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/laceskimpyleotardill.json

@@ -1,12 +1,12 @@
 {
   "outfit_id": "laceskimpyleotardill",
-  "outfit_name": "Laceskimpyleotardill",
+  "outfit_name": "Lingerie - Lace Leotard",
   "wardrobe": {
-    "full_body": "leotard",
-    "headwear": "blindfold",
+    "full_body": "lace leotard",
+    "headwear": "",
     "top": "",
     "bottom": "",
-    "legwear": "fishnet_thighhighs",
+    "legwear": "lace stockings",
     "footwear": "",
     "hands": "",
     "accessories": ""
@@ -23,4 +23,4 @@
     "lingerie",
     "clothing_cutout"
   ]
-}
+}