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/actions/cheekbulge.json

@@ -3,7 +3,7 @@
   "action_name": "Cheekbulge",
   "action": {
     "full_body": "fellatio",
-    "head": "cheek_bulge, head_tilt, saliva",
+    "head": "cheek_bulge, head_tilt, saliva, penis in mouth, fellatio",
     "eyes": "looking_up",
     "arms": "arms_behind_back",
     "hands": "hands_on_head",
@@ -16,7 +16,7 @@
   "lora": {
     "lora_name": "Illustrious/Poses/cheekbulge.safetensors",
     "lora_weight": 1.0,
-    "lora_triggers": "cheek bulge",
+    "lora_triggers": "cheek bulge, male pov",
     "lora_weight_min": 1.0,
     "lora_weight_max": 1.0
   },
@@ -29,4 +29,4 @@
     "penis",
     "pov"
   ]
-}
+}