text:
+                        overall_sentiment = "BEARISH"
+                    else:
+                        overall_sentiment = "NEUTRAL"
+                    for a in articles:
+                        a["sentiment"] = overall_sentiment
+                except Exception:
+                    pass
+
+            cache_news(self._symbol, articles, overall_sentiment)
+            self.articles_ready.emit(articles)
+        except Exception as e:
+            self.error.emit(str(e))
+
+
+class NewsItemWidget(QFrame):
+    def __init__(self, article: dict, parent=None):
+        super().__init__(parent)
+        self.setObjectName("card")
+        self.setCursor(Qt.CursorShape.PointingHandCursor)
+        self._url = article.get("url", "")
+
+        layout = QVBoxLayout(self)
+        layout.setContentsMargins(10, 8, 10, 8)
+        layout.setSpacing(4)
+
+        top = QHBoxLayout()
+        title = QLabel(article.get("title", ""))
+        title.setWordWrap(True)
+        title.setFont(QFont("Segoe UI", 9, QFont.Weight.Bold))
+        top.addWidget(title, stretch=1)
+
+        sentiment = article.get("sentiment", "")
+        if sentiment:
+            badge = QLabel(f" {sentiment} ")
+            badge_color = SENTIMENT_COLORS.get(sentiment.upper(), "#6c7086")
+            badge.setStyleSheet(f"background: {badge_color}; color: #1e1e2e; border-radius: 4px; padding: 1px 4px; font-size: 8pt; font-weight: bold;")
+            badge.setSizePolicy(QSizePolicy.Policy.Fixed, QSizePolicy.Policy.Fixed)
+            top.addWidget(badge)
+        layout.addLayout(top)
+
+        meta = QLabel(f"{article.get('source', '')}  ·  {article.get('published_at', '')[:10]}")
+        meta.setObjectName("subtitle")
+        layout.addWidget(meta)
+
+        desc = article.get("description", "")
+        if desc:
+            desc_label = QLabel(desc[:200] + ("…" if len(desc) > 200 else ""))
+            desc_label.setWordWrap(True)
+            desc_label.setObjectName("subtitle")
+            layout.addWidget(desc_label)
+
+    def mousePressEvent(self, event):
+        if self._url:
+            QDesktopServices.openUrl(QUrl(self._url))
+        super().mousePressEvent(event)
+
+
+class NewsWidget(QWidget):
+    def __init__(self, config, parent=None):
+        super().__init__(parent)
+        self._config = config
+        self._symbol = "AAPL"
+        self._worker: NewsWorker | None = None
+        self._setup_ui()
+
+    def _setup_ui(self):
+        root = QVBoxLayout(self)
+        root.setContentsMargins(12, 12, 12, 12)
+        root.setSpacing(8)
+
+        header_row = QHBoxLayout()
+        header = QLabel("News & Sentiment")
+        header.setObjectName("title")
+        header_row.addWidget(header)
+        header_row.addStretch()
+
+        self._symbol_label = QLabel(self._symbol)
+        self._symbol_label.setObjectName("subtitle")
+        header_row.addWidget(self._symbol_label)
+
+        self._fetch_btn = QPushButton("Fetch News")
+        self._fetch_btn.setObjectName("primary_btn")
+        self._fetch_btn.clicked.connect(self._fetch_news)
+        header_row.addWidget(self._fetch_btn)
+        root.addLayout(header_row)
+
+        # Sentiment gauge row
+        self._sentiment_frame = QFrame()
+        self._sentiment_frame.setObjectName("card")
+        self._sentiment_frame.setMaximumHeight(60)
+        sent_layout = QHBoxLayout(self._sentiment_frame)
+        self._overall_label = QLabel("Overall Sentiment: —")
+        self._overall_label.setFont(QFont("Segoe UI", 11, QFont.Weight.Bold))
+        self._gauge = QProgressBar()
+        self._gauge.setRange(0, 100)
+        self._gauge.setValue(50)
+        self._gauge.setMaximumWidth(200)
+        self._gauge.setFormat("")
+        sent_layout.addWidget(self._overall_label)
+        sent_layout.addStretch()
+        sent_layout.addWidget(QLabel("Bearish"))
+        sent_layout.addWidget(self._gauge)
+        sent_layout.addWidget(QLabel("Bullish"))
+        root.addWidget(self._sentiment_frame)
+
+        # Articles scroll area
+        from PyQt6.QtWidgets import QScrollArea
+        scroll = QScrollArea()
+        scroll.setWidgetResizable(True)
+        scroll.setFrameShape(QFrame.Shape.NoFrame)
+
+        self._articles_widget = QWidget()
+        self._articles_layout = QVBoxLayout(self._articles_widget)
+        self._articles_layout.setSpacing(8)
+        self._articles_layout.setContentsMargins(0, 0, 0, 0)
+        self._articles_layout.addStretch()
+        scroll.setWidget(self._articles_widget)
+        root.addWidget(scroll)
+
+        self._status_label = QLabel("")
+        self._status_label.setObjectName("subtitle")
+        root.addWidget(self._status_label)
+
+    def set_symbol(self, symbol: str):
+        self._symbol = symbol
+        self._symbol_label.setText(symbol)
+
+    def _fetch_news(self):
+        api_key = self._config.news_api_key
+        if not api_key:
+            self._status_label.setText("NewsAPI key not configured. Go to Settings.")
