fix: build for native architecture only

Removed universal-apple-darwin target since Bun CLI can't cross-compile.
Workflow now builds for runner's native architecture (aarch64).

Universal binaries can be added later with a matrix strategy.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: bwl

.github/workflows/release.yml

@@ -43,7 +43,7 @@ jobs:
 
       - name: Build Tauri app
         working-directory: forest-desktop
-        run: bun run tauri build --target universal-apple-darwin
+        run: bun run tauri build
         env:
           TAURI_PRIVATE_KEY: ${{ secrets.TAURI_PRIVATE_KEY }}
           TAURI_KEY_PASSWORD: ${{ secrets.TAURI_KEY_PASSWORD }}
@@ -60,4 +60,4 @@ jobs:
           prerelease: false
           generate_release_notes: true
           files: |
-            forest-desktop/src-tauri/target/universal-apple-darwin/release/bundle/dmg/*.dmg
+            forest-desktop/src-tauri/target/release/bundle/dmg/*.dmg