Add extra prompts, endless generation, random character default, and small fixes

- Add extra positive/negative prompt textareas to all 9 detail pages with session persistence
- Add Endless generation button to all detail pages (continuous preview generation until stopped)
- Default character selector to "Random Character" on all secondary detail pages
- Fix queue clear endpoint (remove spurious auth check)
- Refactor app.py into routes/ and services/ modules
- Update CLAUDE.md with new architecture documentation
- Various data file updates and cleanup

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

data/clothing/bitch_illustrious_v1_0.json

@@ -7,7 +7,7 @@
     "lora_weight_max": 0.8
   },
   "outfit_id": "bitch_illustrious_v1_0",
-  "outfit_name": "Bitch Illustrious V1 0",
+  "outfit_name": "Gyaru - Bitch Style",
   "tags": [
     "gyaru",
     "jewelry",
@@ -25,4 +25,4 @@
     "legwear": "",
     "top": ""
   }
-}
+}