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/goth_girl_ill.json

@@ -2,13 +2,13 @@
   "outfit_id": "goth_girl_ill",
   "outfit_name": "Goth Girl Ill",
   "wardrobe": {
-    "full_body": "",
-    "headwear": "hood",
+    "full_body": "goth",
+    "headwear": "",
     "top": "corset",
-    "bottom": "skirt",
-    "legwear": "thighhighs",
-    "footwear": "",
-    "hands": "",
+    "bottom": "lace skirt",
+    "legwear": "fishnet pantyhose",
+    "footwear": "lace up boots",
+    "hands": "fishnet elbow gloves",
     "accessories": "choker, jewelry"
   },
   "lora": {
@@ -23,7 +23,6 @@
     "makeup",
     "black_lips",
     "black_nails",
-    "eyeshadow",
-    "pale_skin"
+    "eyeshadow"
   ]
-}
+}