defluff (frontend + backend): strip em-dashes + shorten docstrings + drop dead UI files (cosmetic only, no schedule code)

frontend/src/types/electron.d.ts

@@ -46,9 +46,7 @@ declare global {
     onUpdateError: (cb: (message: string) => void) => () => void;
     onWebviewNewWindow: (cb: (url: string, webContentsId: number) => void) => () => void;
     openExternal: (url: string) => Promise<void>;
-    // Deep-link listener — fires when OS opens the app with openswarm://... URL.
     onAuthUrl?: (cb: (url: string) => void) => () => void;
-    // OAuth claim deep-link listener — fires for openswarm://oauth/{provider}/complete.
     onOauthClaim?: (cb: (url: string) => void) => () => void;
   }