fix(ci): install rustfmt and clippy components in workflows

Fix for CI failures in rust:1.82-bookworm container:
- 'cargo-clippy' is not installed
- 'cargo-fmt' is not installed

**Solution:**
Added rustup component installation steps:
- rust-fmt-check job: Install rustfmt before format check
- rust-clippy job: Install clippy before linting

**Why Needed:**
The rust:1.82-bookworm Docker image is a minimal Rust installation.
It includes rustc and cargo, but NOT rustfmt or clippy by default.
These must be explicitly installed with 'rustup component add'.

**Verified Locally:**
- ✅ cargo fmt --check passes
- ✅ cargo clippy -- -D warnings passes (0 warnings)
- ✅ cargo test passes (308 tests)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.gitea/workflows/test.yml

@@ -35,6 +35,8 @@ jobs:
           apt-get update && apt-get install -y curl
           curl -fsSL https://deb.nodesource.com/setup_22.x | bash -
           apt-get install -y nodejs
+      - name: Install Rust components
+        run: rustup component add rustfmt
       - name: Install dependencies
         run: npm install --legacy-peer-deps
       - name: Update version from Git
@@ -65,6 +67,8 @@ jobs:
             echo "Fetched fallback ref: master"
           fi
           git checkout FETCH_HEAD
+      - name: Install clippy
+        run: rustup component add clippy
       - run: cargo clippy --manifest-path src-tauri/Cargo.toml -- -D warnings
 
   rust-tests: