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/before_after_1230829.json

@@ -1,24 +1,24 @@
 {
+  "action": {
+    "additional": "cum, close-uo",
+    "arms": "",
+    "eyes": "eyes_closed",
+    "feet": "",
+    "full_body": "2koma, before and after, side-by-side",
+    "hands": "",
+    "head": "sticky_face,facial, bukkake, cum_on_face",
+    "legs": "",
+    "pelvis": "",
+    "torso": ""
+  },
   "action_id": "before_after_1230829",
   "action_name": "Before After 1230829",
-  "action": {
-    "full_body": "2koma, before_and_after",
-    "head": "heavy_breathing, orgasm, sticky_face",
-    "eyes": "eyes_closed",
-    "arms": "variation",
-    "hands": "variation",
-    "torso": "upper_body",
-    "pelvis": "variation",
-    "legs": "variation",
-    "feet": "variation",
-    "additional": "facial, bukkake, cum, cum_on_face"
-  },
   "lora": {
     "lora_name": "Illustrious/Poses/before_after_1230829.safetensors",
-    "lora_weight": 0.9,
     "lora_triggers": "before_after",
-    "lora_weight_min": 0.9,
-    "lora_weight_max": 0.9
+    "lora_weight": 0.9,
+    "lora_weight_max": 0.7,
+    "lora_weight_min": 0.6
   },
   "tags": [
     "before_and_after",