+            return
+
+        self._fetch_btn.setEnabled(False)
+        self._status_label.setText(f"Fetching news for {self._symbol}…")
+
+        claude = None
+        if self._config.anthropic_key:
+            try:
+                from ai.claude_client import ClaudeClient
+                claude = ClaudeClient(self._config.anthropic_key)
+            except Exception:
+                pass
+
+        self._worker = NewsWorker(self._symbol, api_key, analyze=bool(claude), claude_client=claude)
+        self._worker.articles_ready.connect(self._on_articles_ready)
+        self._worker.error.connect(lambda e: (self._status_label.setText(f"Error: {e}"), self._fetch_btn.setEnabled(True)))
+        self._worker.start()
+
+    def _on_articles_ready(self, articles: list[dict]):
+        # Clear existing articles
+        while self._articles_layout.count() > 1:
+            item = self._articles_layout.takeAt(0)
+            if item.widget():
+                item.widget().deleteLater()
+
+        for article in articles:
+            widget = NewsItemWidget(article)
+            self._articles_layout.insertWidget(self._articles_layout.count() - 1, widget)
+
+        # Update sentiment gauge
+        sentiments = [a.get("sentiment", "").upper() for a in articles if a.get("sentiment")]
+        if sentiments:
+            bullish = sentiments.count("BULLISH")
+            bearish = sentiments.count("BEARISH")
+            total = len(sentiments)
+            score = int((bullish / total) * 100) if total else 50
+            self._gauge.setValue(score)
+            dominant = "BULLISH" if bullish > bearish else ("BEARISH" if bearish > bullish else "NEUTRAL")
+            color = SENTIMENT_COLORS.get(dominant, "#6c7086")
+            self._overall_label.setText(f"Overall: {dominant}")
+            self._overall_label.setStyleSheet(f"color: {color};")
+        else:
+            self._gauge.setValue(50)
+            self._overall_label.setText("Overall Sentiment: —")
+
+        self._status_label.setText(f"{len(articles)} articles  |  100 req/day limit applies")
+        self._fetch_btn.setEnabled(True)
diff --git a/stockmind/ui/portfolio_widget.py b/stockmind/ui/portfolio_widget.py
new file mode 100644
index 0000000..821f1f5
--- /dev/null
+++ b/stockmind/ui/portfolio_widget.py
@@ -0,0 +1,313 @@
+from __future__ import annotations
+import math
+from PyQt6.QtWidgets import (
+    QWidget, QVBoxLayout, QHBoxLayout, QLabel, QPushButton, QTableWidget,
+    QTableWidgetItem, QTabWidget, QSplitter, QFrame, QMessageBox,
+    QDialog, QFormLayout, QLineEdit, QDialogButtonBox, QDoubleSpinBox, QSizePolicy
+)
+from PyQt6.QtCore import Qt, QThread, pyqtSignal, QRectF
+from PyQt6.QtGui import QColor, QPainter, QBrush, QPen, QFont
+from utils.formatters import fmt_currency, fmt_percent, fmt_large_number, pnl_color
+
+
+class SyncWorker(QThread):
+    positions_ready = pyqtSignal(list, object)
+    error = pyqtSignal(str)
+
+    def __init__(self, broker):
+        super().__init__()
+        self._broker = broker
+
+    def run(self):
+        try:
+            positions = self._broker.get_positions()
+            balance = self._broker.get_balance()
+            self.positions_ready.emit(positions, balance)
+        except Exception as e:
+            self.error.emit(str(e))
+
+
+class PieChartWidget(QWidget):
+    def __init__(self, data: dict[str, float] | None = None, parent=None):
+        super().__init__(parent)
+        self._data = data or {}
+        self.setMinimumSize(220, 220)
+        self.setSizePolicy(QSizePolicy.Policy.Expanding, QSizePolicy.Policy.Expanding)
+
+    def set_data(self, data: dict[str, float]):
+        self._data = data
+        self.update()
+
+    def paintEvent(self, event):
+        if not self._data:
+            return
+        painter = QPainter(self)
+        painter.setRenderHint(QPainter.RenderHint.Antialiasing)
+
+        w, h = self.width(), self.height()
+        margin = 40
+        side = min(w - margin * 2, h - margin * 2)
+        x = (w - side) // 2
+        y = (h - side) // 2
+        rect = QRectF(x, y, side, side)
+
+        palette = ["#89b4fa", "#a6e3a1", "#f38ba8", "#fab387", "#cba6f7",
+                   "#f9e2af", "#89dceb", "#94e2d5", "#b4befe", "#eba0ac"]
+
+        total = sum(self._data.values())
+        if total == 0:
+            return
+
+        angle = 0.0
+        items = sorted(self._data.items(), key=lambda x: -x[1])
+        for i, (label, value) in enumerate(items):
+            span = value / total * 360 * 16
+            color = QColor(palette[i % len(palette)])
+            painter.setBrush(QBrush(color))
+            painter.setPen(QPen(QColor("#1e1e2e"), 2))
+            painter.drawPie(rect, int(angle), int(span))
+            angle += span
+
+        # Legend
+        legend_x = 8
+        legend_y = 8
+        painter.setFont(QFont("Segoe UI", 8))
+        for i, (label, value) in enumerate(items[:8]):
+            color = QColor(palette[i % len(palette)])
+            painter.setBrush(QBrush(color))
+            painter.setPen(Qt.PenStyle.NoPen)
+            painter.drawRect(legend_x, legend_y + i * 16, 10, 10)
+            painter.setPen(QPen(QColor("#cdd6f4")))
+            painter.drawText(legend_x + 14, legend_y + i * 16 + 9,
+                             f"{label[:14]}  {value:.1f}%")
+
+
+class AddPositionDialog(QDialog):
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        self.setWindowTitle("Add Position")
+        self.setMinimumWidth(300)
+        layout = QFormLayout(self)
+
+        self.symbol_input = QLineEdit()
+        self.symbol_input.setPlaceholderText("e.g. AAPL")
+        self.shares_input = QDoubleSpinBox()
+        self.shares_input.setRange(0.0001, 1_000_000)
+        self.shares_input.setDecimals(4)
+        self.cost_input = QDoubleSpinBox()
+        self.cost_input.setRange(0.0, 1_000_000)
+        self.cost_input.setDecimals(2)
+        self.cost_input.setPrefix("$")
+
+        layout.addRow("Symbol:", self.symbol_input)
+        layout.addRow("Shares:", self.shares_input)
+        layout.addRow("Avg Cost/Share:", self.cost_input)
+
+        buttons = QDialogButtonBox(QDialogButtonBox.StandardButton.Ok | QDialogButtonBox.StandardButton.Cancel)
+        buttons.accepted.connect(self.accept)
+        buttons.rejected.connect(self.reject)
+        layout.addRow(buttons)
+
+
+class PortfolioWidget(QWidget):
+    symbol_selected = pyqtSignal(str)
+
+    def __init__(self, config, parent=None):
+        super().__init__(parent)
+        self._config = config
