🐛 Fix all Gitea v1.26 deprecated config settings 🐛

Resolve all deprecation warnings emitted at runtime by updating
app.ini to use current key names and locations.
- rootfs/tmp/etc/gitea/app.ini: move X_FRAME_OPTIONS from [cors] to [security] (deprecatedSetting v1.26.0)
- rootfs/tmp/etc/gitea/app.ini: remove [picture].DISABLE_GRAVATAR (deprecatedSettingDB since v1.18, use admin panel)
- rootfs/tmp/etc/gitea/app.ini: remove [picture].ENABLE_FEDERATED_AVATAR (deprecatedSettingDB since v1.18, use admin panel)
- rootfs/tmp/etc/gitea/app.ini: rename [lfs].LFS_CONTENT_PATH → PATH (was silently ignored; correct key is PATH)
- rootfs/tmp/etc/gitea/app.ini: rename [git].MAX_GIT_DIFF_LINE_CHARACTER_COUNT → MAX_GIT_DIFF_LINE_CHARACTERS (correct struct field name)
- rootfs/tmp/etc/gitea/app.ini: remove LOG_ROTATE/DAILY_ROTATE/MAX_DAYS from [log] root section (only valid in file-writer sub-sections; dead config with MODE=console)

.claude/settings.local.json
rootfs/tmp/etc/gitea/app.ini

.claude/settings.local.json

@@ -1,7 +1,8 @@
 {
   "permissions": {
     "allow": [
-      "Bash(script-lint *)"
+      "Bash(script-lint *)",
+      "WebFetch(domain:docs.gitea.com)"
     ]
   }
 }