feat(config): reorganize settings window and move annotation colors to subtitleStyle

- Reorganize Configuration window into Appearance, Behavior, Anki, Input, and Integration sections
- Add AnkiConnect-backed deck, note-type, and field pickers in the Anki section
- Add click-to-learn keybinding controls
- Move known-word and N+1 highlight colors to subtitleStyle.knownWordColor / subtitleStyle.nPlusOneColor; legacy ankiConnect.knownWords.color and ankiConnect.nPlusOne.nPlusOne keys still accepted with deprecation warnings
- Add deckNames, modelNames, modelFieldNames, and fieldNamesForDeck methods to AnkiConnectClient
- Mark discordPresence.presenceStyle as an enum in the config registry

src/main/runtime/config-settings-save.ts

@@ -23,7 +23,6 @@ export interface ConfigSettingsSaveDeps {
   deleteFile?(path: string): void;
   reloadConfigStrict(): ReloadConfigStrictResult;
   classifyDiff(prev: ResolvedConfig, next: ResolvedConfig): ConfigSettingsHotReloadDiff;
-  applyHotReload(diff: ConfigSettingsHotReloadDiff, config: ResolvedConfig): void;
   getRestartRequiredSections(restartRequiredFields: string[]): string[];
 }
 
@@ -64,12 +63,17 @@ export function createSaveConfigSettingsPatchHandler(deps: ConfigSettingsSaveDep
     deps.writeTextAtomically(configPath, candidate.content);
     const reloadResult = deps.reloadConfigStrict();
     if (!reloadResult.ok) {
-      if (hadExistingConfig) {
-        deps.writeTextAtomically(configPath, content);
-      } else if (deps.deleteFile) {
-        deps.deleteFile(configPath);
-      } else {
-        deps.writeTextAtomically(configPath, content);
+      try {
+        if (hadExistingConfig) {
+          deps.writeTextAtomically(configPath, content);
+        } else if (deps.deleteFile) {
+          deps.deleteFile(configPath);
+        } else {
+          deps.writeTextAtomically(configPath, content);
+        }
+        deps.reloadConfigStrict();
+      } catch {
+        // Best-effort rollback; preserve original reload error for caller.
       }
       return {
         ok: false,
@@ -82,9 +86,6 @@ export function createSaveConfigSettingsPatchHandler(deps: ConfigSettingsSaveDep
     }
 
     const diff = deps.classifyDiff(previousConfig, reloadResult.config);
-    if (diff.hotReloadFields.length > 0) {
-      deps.applyHotReload(diff, reloadResult.config);
-    }
 
     return {
       ok: true,