fix(ci): exclude momoto from tests, allow unused_mut globally

- Tests: add --exclude for momoto vendor crates (feature unification
  pulls them in even with --no-default-features --features tui)
- Allow unused_mut crate-wide: feature-gated code creates mut variables
  that are only mutated under specific feature combinations

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: osvalois

.github/workflows/ci.yml

@@ -95,7 +95,7 @@ jobs:
       - uses: dtolnay/rust-toolchain@stable
       - uses: Swatinem/rust-cache@v2
       - name: Run tests
-        run: cargo test --workspace --no-default-features --features tui
+        run: cargo test --workspace --no-default-features --features tui --exclude momoto-core --exclude momoto-metrics --exclude momoto-intelligence
 
   # ── Tests — macOS (only on push to main, macOS runner = 10× cost) ────────
   test-macos:
@@ -113,7 +113,7 @@ jobs:
       - uses: dtolnay/rust-toolchain@stable
       - uses: Swatinem/rust-cache@v2
       - name: Run tests
-        run: cargo test --workspace --no-default-features --features tui
+        run: cargo test --workspace --no-default-features --features tui --exclude momoto-core --exclude momoto-metrics --exclude momoto-intelligence
 
   # ── Color-science tests (informational, non-gating) ───────────────────────
   # Runs only when the momoto-ui submodule is available.

crates/halcon-cli/src/lib.rs

@@ -10,6 +10,7 @@
     unused_imports,
     unused_variables,
     unused_assignments,
+    unused_mut,
     unexpected_cfgs,
     private_interfaces,
     clippy::too_many_arguments,

crates/halcon-cli/src/main.rs

@@ -6,6 +6,7 @@
     unused_imports,
     unused_variables,
     unused_assignments,
+    unused_mut,
     unexpected_cfgs,
     private_interfaces,
     clippy::too_many_arguments,