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/looks/faceless_ugly_bastardv1il_000014.json

@@ -1,24 +1,19 @@
 {
   "look_id": "faceless_ugly_bastardv1il_000014",
   "look_name": "Faceless Ugly Bastardv1Il 000014",
-  "character_id": "",
-  "positive": "ugly_bastard, faceless_male, shaded_face, old_man, fat_man, obese, big_belly, smug",
-  "negative": "handsome, bishounen, muscular, thin, visible_face",
+  "character_id": null,
+  "positive": "1boy, (faceless_male:1.5),, fat_man, oji-san, male out of frame,",
+  "negative": "handsome, bishounen, muscular, thin, visible male face",
   "lora": {
     "lora_name": "Illustrious/Looks/Faceless-Ugly-BastardV1IL-000014.safetensors",
     "lora_weight": 0.8,
-    "lora_triggers": "UBV1F",
-    "lora_weight_min": 0.8,
-    "lora_weight_max": 0.8
+    "lora_triggers": "UBV1F, faceless_male",
+    "lora_weight_min": 1.0,
+    "lora_weight_max": 1.0
   },
   "tags": [
     "ugly_bastard",
     "faceless_male",
-    "shaded_face",
-    "old_man",
-    "fat_man",
-    "obese",
-    "big_belly",
-    "smug"
+    "fat_man"
   ]
-}
+}