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>

fix_quotes.py

@@ -0,0 +1,17 @@
+import glob
+import re
+
+files = glob.glob('templates/*/detail.html') + ['templates/detail.html']
+
+for filepath in files:
+    with open(filepath, 'r') as f:
+        content = f.read()
+
+    # remove literal backslashes before single quotes
+    content = content.replace(r"\'", "'")
+    
+    # remove literal backslashes before double quotes if any
+    content = content.replace(r'\"', '"')
+
+    with open(filepath, 'w') as f:
+        f.write(content)