feat(terminal): open .md file links in built-in markdown viewer (#45)

* feat(terminal): add clickable file path links

File paths in terminal output are now highlighted and clickable.
Supports absolute, relative, bare, and @Scoped paths with :line:col
suffixes. Trailing punctuation is stripped. An onFileLink callback
prop allows parent components to handle specific file types.

* feat(terminal): open .md file links in built-in markdown viewer

Clicking a .md file link in the terminal opens it in a resizable
markdown viewer dialog with syntax highlighting. Cmd+click opens
the file externally instead. Non-.md files always open externally.

---------

Co-authored-by: maskar <Maskar@users.noreply.github.com>

Author: maskar

electron/ipc/channels.ts

@@ -98,6 +98,10 @@ export enum IPC {
   // System
   GetSystemFonts = 'get_system_fonts',
 
+  // File links
+  OpenPath = 'open_path',
+  ReadFileText = 'read_file_text',
+
   // Notifications
   ShowNotification = 'show_notification',
   NotificationClicked = 'notification_clicked',

electron/ipc/register.ts

@@ -452,6 +452,17 @@ export function registerAllHandlers(win: BrowserWindow): void {
     cancelAskAboutCode(args.requestId);
   });
 
+  // --- File links ---
+  ipcMain.handle(IPC.OpenPath, (_e, args) => {
+    validatePath(args.filePath, 'filePath');
+    return shell.openPath(args.filePath);
+  });
+
+  ipcMain.handle(IPC.ReadFileText, (_e, args) => {
+    validatePath(args.filePath, 'filePath');
+    return fs.readFileSync(args.filePath, 'utf8');
+  });
+
   // --- System ---
   ipcMain.handle(IPC.GetSystemFonts, () => getSystemMonospaceFonts());
 

electron/preload.cjs

@@ -90,6 +90,9 @@ const ALLOWED_CHANNELS = new Set([
   'cancel_ask_about_code',
   // System
   'get_system_fonts',
+  // File links
+  'open_path',
+  'read_file_text',
   // Notifications
   'show_notification',
   'notification_clicked',