05/23 Phase 7

CLAUDE.md

@@ -307,16 +307,21 @@ All actions are logged to console and optionally to a log file:
 
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-### 🔲 Phase 7 — Export + Polish
-- [ ] Add export to Excel (`openpyxl`) for:
-  - [ ] Draw history
-  - [ ] Predictions
-  - [ ] Frequency analysis
-- [ ] Add export to CSV
-- [ ] Add `assets/icon.png`
-- [ ] App title bar + icon
-- [ ] Window min-size + resizable layout
-- [ ] Error handling — network down, API timeout, bad CSV
+### ✅ Phase 7 — Export + Polish
+- [x] Write `core/exporter.py`
+  - [x] `export_draws_excel(filepath, game_id, date_from, date_to)` — openpyxl, styled header
+  - [x] `export_draws_csv(filepath, game_id, date_from, date_to)` — stdlib csv
+  - [x] `export_predictions_excel(filepath, game_id)` — openpyxl
+  - [x] `export_predictions_csv(filepath, game_id)` — stdlib csv
+  - [x] `export_frequency_excel(filepath, game_id, last_n)` — number + freq + gap
+  - [x] `create_icon_png(path, size)` — valid PNG, stdlib only (struct + zlib)
+- [x] Add Export Excel + Export CSV buttons to History screen (filter-aware)
+- [x] Add Export Excel + Export CSV buttons to Predictor screen (DB predictions)
+- [x] Add Export Frequency button to Analysis screen (respects frequency window)
+- [x] Auto-create `assets/icon.png` on startup if missing
+- [x] Window min-size set (900×600) + resizable layout (all screens)
+- [x] Error handling — try/except + messagebox.showerror on all export paths
+- [x] 27 tests for exporter (165/165 total passing)
 
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