+        self._positions: list[dict] = []
+        self._worker: SyncWorker | None = None
+        self._setup_ui()
+        self._load_manual_positions()
+
+    def _setup_ui(self):
+        root = QVBoxLayout(self)
+        root.setContentsMargins(12, 12, 12, 12)
+        root.setSpacing(8)
+
+        header_row = QHBoxLayout()
+        header = QLabel("Portfolio")
+        header.setObjectName("title")
+        header_row.addWidget(header)
+        header_row.addStretch()
+
+        schwab_btn = QPushButton("Sync Schwab")
+        schwab_btn.clicked.connect(self._sync_schwab)
+        rh_btn = QPushButton("Sync Robinhood")
+        rh_btn.clicked.connect(self._sync_robinhood)
+        add_btn = QPushButton("+ Add Manual")
+        add_btn.setObjectName("primary_btn")
+        add_btn.clicked.connect(self._add_manual)
+
+        for btn in (schwab_btn, rh_btn, add_btn):
+            header_row.addWidget(btn)
+        root.addLayout(header_row)
+
+        # Balance summary
+        self._balance_frame = QFrame()
+        self._balance_frame.setObjectName("card")
+        bal_layout = QHBoxLayout(self._balance_frame)
+        self._equity_label = QLabel("Total Equity\n—")
+        self._cash_label = QLabel("Cash\n—")
+        self._bp_label = QLabel("Buying Power\n—")
+        self._day_pnl_label = QLabel("Day P&L\n—")
+        for lbl in (self._equity_label, self._cash_label, self._bp_label, self._day_pnl_label):
+            lbl.setAlignment(Qt.AlignmentFlag.AlignCenter)
+            lbl.setFont(QFont("Segoe UI", 9))
+            bal_layout.addWidget(lbl)
+        root.addWidget(self._balance_frame)
+
+        # Holdings table + pie chart
+        splitter = QSplitter(Qt.Orientation.Horizontal)
+
+        self._table = QTableWidget()
+        self._table.setColumnCount(7)
+        self._table.setHorizontalHeaderLabels(["Symbol", "Shares", "Avg Cost", "Price", "Value", "P&L $", "P&L %"])
+        self._table.setAlternatingRowColors(True)
+        self._table.setSelectionBehavior(QTableWidget.SelectionBehavior.SelectRows)
+        self._table.horizontalHeader().setStretchLastSection(True)
+        self._table.doubleClicked.connect(self._on_row_double_click)
+        splitter.addWidget(self._table)
+
+        self._pie_chart = PieChartWidget()
+        splitter.addWidget(self._pie_chart)
+        splitter.setSizes([700, 250])
+        root.addWidget(splitter)
+
+        self._status_label = QLabel("")
+        self._status_label.setObjectName("subtitle")
+        root.addWidget(self._status_label)
+
+    def _load_manual_positions(self):
+        from db.database import get_session
+        from db.models import PortfolioPosition
+        from core.market_data import get_batch_quotes
+        from core.portfolio import calculate_pnl
+
+        with get_session() as session:
+            rows = session.query(PortfolioPosition).all()
+            raw = [{"symbol": r.symbol, "shares": r.shares, "avg_cost": r.avg_cost, "broker": r.broker} for r in rows]
+
+        if raw:
+            quotes = get_batch_quotes([r["symbol"] for r in raw])
+            self._positions = calculate_pnl(raw, quotes)
+        else:
+            self._positions = []
+        self._render_table()
+
+    def _render_table(self):
+        self._table.setRowCount(len(self._positions))
+        total_value = 0.0
+        sector_alloc: dict[str, float] = {}
+
+        for row, pos in enumerate(self._positions):
+            symbol = pos.get("symbol", "")
+            items = [
+                symbol,
+                f"{pos.get('shares', 0):.4f}",
+                fmt_currency(pos.get("avg_cost", 0)),
+                fmt_currency(pos.get("price", 0)),
+                fmt_currency(pos.get("market_value", 0)),
+                fmt_currency(pos.get("pnl", 0)),
+                fmt_percent(pos.get("pnl_pct", 0), plus=True),
+            ]
+            for col, text in enumerate(items):
+                cell = QTableWidgetItem(text)
+                cell.setTextAlignment(Qt.AlignmentFlag.AlignRight | Qt.AlignmentFlag.AlignVCenter)
+                if col == 0:
+                    cell.setTextAlignment(Qt.AlignmentFlag.AlignLeft | Qt.AlignmentFlag.AlignVCenter)
+                if col in (5, 6):
+                    pnl = pos.get("pnl", 0)
+                    cell.setForeground(QColor(pnl_color(pnl)))
+                self._table.setItem(row, col, cell)
+
+            mv = pos.get("market_value", 0)
+            total_value += mv
+            sector = pos.get("sector", "Unknown") or "Unknown"
+            sector_alloc[sector] = sector_alloc.get(sector, 0) + mv
+
+        if total_value > 0:
+            sector_pct = {s: v / total_value * 100 for s, v in sector_alloc.items()}
+            self._pie_chart.set_data(sector_pct)
+
+        self._status_label.setText(f"Total Value: {fmt_currency(total_value)}  |  {len(self._positions)} positions")
+
+    def _update_balance(self, balance):
+        self._equity_label.setText(f"Total Equity\n{fmt_currency(balance.total_equity)}")
+        self._cash_label.setText(f"Cash\n{fmt_currency(balance.cash)}")
+        self._bp_label.setText(f"Buying Power\n{fmt_currency(balance.buying_power)}")
+        day_pnl = balance.day_pnl
+        color = pnl_color(day_pnl)
+        self._day_pnl_label.setText(f"Day P&L\n{fmt_currency(day_pnl)}")
+        self._day_pnl_label.setStyleSheet(f"color: {color};")
+
+    def _sync_schwab(self):
+        from brokers.schwab import SchwabBroker
+        key = self._config.schwab_app_key
+        secret = self._config.schwab_app_secret
+        if not key or not secret:
+            QMessageBox.warning(self, "Schwab", "Schwab API keys not configured. Go to Settings.")
+            return
+        try:
+            broker = SchwabBroker(key, secret)
+            broker.connect()
+            self._status_label.setText("Syncing Schwab…")
+            self._worker = SyncWorker(broker)
+            self._worker.positions_ready.connect(self._on_broker_sync)
+            self._worker.error.connect(lambda e: QMessageBox.critical(self, "Schwab Error", e))
+            self._worker.start()
+        except Exception as e:
+            QMessageBox.critical(self, "Schwab Error", str(e))
+
+    def _sync_robinhood(self):
+        from brokers.robinhood import RobinhoodBroker
+        user = self._config.robinhood_username
+        pwd = self._config.robinhood_password
+        if not user or not pwd:
+            QMessageBox.warning(self, "Robinhood", "Robinhood credentials not configured. Go to Settings.")
+            return
+        try:
+            broker = RobinhoodBroker(user, pwd)
+            broker.connect()
+            self._status_label.setText("Syncing Robinhood…")
+            self._worker = SyncWorker(broker)
+            self._worker.positions_ready.connect(self._on_broker_sync)
+            self._worker.error.connect(lambda e: QMessageBox.critical(self, "Robinhood Error", e))
+            self._worker.start()
+        except Exception as e:
+            QMessageBox.critical(self, "Robinhood Error", str(e))
+
+    def _on_broker_sync(self, positions, balance):
+        from core.market_data import get_batch_quotes
+        from core.portfolio import calculate_pnl
+        raw = [{"symbol": p.symbol, "shares": p.shares, "avg_cost": p.avg_cost, "broker": "broker"} for p in positions]
+        quotes = get_batch_quotes([p.symbol for p in positions])
+        self._positions = calculate_pnl(raw, quotes)
+        self._render_table()
+        self._update_balance(balance)
+
+    def _add_manual(self):
+        dlg = AddPositionDialog(self)
+        if dlg.exec() == QDialog.DialogCode.Accepted:
+            symbol = dlg.symbol_input.text().strip().upper()
+            shares = dlg.shares_input.value()
+            avg_cost = dlg.cost_input.value()
+            if symbol and shares > 0:
+                from db.database import get_session
+                from db.models import PortfolioPosition
+                with get_session() as session:
+                    existing = session.query(PortfolioPosition).filter_by(symbol=symbol, broker="manual").first()
+                    if existing:
+                        existing.shares = shares
+                        existing.avg_cost = avg_cost
+                    else:
+                        session.add(PortfolioPosition(symbol=symbol, shares=shares, avg_cost=avg_cost))
+                    session.commit()
+                self._load_manual_positions()
+
+    def _on_row_double_click(self, index):
+        row = index.row()
+        if row < len(self._positions):
+            symbol = self._positions[row].get("symbol", "")
+            if symbol:
+                self.symbol_selected.emit(symbol)
diff --git a/stockmind/ui/screener_widget.py b/stockmind/ui/screener_widget.py
new file mode 100644
index 0000000..52bedbc
--- /dev/null
+++ b/stockmind/ui/screener_widget.py
@@ -0,0 +1,262 @@
+from __future__ import annotations
+from PyQt6.QtWidgets import (
+    QWidget, QVBoxLayout, QHBoxLayout, QLabel, QPushButton, QTableWidget,
+    QTableWidgetItem, QDoubleSpinBox, QComboBox, QGroupBox, QFormLayout,
+    QCheckBox, QProgressBar, QMenu
+)
+from PyQt6.QtCore import Qt, QThread, pyqtSignal
+from PyQt6.QtGui import QColor
+from utils.formatters import fmt_currency, fmt_percent, fmt_large_number, pnl_color
+
+SECTORS = ["All", "Technology", "Healthcare", "Financials", "Consumer Cyclical",
+           "Communication Services", "Industrials", "Consumer Defensive",
+           "Energy", "Basic Materials", "Real Estate", "Utilities", "Crypto"]
+
+
+class ScreenerWorker(QThread):
+    data_ready = pyqtSignal(list)
+    progress = pyqtSignal(int)
+    error = pyqtSignal(str)
+
+    def __init__(self, filters: dict):
+        super().__init__()
+        self._filters = filters
+
+    def run(self):
+        try:
+            from core.market_data import get_screener_data, SCREENER_UNIVERSE
+            raw = get_screener_data(SCREENER_UNIVERSE)
+            self.progress.emit(80)
+            filtered = self._apply_filters(raw)
+            self.data_ready.emit(filtered)
+        except Exception as e:
+            self.error.emit(str(e))
+
+    def _apply_filters(self, data: list[dict]) -> list[dict]:
+        f = self._filters
+        result = []
+        for row in data:
+            if f.get("sector") and f["sector"] != "All":
+                if row.get("sector", "") != f["sector"]:
+                    continue
+
+            if row.get("pe_ratio") is not None:
+                pe = row["pe_ratio"]
+                if f.get("pe_min") and pe < f["pe_min"]:
+                    continue
+                if f.get("pe_max") and pe > f["pe_max"]:
+                    continue
+
+            if row.get("market_cap") is not None:
+                mc = row["market_cap"]
+                if f.get("mc_min") and mc < f["mc_min"] * 1e9:
+                    continue
+                if f.get("mc_max") and mc > f["mc_max"] * 1e9:
+                    continue
+
+            if row.get("rsi") is not None:
+                rsi = row["rsi"]
+                if f.get("rsi_min") and rsi < f["rsi_min"]:
+                    continue
+                if f.get("rsi_max") and rsi > f["rsi_max"]:
+                    continue
+
+            if row.get("pct_from_52h") is not None:
+                pct = row["pct_from_52h"]
+                if f.get("from_52h_min") and pct < f["from_52h_min"]:
+                    continue
+                if f.get("from_52h_max") and pct > f["from_52h_max"]:
+                    continue
+
+            result.append(row)
+        return result
+
+
+class ScreenerWidget(QWidget):
+    symbol_selected = pyqtSignal(str)
+    add_to_watchlist = pyqtSignal(str)
+
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        self._worker: ScreenerWorker | None = None
+        self._results: list[dict] = []
+        self._setup_ui()
+
+    def _setup_ui(self):
+        root = QVBoxLayout(self)
+        root.setContentsMargins(12, 12, 12, 12)
+        root.setSpacing(10)
+
+        header = QLabel("Stock Screener")
+        header.setObjectName("title")
+        root.addWidget(header)
+
+        # Filters
+        filters_box = QGroupBox("Filters")
+        filters_layout = QHBoxLayout(filters_box)
+
+        # Sector
+        sector_form = QFormLayout()
+        self._sector_combo = QComboBox()
+        self._sector_combo.addItems(SECTORS)
+        sector_form.addRow("Sector:", self._sector_combo)
+        filters_layout.addLayout(sector_form)
+
+        # PE
+        pe_form = QFormLayout()
+        self._pe_min = QDoubleSpinBox()
+        self._pe_min.setRange(0, 10000)
+        self._pe_min.setSpecialValueText("—")
+        self._pe_max = QDoubleSpinBox()
+        self._pe_max.setRange(0, 10000)
+        self._pe_max.setSpecialValueText("—")
+        pe_form.addRow("P/E Min:", self._pe_min)
+        pe_form.addRow("P/E Max:", self._pe_max)
+        filters_layout.addLayout(pe_form)
+
+        # Market Cap
+        mc_form = QFormLayout()
+        self._mc_min = QDoubleSpinBox()
+        self._mc_min.setRange(0, 100000)
+        self._mc_min.setSuffix("B")
+        self._mc_min.setSpecialValueText("—")
+        self._mc_max = QDoubleSpinBox()
+        self._mc_max.setRange(0, 100000)
+        self._mc_max.setSuffix("B")
+        self._mc_max.setSpecialValueText("—")
+        mc_form.addRow("MCap Min:", self._mc_min)
+        mc_form.addRow("MCap Max:", self._mc_max)
+        filters_layout.addLayout(mc_form)
+
+        # RSI
+        rsi_form = QFormLayout()
+        self._rsi_min = QDoubleSpinBox()
+        self._rsi_min.setRange(0, 100)
+        self._rsi_min.setSpecialValueText("—")
+        self._rsi_max = QDoubleSpinBox()
+        self._rsi_max.setRange(0, 100)
+        self._rsi_max.setValue(100)
+        rsi_form.addRow("RSI Min:", self._rsi_min)
+        rsi_form.addRow("RSI Max:", self._rsi_max)
+        filters_layout.addLayout(rsi_form)
