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/giantess_missionary_000037.json

@@ -2,15 +2,15 @@
   "action_id": "giantess_missionary_000037",
   "action_name": "Giantess Missionary 000037",
   "action": {
-    "full_body": "missionary, lying, on_back, size_difference, giantess, larger_female",
+    "full_body": "1boy, 1girl, shota, onee-shota, missionary, lying, on_back, size_difference, giantess, larger_female, clothed female naked male",
     "head": "face_between_breasts, burying_face",
-    "eyes": "closed_eyes, expressionless",
-    "arms": "hug, arms_around_back",
+    "eyes": "closed_eyes, ",
+    "arms": "hug, hand on anothers head",
     "hands": "hands_on_back",
-    "torso": "breasts, cleavage, large_breasts",
+    "torso": "cleavage,",
     "pelvis": "hops",
     "legs": "spread_legs, legs_up",
-    "feet": "barefoot",
+    "feet": "",
     "additional": "male_on_top, hetero, bearhug, femdom"
   },
   "lora": {
@@ -22,7 +22,6 @@
   },
   "tags": [
     "missionary",
-    "giantess",
     "size_difference",
     "larger_female",
     "face_between_breasts",
@@ -32,4 +31,4 @@
     "on_back",
     "cleavage"
   ]
-}
+}