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/tifalockhartff7amarantsguise_illu_dwnsty_000008.json

@@ -0,0 +1,34 @@
+{
+  "outfit_id": "tifalockhartff7amarantsguise_illu_dwnsty_000008",
+  "outfit_name": "Cosplay - Tifa Amarant",
+  "wardrobe": {
+    "full_body": "red vest and white pants",
+    "headwear": "",
+    "top": "red vest, sleeveless, midriff",
+    "bottom": "white pants",
+    "legwear": "",
+    "footwear": "",
+    "hands": "red gloves, fingerless gloves",
+    "accessories": "jewelry, bangle"
+  },
+  "lora": {
+    "lora_name": "Illustrious/Clothing/TifaLockhartFF7AmarantsGuise_Illu_Dwnsty-000008.safetensors",
+    "lora_weight": 0.8,
+    "lora_weight_min": 0.8,
+    "lora_weight_max": 0.8,
+    "lora_triggers": "amarants guise, amarantstflckhrt"
+  },
+  "tags": [
+    "tifa_lockhart",
+    "final_fantasy_vii:_ever_crisis",
+    "red_vest",
+    "white_pants",
+    "midriff",
+    "navel",
+    "red_gloves",
+    "fingerless_gloves",
+    "sleeveless",
+    "jewelry",
+    "bangle"
+  ]
+}