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/cageddemonsunderbustdressill.json

@@ -2,9 +2,9 @@
   "outfit_id": "cageddemonsunderbustdressill",
   "outfit_name": "Cageddemonsunderbustdressill",
   "wardrobe": {
-    "full_body": "latex_dress, underbust",
+    "full_body": "latex_dress",
     "headwear": "",
-    "top": "pasties",
+    "top": "pasties, underbust",
     "bottom": "",
     "legwear": "",
     "footwear": "",
@@ -15,7 +15,7 @@
     "lora_name": "Illustrious/Clothing/CagedDemonsUnderbustDressILL.safetensors",
     "lora_weight": 0.8,
     "lora_triggers": "CagedDemonsUnderbustDressILL",
-    "lora_weight_min": 0.8,
+    "lora_weight_min": 0.2,
     "lora_weight_max": 0.8
   },
   "tags": [