ci: add Tauri 2.0 system dependencies to Ubuntu CI jobs

Fix CI workflow failures caused by missing GTK/WebKit development
libraries required by Tauri 2.0 (wraith-transfer application).

Root Cause:
- glib-sys, gobject-sys, and other GTK bindings failed to build
- Ubuntu runners lacked required Tauri v2 system dependencies

Solution:
Added dependency installation step to all Ubuntu-based CI jobs:
- libwebkit2gtk-4.1-dev (WebKit2GTK 4.1 for Tauri v2)
- libappindicator3-dev (system tray support)
- librsvg2-dev (SVG rendering)
- patchelf (binary patching)
- libgtk-3-dev (GTK3 development)
- libayatana-appindicator3-dev (Ubuntu app indicator)

Jobs Updated:
- Check (ubuntu-latest)
- Test (ubuntu-latest with conditional)
- Clippy (ubuntu-latest)
- Documentation (ubuntu-latest)
- MSRV 1.85 (ubuntu-latest)
- Coverage (ubuntu-latest)

References:
- https://v2.tauri.app/start/prerequisites/
- https://v2.tauri.app/distribute/pipelines/github/

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Author: doublegate

.github/workflows/ci.yml

@@ -31,6 +31,11 @@ jobs:
     steps:
       - uses: actions/checkout@v6
 
+      - name: Install system dependencies (Ubuntu)
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libwebkit2gtk-4.1-dev libappindicator3-dev librsvg2-dev patchelf libgtk-3-dev libayatana-appindicator3-dev
+
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@stable
 
@@ -68,6 +73,12 @@ jobs:
     steps:
       - uses: actions/checkout@v6
 
+      - name: Install system dependencies (Ubuntu)
+        if: matrix.os == 'ubuntu-latest'
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libwebkit2gtk-4.1-dev libappindicator3-dev librsvg2-dev patchelf libgtk-3-dev libayatana-appindicator3-dev
+
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@stable
 
@@ -93,6 +104,11 @@ jobs:
     steps:
       - uses: actions/checkout@v6
 
+      - name: Install system dependencies (Ubuntu)
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libwebkit2gtk-4.1-dev libappindicator3-dev librsvg2-dev patchelf libgtk-3-dev libayatana-appindicator3-dev
+
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -130,6 +146,11 @@ jobs:
     steps:
       - uses: actions/checkout@v6
 
+      - name: Install system dependencies (Ubuntu)
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libwebkit2gtk-4.1-dev libappindicator3-dev librsvg2-dev patchelf libgtk-3-dev libayatana-appindicator3-dev
+
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@stable
 
@@ -153,6 +174,11 @@ jobs:
     steps:
       - uses: actions/checkout@v6
 
+      - name: Install system dependencies (Ubuntu)
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libwebkit2gtk-4.1-dev libappindicator3-dev librsvg2-dev patchelf libgtk-3-dev libayatana-appindicator3-dev
+
       - name: Install Rust 1.85
         uses: dtolnay/rust-toolchain@1.85
 
@@ -168,6 +194,11 @@ jobs:
     steps:
       - uses: actions/checkout@v6
 
+      - name: Install system dependencies (Ubuntu)
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libwebkit2gtk-4.1-dev libappindicator3-dev librsvg2-dev patchelf libgtk-3-dev libayatana-appindicator3-dev
+
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@stable
         with: