04/23 Fixed bugs

views/ai_summary_view.py

@@ -851,17 +851,32 @@ def _read_doc(path: str) -> str:
 
 
 def _read_excel(path: str) -> str:
+    """
+    Extract text from an Excel file via openpyxl (read-only mode).
+    Iteration stops as soon as accumulated content exceeds MAX_CHARS_PER_FILE
+    to avoid loading the entire workbook into memory for very large files.
+    The AI layer will truncate to MAX_CHARS_PER_FILE anyway, so there is no
+    value in continuing past that point.
+    """
+    MAX_CHARS_PER_FILE = 14_000   # mirror the constant in AiSummaryView._run_ai
     try:
         import openpyxl
         wb = openpyxl.load_workbook(path, read_only=True, data_only=True)
         lines = []
+        total_chars = 0
         for sheet in wb.worksheets:
-            lines.append(f"[Sheet: {sheet.title}]")
+            header = f"[Sheet: {sheet.title}]"
+            lines.append(header)
+            total_chars += len(header) + 1
             for row in sheet.iter_rows(values_only=True):
                 row_str = "\t".join(
                     str(v) if v is not None else "" for v in row)
                 if row_str.strip():
                     lines.append(row_str)
+                    total_chars += len(row_str) + 1
+                    if total_chars >= MAX_CHARS_PER_FILE:
+                        lines.append("[... content truncated to fit token limit ...]")
+                        return "\n".join(lines)
         return "\n".join(lines)
     except ImportError:
         raise ImportError(