Add a macOS desktop app around the controller UI

.github/workflows/desktop.yml

@@ -0,0 +1,52 @@
+name: Desktop
+
+# Format, lint and test the macOS desktop app (its own Cargo workspace, so ci.yml never builds it).
+# Runs only when the app or this workflow changes: macOS runner minutes are billed.
+on:
+  push:
+    branches: [main]
+    paths:
+      - 'crucible-desktop/**'
+      - '.github/workflows/desktop.yml'
+  pull_request:
+    paths:
+      - 'crucible-desktop/**'
+      - '.github/workflows/desktop.yml'
+  workflow_dispatch:
+
+concurrency:
+  group: desktop-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+
+env:
+  CARGO_TERM_COLOR: always
+  CARGO_INCREMENTAL: "0"
+  CARGO_NET_RETRY: "10"
+
+jobs:
+  check:
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+        with:
+          persist-credentials: false
+
+      - uses: actions-rust-lang/setup-rust-toolchain@46268bd060767258de96ed93c1251119784f2ab6 # v1.16.1
+        with:
+          components: rustfmt, clippy
+          cache-workspaces: crucible-desktop -> target
+
+      - name: fmt
+        working-directory: crucible-desktop
+        run: cargo fmt --check
+
+      - name: clippy
+        working-directory: crucible-desktop
+        run: cargo clippy --all-targets --all-features --locked -- -D warnings
+
+      - name: test
+        working-directory: crucible-desktop
+        run: cargo test --locked

.github/workflows/release.yml

@@ -96,3 +96,48 @@ jobs:
           gh release create "$tag" \
             --title "$tag" --generate-notes --verify-tag 2>/dev/null || true
           gh release upload "$tag" dist/* --clobber
+
+  # The macOS desktop app, signed ad hoc: a downloaded copy needs Open Anyway (or
+  # `xattr -d com.apple.quarantine`) on first launch.
+  desktop:
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+        with:
+          persist-credentials: false
+          ref: ${{ inputs.tag || github.ref }}
+
+      - uses: actions-rust-lang/setup-rust-toolchain@46268bd060767258de96ed93c1251119784f2ab6 # v1.16.1
+        with:
+          cache-workspaces: crucible-desktop -> target
+
+      - uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
+
+      - name: Build Crucible.app
+        working-directory: crucible-desktop
+        run: |
+          set -euo pipefail
+          tag="${{ inputs.tag || github.ref_name }}"
+          version="${tag#v}"
+          [[ "$version" =~ ^[0-9]+\.[0-9]+\.[0-9]+ ]] || version="0.0.0"
+          bunx @tauri-apps/cli@2.12.1 build --bundles app --config "{\"version\":\"$version\"}"
+
+      - name: Package
+        run: |
+          set -euo pipefail
+          tag="${{ inputs.tag || github.ref_name }}"
+          name="Crucible-${tag}-aarch64-apple-darwin"
+          mkdir -p dist
+          ditto -c -k --keepParent crucible-desktop/target/release/bundle/macos/Crucible.app "dist/${name}.zip"
+          ( cd dist && shasum -a 256 "${name}.zip" > "${name}.zip.sha256" )
+          ls -la dist/
+
+      - name: Upload to release
+        if: ${{ github.ref_type == 'tag' || inputs.tag != '' }}
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          tag="${{ inputs.tag || github.ref_name }}"
+          gh release create "$tag" \
+            --title "$tag" --generate-notes --verify-tag 2>/dev/null || true
+          gh release upload "$tag" dist/* --clobber

crucible-desktop/.gitignore

@@ -0,0 +1,2 @@
+gen/
+permissions/autogenerated/