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/idolswimsuitil_1665226.json

@@ -1,28 +0,0 @@
-{
-  "outfit_id": "idolswimsuitil_1665226",
-  "outfit_name": "Idolswimsuitil 1665226",
-  "wardrobe": {
-    "full_body": "bikini",
-    "headwear": "",
-    "top": "bandeau",
-    "bottom": "high-waist_bottom",
-    "legwear": "",
-    "footwear": "",
-    "hands": "",
-    "accessories": ""
-  },
-  "lora": {
-    "lora_name": "Illustrious/Clothing/IdolSwimsuitIL_1665226.safetensors",
-    "lora_weight": 1.0,
-    "lora_triggers": "Jedpslb",
-    "lora_weight_min": 1.0,
-    "lora_weight_max": 1.0
-  },
-  "tags": [
-    "pastel_colors",
-    "high-waist_bikini",
-    "strapless",
-    "bare_shoulders",
-    "navel"
-  ]
-}