+
+        # 52W
+        week_form = QFormLayout()
+        self._from_52h_min = QDoubleSpinBox()
+        self._from_52h_min.setRange(-100, 0)
+        self._from_52h_min.setSpecialValueText("—")
+        self._from_52h_min.setSuffix("%")
+        self._from_52h_max = QDoubleSpinBox()
+        self._from_52h_max.setRange(-100, 100)
+        self._from_52h_max.setSpecialValueText("—")
+        self._from_52h_max.setSuffix("%")
+        week_form.addRow("% from 52H min:", self._from_52h_min)
+        week_form.addRow("% from 52H max:", self._from_52h_max)
+        filters_layout.addLayout(week_form)
+
+        root.addWidget(filters_box)
+
+        # Run button + progress
+        btn_row = QHBoxLayout()
+        self._run_btn = QPushButton("Run Screener")
+        self._run_btn.setObjectName("primary_btn")
+        self._run_btn.clicked.connect(self._run_screener)
+        self._progress = QProgressBar()
+        self._progress.setMaximumWidth(200)
+        self._progress.hide()
+        btn_row.addWidget(self._run_btn)
+        btn_row.addWidget(self._progress)
+        btn_row.addStretch()
+        self._result_label = QLabel("")
+        self._result_label.setObjectName("subtitle")
+        btn_row.addWidget(self._result_label)
+        root.addLayout(btn_row)
+
+        # Results table
+        self._table = QTableWidget()
+        self._table.setColumnCount(8)
+        self._table.setHorizontalHeaderLabels(["Symbol", "Name", "Price", "Sector", "MCap", "P/E", "RSI", "% from 52H"])
+        self._table.setAlternatingRowColors(True)
+        self._table.setSelectionBehavior(QTableWidget.SelectionBehavior.SelectRows)
+        self._table.horizontalHeader().setStretchLastSection(True)
+        self._table.doubleClicked.connect(self._on_row_double_click)
+        self._table.setContextMenuPolicy(Qt.ContextMenuPolicy.CustomContextMenu)
+        self._table.customContextMenuRequested.connect(self._show_context_menu)
+        root.addWidget(self._table)
+
+    def _run_screener(self):
+        if self._worker and self._worker.isRunning():
+            return
+        self._run_btn.setEnabled(False)
+        self._progress.setValue(0)
+        self._progress.show()
+        self._result_label.setText("Scanning…")
+
+        filters = {
+            "sector": self._sector_combo.currentText(),
+            "pe_min": self._pe_min.value() or None,
+            "pe_max": self._pe_max.value() or None,
+            "mc_min": self._mc_min.value() or None,
+            "mc_max": self._mc_max.value() or None,
+            "rsi_min": self._rsi_min.value() or None,
+            "rsi_max": self._rsi_max.value() if self._rsi_max.value() < 100 else None,
+            "from_52h_min": self._from_52h_min.value() or None,
+            "from_52h_max": self._from_52h_max.value() or None,
+        }
+
+        self._worker = ScreenerWorker(filters)
+        self._worker.data_ready.connect(self._on_results)
+        self._worker.progress.connect(self._progress.setValue)
+        self._worker.error.connect(lambda e: (
+            self._result_label.setText(f"Error: {e}"),
+            self._run_btn.setEnabled(True),
+            self._progress.hide(),
+        ))
+        self._worker.start()
+
+    def _on_results(self, results: list[dict]):
+        self._results = results
+        self._table.setRowCount(len(results))
+        for row, r in enumerate(results):
+            pct_52h = r.get("pct_from_52h")
+            items_data = [
+                (r.get("symbol", ""), Qt.AlignmentFlag.AlignLeft),
+                (r.get("name", "")[:30], Qt.AlignmentFlag.AlignLeft),
+                (fmt_currency(r.get("price")), Qt.AlignmentFlag.AlignRight),
+                (r.get("sector", ""), Qt.AlignmentFlag.AlignLeft),
+                (fmt_large_number(r.get("market_cap")), Qt.AlignmentFlag.AlignRight),
+                (f"{r['pe_ratio']:.1f}" if r.get("pe_ratio") else "—", Qt.AlignmentFlag.AlignRight),
+                (f"{r['rsi']:.1f}" if r.get("rsi") else "—", Qt.AlignmentFlag.AlignRight),
+                (fmt_percent(pct_52h, plus=True) if pct_52h is not None else "—", Qt.AlignmentFlag.AlignRight),
+            ]
+            for col, (text, align) in enumerate(items_data):
+                cell = QTableWidgetItem(str(text))
+                cell.setTextAlignment(align | Qt.AlignmentFlag.AlignVCenter)
+                if col == 7 and pct_52h is not None:
+                    cell.setForeground(QColor(pnl_color(pct_52h)))
+                self._table.setItem(row, col, cell)
+
+        self._run_btn.setEnabled(True)
+        self._progress.hide()
+        self._result_label.setText(f"{len(results)} results")
+
+    def _on_row_double_click(self, index):
+        row = index.row()
+        if row < len(self._results):
+            sym = self._results[row].get("symbol", "")
+            if sym:
+                self.symbol_selected.emit(sym)
+
+    def _show_context_menu(self, pos):
+        row = self._table.rowAt(pos.y())
+        if row < 0 or row >= len(self._results):
+            return
+        sym = self._results[row].get("symbol", "")
+        menu = QMenu(self)
+        chart_action = menu.addAction(f"View Chart: {sym}")
+        watch_action = menu.addAction("Add to Watchlist")
+        action = menu.exec(self._table.mapToGlobal(pos))
+        if action == chart_action:
+            self.symbol_selected.emit(sym)
+        elif action == watch_action:
+            self.add_to_watchlist.emit(sym)
diff --git a/stockmind/ui/settings_dialog.py b/stockmind/ui/settings_dialog.py
new file mode 100644
index 0000000..02827cc
--- /dev/null
+++ b/stockmind/ui/settings_dialog.py
@@ -0,0 +1,216 @@
+from __future__ import annotations
+from PyQt6.QtWidgets import (
+    QDialog, QVBoxLayout, QHBoxLayout, QLabel, QLineEdit, QPushButton,
+    QTabWidget, QWidget, QFormLayout, QGroupBox, QMessageBox, QCheckBox
+)
+from PyQt6.QtCore import Qt
+from PyQt6.QtGui import QFont
+
+
+class SettingsDialog(QDialog):
+    def __init__(self, config, parent=None):
+        super().__init__(parent)
+        self._config = config
+        self.setWindowTitle("Settings")
+        self.setMinimumWidth(480)
+        self.setMinimumHeight(440)
+        self._setup_ui()
+        self._load_values()
+
+    def _setup_ui(self):
+        root = QVBoxLayout(self)
+        root.setContentsMargins(16, 16, 16, 16)
+        root.setSpacing(12)
+
+        tabs = QTabWidget()
+        tabs.addTab(self._build_api_tab(), "API Keys")
+        tabs.addTab(self._build_brokers_tab(), "Brokers")
+        tabs.addTab(self._build_general_tab(), "General")
+        root.addWidget(tabs)
+
+        btn_row = QHBoxLayout()
+        btn_row.addStretch()
+        save_btn = QPushButton("Save")
+        save_btn.setObjectName("primary_btn")
+        save_btn.clicked.connect(self._save)
+        cancel_btn = QPushButton("Cancel")
+        cancel_btn.clicked.connect(self.reject)
+        btn_row.addWidget(cancel_btn)
+        btn_row.addWidget(save_btn)
+        root.addLayout(btn_row)
+
+    def _build_api_tab(self) -> QWidget:
+        tab = QWidget()
+        layout = QVBoxLayout(tab)
+        layout.setContentsMargins(8, 8, 8, 8)
+        layout.setSpacing(12)
+
+        # Anthropic
+        anthropic_box = QGroupBox("Anthropic (Claude AI)")
+        anthropic_form = QFormLayout(anthropic_box)
+        self._anthropic_key = QLineEdit()
+        self._anthropic_key.setEchoMode(QLineEdit.EchoMode.Password)
