Release 3.8.2.1: reliability, UI probe/logs, CI, signing gates.

Clear sysproxy on core death; probe+reconnect; subscription prune;
Best ignores soft UDP; Windows tray; Android protocol gate; CI workflows.

Co-authored-by: Cursor <cursoragent@cursor.com>

.github/workflows/ci.yml

@@ -0,0 +1,31 @@
+name: ci
+
+on:
+  push:
+    branches: [main, master]
+  pull_request:
+
+jobs:
+  test:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+      - name: Test
+        run: go test ./...
+      - name: Build GUI
+        shell: bash
+        run: |
+          if [[ "${{ matrix.os }}" == "windows-latest" ]]; then
+            go build -o Navis.exe ./cmd/vpnapp
+          else
+            go build -o Navis ./cmd/vpnapp
+          fi
+      - name: Build CLI
+        run: go build -o Navis-cli ./cmd/vpnclient