scaffold sMusic: Tauri v2 player core (audio/library/tags/discord/tray) + cover relay + CI

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

.github/workflows/ci.yml

@@ -0,0 +1,33 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  check:
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          targets: x86_64-pc-windows-msvc
+
+      - uses: Swatinem/rust-cache@v2
+        with:
+          workspaces: src-tauri
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+
+      - run: npm ci
+
+      - run: cargo check --manifest-path src-tauri/Cargo.toml
+
+      - run: cargo clippy --manifest-path src-tauri/Cargo.toml -- -D warnings
+
+      - run: cargo test --manifest-path src-tauri/Cargo.toml --lib
+
+      - run: cargo build --manifest-path src-tauri/Cargo.toml

.github/workflows/release.yml

@@ -0,0 +1,34 @@
+name: Release
+
+on:
+  workflow_dispatch:
+  push:
+    tags:
+      - "v*"
+
+jobs:
+  build:
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          targets: x86_64-pc-windows-msvc
+
+      - uses: Swatinem/rust-cache@v2
+        with:
+          workspaces: src-tauri
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+
+      - run: npm ci
+
+      - run: npx tauri build
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: smusic-installer
+          path: src-tauri/target/release/bundle/nsis/*.exe