Optimise Tauri builds (#5404)

# Description of Changes
- Just build proper installers in CI for each platform
- Provide commands to build just the bundled apps without the need for
installers locally
  - `tauri-dev` - Builds quickly for an unoptimised version of the app
  - `tauri-build` - Builds the full optimised app installer for release
- `tauri-build-dev` - Builds an optimised app with no bundling (builds
to a folder on Mac; raw `.exe` on Windows; etc.)
- `tauri-build-dev-mac` - Builds an optimised bundled Mac app with no
installer (as an `.app` file)
- `tauri-build-dev-windows` - Builds an optimised bundled Windows app as
an `.nsis` installer
- `tauri-build-dev-linux` - Builds an optimised bundled Linux app as an
`.appimage`

.github/workflows/tauri-build.yml

@@ -507,7 +507,6 @@ jobs:
             find . -name "*.msi" -exec cp {} "../../../dist/Stirling-PDF-${{ matrix.name }}.msi" \;
           elif [ "${{ matrix.platform }}" = "macos-15" ] || [ "${{ matrix.platform }}" = "macos-15-intel" ]; then
             find . -name "*.dmg" -exec cp {} "../../../dist/Stirling-PDF-${{ matrix.name }}.dmg" \;
-            find . -name "*.app" -exec cp -r {} "../../../dist/Stirling-PDF-${{ matrix.name }}.app" \;
           else
             find . -name "*.deb" -exec cp {} "../../../dist/Stirling-PDF-${{ matrix.name }}.deb" \;
             find . -name "*.AppImage" -exec cp {} "../../../dist/Stirling-PDF-${{ matrix.name }}.AppImage" \;
@@ -595,8 +594,8 @@ jobs:
             fi
           elif [ "${{ matrix.platform }}" = "macos-15" ] || [ "${{ matrix.platform }}" = "macos-15-intel" ]; then
             echo "Checking for macOS artifacts..."
-            find . -name "*.dmg" -o -name "*.app" | head -5
-            if [ $(find . -name "*.dmg" -o -name "*.app" | wc -l) -eq 0 ]; then
+            find . -name "*.dmg" | head -5
+            if [ $(find . -name "*.dmg" | wc -l) -eq 0 ]; then
               echo "❌ No macOS artifacts found"
               exit 1
             fi

frontend/package.json

@@ -77,6 +77,10 @@
     "preview": "vite preview",
     "tauri-dev": "tauri dev --no-watch",
     "tauri-build": "tauri build",
+    "tauri-build-dev": "tauri build --no-bundle",
+    "tauri-build-dev-mac": "tauri build --bundles app",
+    "tauri-build-dev-windows": "tauri build --bundles nsis",
+    "tauri-build-dev-linux": "tauri build --bundles appimage",
     "tauri-clean": "cd src-tauri && cargo clean && cd .. && rm -rf dist build",
     "typecheck": "npm run typecheck:proprietary",
     "typecheck:core": "tsc --noEmit --project tsconfig.core.json",

frontend/src-tauri/tauri.conf.json

@@ -26,7 +26,6 @@
             "deb",
             "rpm",
             "dmg",
-            "app",
             "msi"
         ],
         "icon": [