fix: Fix YAML syntax errors and validator prompt formatting

- Fix YAML files with unquoted strings containing quotes
- Export singleton instances in ai/__init__.py
- Fix validator scoring prompt to use replace() instead of format()
  to avoid conflicts with JSON curly braces

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.claude/settings.local.json

@@ -27,7 +27,18 @@
       "Bash(tee:*)",
       "Bash(systemctl start:*)",
       "Bash(systemctl enable:*)",
-      "Bash(systemctl is-enabled:*)"
+      "Bash(systemctl is-enabled:*)",
+      "Bash(for f in dashboard/templates/*.html)",
+      "Bash(do)",
+      "Bash(if grep -q \"extends \"\"base.html\"\"\" \"$f\")",
+      "Bash(then)",
+      "Bash(echo:*)",
+      "Bash(else)",
+      "Bash(fi)",
+      "Bash(done)",
+      "Bash(xargs basename:*)",
+      "Bash(docker-compose down:*)",
+      "Bash(for:*)"
     ]
   }
 }