+        self._anthropic_key.setPlaceholderText("sk-ant-…")
+        test_anthropic = QPushButton("Test")
+        test_anthropic.setMaximumWidth(60)
+        test_anthropic.clicked.connect(self._test_anthropic)
+        row = QHBoxLayout()
+        row.addWidget(self._anthropic_key)
+        row.addWidget(test_anthropic)
+        anthropic_form.addRow("API Key:", row)
+        anthropic_form.addRow("", QLabel("Get key: console.anthropic.com  |  Pay per token"))
+        layout.addWidget(anthropic_box)
+
+        # NewsAPI
+        news_box = QGroupBox("NewsAPI")
+        news_form = QFormLayout(news_box)
+        self._news_key = QLineEdit()
+        self._news_key.setEchoMode(QLineEdit.EchoMode.Password)
+        self._news_key.setPlaceholderText("Your NewsAPI key…")
+        test_news = QPushButton("Test")
+        test_news.setMaximumWidth(60)
+        test_news.clicked.connect(self._test_news)
+        row2 = QHBoxLayout()
+        row2.addWidget(self._news_key)
+        row2.addWidget(test_news)
+        news_form.addRow("API Key:", row2)
+        news_form.addRow("", QLabel("Get key: newsapi.org  |  100 req/day free"))
+        layout.addWidget(news_box)
+        layout.addStretch()
+        return tab
+
+    def _build_brokers_tab(self) -> QWidget:
+        tab = QWidget()
+        layout = QVBoxLayout(tab)
+        layout.setContentsMargins(8, 8, 8, 8)
+        layout.setSpacing(12)
+
+        # Schwab
+        schwab_box = QGroupBox("Charles Schwab")
+        schwab_form = QFormLayout(schwab_box)
+        self._schwab_key = QLineEdit()
+        self._schwab_key.setPlaceholderText("App Key…")
+        self._schwab_secret = QLineEdit()
+        self._schwab_secret.setEchoMode(QLineEdit.EchoMode.Password)
+        self._schwab_secret.setPlaceholderText("App Secret…")
+        test_schwab = QPushButton("Test Connection")
+        test_schwab.clicked.connect(self._test_schwab)
+        schwab_form.addRow("App Key:", self._schwab_key)
+        schwab_form.addRow("App Secret:", self._schwab_secret)
+        schwab_form.addRow("", test_schwab)
+        schwab_form.addRow("", QLabel("Register at: developer.schwab.com\nCallback URL: https://127.0.0.1"))
+        layout.addWidget(schwab_box)
+
+        # Robinhood
+        rh_box = QGroupBox("Robinhood")
+        rh_form = QFormLayout(rh_box)
+        self._rh_username = QLineEdit()
+        self._rh_username.setPlaceholderText("Email…")
+        self._rh_password = QLineEdit()
+        self._rh_password.setEchoMode(QLineEdit.EchoMode.Password)
+        self._rh_password.setPlaceholderText("Password…")
+        test_rh = QPushButton("Test Login")
+        test_rh.clicked.connect(self._test_robinhood)
+        rh_form.addRow("Username:", self._rh_username)
+        rh_form.addRow("Password:", self._rh_password)
+        rh_form.addRow("", test_rh)
+        layout.addWidget(rh_box)
+        layout.addStretch()
+        return tab
+
+    def _build_general_tab(self) -> QWidget:
+        tab = QWidget()
+        layout = QVBoxLayout(tab)
+        layout.setContentsMargins(8, 8, 8, 8)
+        layout.setSpacing(12)
+
+        general_box = QGroupBox("Appearance & Behavior")
+        general_form = QFormLayout(general_box)
+        self._theme_dark = QCheckBox("Dark theme")
+        self._theme_dark.setChecked(True)
+        general_form.addRow("Theme:", self._theme_dark)
+        layout.addWidget(general_box)
+        layout.addStretch()
+        return tab
+
+    def _load_values(self):
+        self._anthropic_key.setText(self._config.get_setting("anthropic_api_key") or self._config.get("ANTHROPIC_API_KEY"))
+        self._news_key.setText(self._config.get_setting("news_api_key") or self._config.get("NEWS_API_KEY"))
+        self._schwab_key.setText(self._config.get_setting("schwab_app_key") or self._config.get("SCHWAB_APP_KEY"))
+        self._schwab_secret.setText(self._config.get_setting("schwab_app_secret") or self._config.get("SCHWAB_APP_SECRET"))
+        self._rh_username.setText(self._config.get_setting("robinhood_username") or self._config.get("ROBINHOOD_USERNAME"))
+        self._rh_password.setText(self._config.get_setting("robinhood_password") or self._config.get("ROBINHOOD_PASSWORD"))
+        theme = self._config.get_setting("theme", "dark")
+        self._theme_dark.setChecked(theme == "dark")
+
+    def _save(self):
+        self._config.set_setting("anthropic_api_key", self._anthropic_key.text().strip())
+        self._config.set_setting("news_api_key", self._news_key.text().strip())
+        self._config.set_setting("schwab_app_key", self._schwab_key.text().strip())
+        self._config.set_setting("schwab_app_secret", self._schwab_secret.text().strip())
+        self._config.set_setting("robinhood_username", self._rh_username.text().strip())
+        self._config.set_setting("robinhood_password", self._rh_password.text().strip())
+        self._config.set_setting("theme", "dark" if self._theme_dark.isChecked() else "light")
+        QMessageBox.information(self, "Saved", "Settings saved. Restart to apply theme changes.")
+        self.accept()
+
+    def _test_anthropic(self):
+        key = self._anthropic_key.text().strip()
+        if not key:
+            QMessageBox.warning(self, "Test Failed", "Enter an API key first.")
+            return
+        try:
+            import anthropic
+            client = anthropic.Anthropic(api_key=key)
+            response = client.messages.create(
+                model="claude-haiku-4-5-20251001",
+                max_tokens=10,
+                messages=[{"role": "user", "content": "ping"}],
+            )
+            QMessageBox.information(self, "Success", "Anthropic API key is valid!")
+        except Exception as e:
+            QMessageBox.critical(self, "Test Failed", str(e))
+
+    def _test_news(self):
+        key = self._news_key.text().strip()
+        if not key:
+            QMessageBox.warning(self, "Test Failed", "Enter an API key first.")
+            return
+        try:
+            from newsapi import NewsApiClient
+            client = NewsApiClient(api_key=key)
+            result = client.get_top_headlines(language="en", page_size=1)
+            if result.get("status") == "ok":
+                QMessageBox.information(self, "Success", "NewsAPI key is valid!")
+            else:
+                QMessageBox.critical(self, "Test Failed", result.get("message", "Unknown error"))
+        except Exception as e:
+            QMessageBox.critical(self, "Test Failed", str(e))
+
+    def _test_schwab(self):
+        key = self._schwab_key.text().strip()
+        secret = self._schwab_secret.text().strip()
+        if not key or not secret:
+            QMessageBox.warning(self, "Test Failed", "Enter both App Key and Secret first.")
+            return
+        try:
+            from brokers.schwab import SchwabBroker
+            broker = SchwabBroker(key, secret)
+            broker.connect()
+            QMessageBox.information(self, "Success", "Schwab connected! Browser may open for OAuth if first time.")
+        except Exception as e:
+            QMessageBox.critical(self, "Test Failed", str(e))
+
+    def _test_robinhood(self):
+        user = self._rh_username.text().strip()
+        pwd = self._rh_password.text().strip()
+        if not user or not pwd:
+            QMessageBox.warning(self, "Test Failed", "Enter username and password first.")
+            return
+        try:
+            from brokers.robinhood import RobinhoodBroker
+            broker = RobinhoodBroker(user, pwd)
+            broker.connect()
+            QMessageBox.information(self, "Success", "Robinhood login successful!")
+        except Exception as e:
+            QMessageBox.critical(self, "Test Failed", str(e))
diff --git a/stockmind/ui/watchlist_widget.py b/stockmind/ui/watchlist_widget.py
new file mode 100644
index 0000000..ec400ae
--- /dev/null
+++ b/stockmind/ui/watchlist_widget.py
@@ -0,0 +1,197 @@
+from __future__ import annotations
+from PyQt6.QtWidgets import (
+    QWidget, QVBoxLayout, QHBoxLayout, QLabel, QLineEdit, QPushButton,
+    QTreeWidget, QTreeWidgetItem, QMenu, QInputDialog, QMessageBox, QComboBox
+)
+from PyQt6.QtCore import Qt, QThread, pyqtSignal, QTimer
+from PyQt6.QtGui import QColor, QFont
+from utils.formatters import fmt_currency, fmt_percent, pnl_color
+
+
+class WatchlistFetchWorker(QThread):
+    quotes_ready = pyqtSignal(dict)
+
+    def __init__(self, symbols: list[str]):
+        super().__init__()
+        self._symbols = symbols
+
+    def run(self):
+        from core.market_data import get_batch_quotes
+        self.quotes_ready.emit(get_batch_quotes(self._symbols))
+
+
+class WatchlistWidget(QWidget):
+    symbol_selected = pyqtSignal(str)
+
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        self._worker: WatchlistFetchWorker | None = None
+        self._setup_ui()
+        self._load_from_db()
+        self._start_timer()
+
+    def _setup_ui(self):
+        root = QVBoxLayout(self)
+        root.setContentsMargins(12, 12, 12, 12)
+        root.setSpacing(8)
+
+        header = QLabel("Watchlist")
+        header.setObjectName("title")
+        root.addWidget(header)
+
+        # Add symbol row
+        add_row = QHBoxLayout()
+        self._symbol_input = QLineEdit()
+        self._symbol_input.setPlaceholderText("Add symbol…")
+        self._symbol_input.returnPressed.connect(self._add_symbol)
+
+        self._group_combo = QComboBox()
+        self._group_combo.setEditable(True)
+        self._group_combo.addItems(["Default", "Tech", "Crypto", "ETFs"])
+        self._group_combo.setMaximumWidth(100)
+
+        add_btn = QPushButton("Add")
+        add_btn.setObjectName("primary_btn")
+        add_btn.clicked.connect(self._add_symbol)
+
+        add_row.addWidget(self._symbol_input)
+        add_row.addWidget(self._group_combo)
+        add_row.addWidget(add_btn)
+        root.addLayout(add_row)
+
+        # Tree
+        self._tree = QTreeWidget()
+        self._tree.setColumnCount(4)
+        self._tree.setHeaderLabels(["Symbol", "Price", "Change", "% Change"])
+        self._tree.header().setStretchLastSection(False)
+        self._tree.setColumnWidth(0, 120)
+        self._tree.setColumnWidth(1, 90)
+        self._tree.setColumnWidth(2, 80)
+        self._tree.setColumnWidth(3, 80)
+        self._tree.setAlternatingRowColors(True)
+        self._tree.itemDoubleClicked.connect(self._on_item_double_clicked)
+        self._tree.setContextMenuPolicy(Qt.ContextMenuPolicy.CustomContextMenu)
+        self._tree.customContextMenuRequested.connect(self._show_context_menu)
+        root.addWidget(self._tree)
+
+        self._status_label = QLabel("")
+        self._status_label.setObjectName("subtitle")
+        root.addWidget(self._status_label)
+
+    def _start_timer(self):
+        self._timer = QTimer(self)
+        self._timer.timeout.connect(self._refresh_quotes)
+        self._timer.start(60_000)
+
+    def _load_from_db(self):
+        from db.database import get_session
+        from db.models import WatchlistItem
+        self._tree.clear()
+        groups: dict[str, QTreeWidgetItem] = {}
+        with get_session() as session:
+            items = session.query(WatchlistItem).order_by(WatchlistItem.group_name).all()
+            for item in items:
+                group = item.group_name or "Default"
+                if group not in groups:
+                    group_item = QTreeWidgetItem([group])
+                    group_item.setFont(0, QFont("Segoe UI", 9, QFont.Weight.Bold))
+                    group_item.setForeground(0, QColor("#89b4fa"))
+                    self._tree.addTopLevelItem(group_item)
+                    group_item.setExpanded(True)
+                    groups[group] = group_item
+
+                child = QTreeWidgetItem([item.symbol, "—", "—", "—"])
+                child.setData(0, Qt.ItemDataRole.UserRole, item.symbol)
+                groups[group].addChild(child)
+
+        self._refresh_quotes()
+
+    def _refresh_quotes(self):
+        symbols = self._collect_symbols()
+        if not symbols or (self._worker and self._worker.isRunning()):
+            return
+        self._worker = WatchlistFetchWorker(symbols)
+        self._worker.quotes_ready.connect(self._apply_quotes)
+        self._worker.start()
+
+    def _collect_symbols(self) -> list[str]:
+        symbols = []
+        for i in range(self._tree.topLevelItemCount()):
+            group = self._tree.topLevelItem(i)
+            for j in range(group.childCount()):
+                sym = group.child(j).data(0, Qt.ItemDataRole.UserRole)
+                if sym:
+                    symbols.append(sym)
+        return symbols
+
+    def _apply_quotes(self, quotes: dict):
+        from datetime import datetime
+        for i in range(self._tree.topLevelItemCount()):
+            group = self._tree.topLevelItem(i)
+            for j in range(group.childCount()):
+                child = group.child(j)
+                sym = child.data(0, Qt.ItemDataRole.UserRole)
+                q = quotes.get(sym, {})
+                price = q.get("price", 0)
+                change = q.get("change", 0)
+                change_pct = q.get("change_pct", 0)
+                child.setText(1, fmt_currency(price))
+                child.setText(2, f"{'+' if change >= 0 else ''}{fmt_currency(change)}")
+                child.setText(3, fmt_percent(change_pct, plus=True))
+                color = QColor(pnl_color(change))
+                for col in (1, 2, 3):
+                    child.setForeground(col, color)
+        self._status_label.setText(f"Updated {datetime.now().strftime('%H:%M:%S')}")
+
+    def _add_symbol(self):
+        symbol = self._symbol_input.text().strip().upper()
+        group = self._group_combo.currentText().strip() or "Default"
+        if not symbol:
+            return
+        from db.database import get_session
+        from db.models import WatchlistItem
+        with get_session() as session:
+            existing = session.query(WatchlistItem).filter_by(symbol=symbol).first()
+            if existing:
+                return
+            session.add(WatchlistItem(symbol=symbol, group_name=group))
+            session.commit()
+        self._symbol_input.clear()
+        self._load_from_db()
+
+        if self._group_combo.findText(group) == -1:
