fix: dropdown text invisible on macOS + correct codesign order for DMG

- globals.css: add button reset with -webkit-appearance: none and
  -webkit-text-fill-color: currentColor so SelectTrigger text is visible
  on macOS WebKit without breaking Tailwind text-* variant overrides
- release.yml: build .app only first, ad-hoc sign it, then create DMG
  via hdiutil so the signed .app is inside the DMG (previously codesign
  ran after Tauri already sealed the unsigned .app into the DMG)

.gitea/workflows/release.yml

@@ -116,9 +116,15 @@ jobs:
           npm ci --legacy-peer-deps
           rustup target add aarch64-apple-darwin
           cargo install tauri-cli --version "^2" --locked
-          CI=true cargo tauri build --target aarch64-apple-darwin
-          codesign --deep --force --sign - \
-            src-tauri/target/aarch64-apple-darwin/release/bundle/macos/TFTSR.app
+          # Build the .app bundle only (no DMG yet so we can sign before packaging)
+          CI=true cargo tauri build --target aarch64-apple-darwin --bundles app
+          APP=src-tauri/target/aarch64-apple-darwin/release/bundle/macos/TFTSR.app
+          # Ad-hoc sign: changes Gatekeeper error from "damaged" to "unidentified developer"
+          codesign --deep --force --sign - "$APP"
+          # Create DMG from the signed .app
+          mkdir -p src-tauri/target/aarch64-apple-darwin/release/bundle/dmg
+          DMG=src-tauri/target/aarch64-apple-darwin/release/bundle/dmg/TFTSR.dmg
+          hdiutil create -volname "TFTSR" -srcfolder "$APP" -ov -format UDZO "$DMG"
       - name: Upload artifacts
         env:
           RELEASE_TOKEN: ${{ secrets.RELEASE_TOKEN }}

src/styles/globals.css

@@ -59,6 +59,16 @@
     -webkit-text-fill-color: hsl(var(--foreground));
   }
 
+  /* Reset button appearance so macOS WebKit doesn't apply system button styling.
+     Use currentColor so -webkit-text-fill-color always matches whatever Tailwind
+     sets via text-* utilities (e.g. text-primary-foreground). */
+  button {
+    -webkit-appearance: none;
+    appearance: none;
+    color: inherit;
+    -webkit-text-fill-color: currentColor;
+  }
+
   input::placeholder, textarea::placeholder {
     color: hsl(var(--muted-foreground));
     -webkit-text-fill-color: hsl(var(--muted-foreground));