ci: align quality gates to reality

Clippy job now runs 'cargo check-all' (--all-targets), matching the local gate
so CI can no longer pass while the local gate fails. Coverage is now
informational (--summary-only): the former --fail-under-lines 100 excluded all
main.rs and rewarded stub+matching-test theater; a realistic threshold plus a
required mock-server E2E gate lands with Phase 1.C.6.

Refs #142 #143

.github/workflows/ci.yml

@@ -36,8 +36,8 @@ jobs:
           sudo apt-get install -y libglib2.0-dev libwebkit2gtk-4.1-dev libgtk-3-dev libayatana-appindicator3-dev librsvg2-dev build-essential curl wget file libssl-dev
       - name: Cache Cargo Dependencies
         uses: Swatinem/rust-cache@v2
-      - name: Run Clippy Linter
-        run: cargo clippy --workspace -- -D warnings
+      - name: Run Clippy Linter (all targets, matches local `cargo check-all`)
+        run: cargo check-all
 
   test:
     name: Test Suite Execution
@@ -68,8 +68,12 @@ jobs:
         uses: taiki-e/install-action@cargo-llvm-cov
       - name: Cache Cargo Dependencies
         uses: Swatinem/rust-cache@v2
-      - name: Measure & Enforce Code Coverage Threshold
-        run: cargo llvm-cov --workspace --ignore-filename-regex "main\.rs" --fail-under-lines 100
+      # Coverage is informational for now. The former `--fail-under-lines 100`
+      # gate excluded all main.rs (the integration wiring) and incentivized
+      # stub+matching-test theater. A realistic threshold plus a required
+      # mock-server E2E gate lands with Phase 1.C.6 (GH #143).
+      - name: Measure Code Coverage (informational)
+        run: cargo llvm-cov --workspace --ignore-filename-regex "main\.rs" --summary-only
 
   build-matrix:
     name: Cross-Platform Build Matrix (${{ matrix.os }})