+            self._group_combo.addItem(group)
+
+    def _on_item_double_clicked(self, item: QTreeWidgetItem, column: int):
+        sym = item.data(0, Qt.ItemDataRole.UserRole)
+        if sym:
+            self.symbol_selected.emit(sym)
+
+    def _show_context_menu(self, pos):
+        item = self._tree.itemAt(pos)
+        if not item or not item.data(0, Qt.ItemDataRole.UserRole):
+            return
+        sym = item.data(0, Qt.ItemDataRole.UserRole)
+        menu = QMenu(self)
+        view_action = menu.addAction(f"View Chart: {sym}")
+        remove_action = menu.addAction("Remove")
+        action = menu.exec(self._tree.mapToGlobal(pos))
+        if action == view_action:
+            self.symbol_selected.emit(sym)
+        elif action == remove_action:
+            self._remove_symbol(sym)
+
+    def _remove_symbol(self, symbol: str):
+        from db.database import get_session
+        from db.models import WatchlistItem
+        with get_session() as session:
+            session.query(WatchlistItem).filter_by(symbol=symbol).delete()
+            session.commit()
+        self._load_from_db()
+
+    def add_symbol_external(self, symbol: str, group: str = "Default"):
+        self._symbol_input.setText(symbol)
+        idx = self._group_combo.findText(group)
+        if idx >= 0:
+            self._group_combo.setCurrentIndex(idx)
+        self._add_symbol()
diff --git a/stockmind/utils/__init__.py b/stockmind/utils/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/stockmind/utils/config.py b/stockmind/utils/config.py
new file mode 100644
index 0000000..6f8b708
--- /dev/null
+++ b/stockmind/utils/config.py
@@ -0,0 +1,70 @@
+import os
+from pathlib import Path
+from dotenv import load_dotenv
+
+_env_loaded = False
+
+
+def _load_env():
+    global _env_loaded
+    if not _env_loaded:
+        env_path = Path(__file__).parent.parent.parent / ".env"
+        load_dotenv(env_path)
+        _env_loaded = True
+
+
+class Config:
+    def __init__(self):
+        _load_env()
+        self._db_session = None
+
+    def get(self, key: str, default: str = "") -> str:
+        _load_env()
+        return os.getenv(key, default)
+
+    def get_setting(self, key: str, default: str = "") -> str:
+        from db.database import get_session
+        from db.models import Setting
+        try:
+            with get_session() as session:
+                row = session.query(Setting).filter_by(key=key).first()
+                if row:
+                    return row.value
+        except Exception:
+            pass
+        return default
+
+    def set_setting(self, key: str, value: str) -> None:
+        from db.database import get_session
+        from db.models import Setting
+        with get_session() as session:
+            row = session.query(Setting).filter_by(key=key).first()
+            if row:
+                row.value = value
+            else:
+                session.add(Setting(key=key, value=value))
+            session.commit()
+
+    @property
+    def anthropic_key(self) -> str:
+        return self.get("ANTHROPIC_API_KEY") or self.get_setting("anthropic_api_key")
+
+    @property
+    def news_api_key(self) -> str:
+        return self.get("NEWS_API_KEY") or self.get_setting("news_api_key")
+
+    @property
+    def schwab_app_key(self) -> str:
+        return self.get("SCHWAB_APP_KEY") or self.get_setting("schwab_app_key")
+
+    @property
+    def schwab_app_secret(self) -> str:
+        return self.get("SCHWAB_APP_SECRET") or self.get_setting("schwab_app_secret")
+
+    @property
+    def robinhood_username(self) -> str:
+        return self.get("ROBINHOOD_USERNAME") or self.get_setting("robinhood_username")
+
+    @property
+    def robinhood_password(self) -> str:
+        return self.get("ROBINHOOD_PASSWORD") or self.get_setting("robinhood_password")
diff --git a/stockmind/utils/formatters.py b/stockmind/utils/formatters.py
new file mode 100644
index 0000000..5b80838
--- /dev/null
+++ b/stockmind/utils/formatters.py
@@ -0,0 +1,40 @@
+def fmt_currency(value: float, decimals: int = 2) -> str:
+    if value is None:
+        return "—"
+    sign = "-" if value < 0 else ""
+    return f"{sign}${abs(value):,.{decimals}f}"
+
+
+def fmt_percent(value: float, decimals: int = 2, plus: bool = True) -> str:
+    if value is None:
+        return "—"
+    sign = "+" if value > 0 and plus else ""
+    return f"{sign}{value:.{decimals}f}%"
+
+
+def fmt_large_number(value: float) -> str:
+    if value is None:
+        return "—"
+    abs_val = abs(value)
+    sign = "-" if value < 0 else ""
+    if abs_val >= 1_000_000_000_000:
+        return f"{sign}{abs_val / 1_000_000_000_000:.2f}T"
+    if abs_val >= 1_000_000_000:
+        return f"{sign}{abs_val / 1_000_000_000:.2f}B"
+    if abs_val >= 1_000_000:
+        return f"{sign}{abs_val / 1_000_000:.2f}M"
+    if abs_val >= 1_000:
+        return f"{sign}{abs_val / 1_000:.1f}K"
+    return f"{sign}{abs_val:.2f}"
+
+
+def fmt_volume(value: int) -> str:
+    return fmt_large_number(float(value)) if value else "—"
+
+
+def pnl_color(value: float) -> str:
+    if value > 0:
+        return "#a6e3a1"
+    if value < 0:
+        return "#f38ba8"
+    return "#cdd6f4"
diff --git a/stockmind/utils/notifications.py b/stockmind/utils/notifications.py
new file mode 100644
index 0000000..c46faa0
--- /dev/null
+++ b/stockmind/utils/notifications.py
@@ -0,0 +1,30 @@
+import threading
+
+
+def send_toast(title: str, message: str, duration: int = 5) -> None:
+    def _send():
+        try:
+            from win10toast import ToastNotifier
+            toaster = ToastNotifier()
+            toaster.show_toast(title, message, duration=duration, threaded=True)
+        except Exception:
+            try:
+                import subprocess
+                ps_script = (
+                    f"[Windows.UI.Notifications.ToastNotificationManager, Windows.UI.Notifications, "
+                    f"ContentType = WindowsRuntime] | Out-Null; "
+                    f"$template = [Windows.UI.Notifications.ToastNotificationManager]::GetTemplateContent("
+                    f"[Windows.UI.Notifications.ToastTemplateType]::ToastText02); "
+                    f"$template.SelectSingleNode('//text[@id=1]').InnerText = '{title}'; "
+                    f"$template.SelectSingleNode('//text[@id=2]').InnerText = '{message}'; "
+                    f"$notifier = [Windows.UI.Notifications.ToastNotificationManager]::CreateToastNotifier('StockMind'); "
+                    f"$notifier.Show([Windows.UI.Notifications.ToastNotification]::new($template))"
+                )
+                subprocess.Popen(
+                    ["powershell", "-WindowStyle", "Hidden", "-Command", ps_script],
+                    creationflags=0x08000000,
+                )
+            except Exception:
+                pass
+
+    threading.Thread(target=_send, daemon=True).start()