Plugin System

interface Plugin {
  name: string;
  displayName?: Record<string, string>;  // i18n display name
  version: string;
  description?: string;
  homepage?: string;
  defaultSettings?: Record<string, any>;
  commentHandler?: 'none' | 'ai' | 'visitor' | 'both';
  hooks: {
    onServerInit?: (ctx: ServerContext) => void | Promise<void>;
    beforeGenerate?: (ctx: PluginHookContext) => PluginHookContext;
    afterGenerate?: (ctx: PluginHookContext) => PluginHookContext;
    pageReady?: (ctx: PluginHookContext) => PluginHookContext;
    beforeRender?: (ctx: PluginHookContext) => PluginHookContext;
    onFetchComments?: (ctx: FetchContext) => FetchContext;
    onCommentSubmit?: (ctx: SubmitContext) => SubmitContext;
  };
}

1. onServerInit     — Plugin starts, registers routes, timers
2. beforeGenerate   — Modify page content before AI generation
3. afterGenerate    — Post-generation processing
4. pageReady        — All providers finished for a page
5. onFetchComments  — Add visitor/fedi comments to widget response
6. onCommentSubmit  — Handle visitor comment submission
7. beforeRender     — Pre-render transformation