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/characters/aisha_clan_clan.json

@@ -0,0 +1,49 @@
+{
+  "character_id": "aisha_clan_clan",
+  "character_name": "Aisha Clan-Clan",
+  "identity": {
+    "base_specs": "1girl, dark_skin, toned, fangs,  facial_mark",
+    "hair": "white_hair, long ears, single_braid, ring_hair_ornament, cat_ears, ",
+    "eyes": "aqua_eyes",
+    "hands": "claws",
+    "arms": "",
+    "torso": "abs, medium breasts",
+    "pelvis": "cat_tail,",
+    "legs": "",
+    "feet": "",
+    "extra": " circlet"
+  },
+  "defaults": {
+    "expression": "grin",
+    "pose": "flexing bicep",
+    "scene": "space station"
+  },
+  "wardrobe": {
+    "full_body": "off-shoulder_dress, two-tone_dress",
+    "headwear": "circlet, ring_hair_ornament",
+    "top": "neck_bell,white_collar, long_sleeves, cleavage",
+    "bottom": " black_belt,",
+    "legwear": "black_pantyhose, thigh_strap",
+    "footwear": "",
+    "hands": "bracelets",
+    "accessories": ""
+  },
+  "styles": {
+    "aesthetic": "retro anime, outlaw_star",
+    "primary_color": "white",
+    "secondary_color": "green",
+    "tertiary_color": "black"
+  },
+  "lora": {
+    "lora_name": "Illustrious/Looks/Hoseki_OutlawStar_AishaClanClan_IllustriousXL_v1.safetensors",
+    "lora_weight": 1.0,
+    "lora_weight_min": 0.7,
+    "lora_weight_max": 1.0,
+    "lora_triggers": "ashcln"
+  },
+  "tags": [
+    "aisha_clanclan",
+    "outlaw_star",
+    "90's"
+  ]
+}