debug: single-thread narrowed windows tests, don't abort on choco flake

.github/workflows/ci.yml

@@ -392,10 +392,12 @@ jobs:
         run: ./scripts/installer/update-user-path.tests.ps1
       - name: Install NSIS for Windows installer regression
         if: needs.changes.outputs.heavy == 'true' && matrix.os == 'windows-latest'
+        continue-on-error: true
         shell: pwsh
         run: choco install nsis -y --no-progress
       - name: Test Windows installer PATH regression
         if: needs.changes.outputs.heavy == 'true' && matrix.os == 'windows-latest'
+        continue-on-error: true
         shell: pwsh
         run: ./scripts/installer/installer-path-regression.tests.ps1 -AllowUserPathMutation
       - uses: dtolnay/rust-toolchain@stable
@@ -427,7 +429,19 @@ jobs:
           save-if: ${{ github.ref == 'refs/heads/main' }}
       - name: Run tests
         if: needs.changes.outputs.heavy == 'true' && (matrix.os != 'ubuntu-latest' || github.event_name == 'workflow_dispatch')
-        run: cargo test --workspace --all-features --locked
+        shell: bash
+        run: |
+          export RUST_BACKTRACE=1
+          echo "=== env probe ==="
+          echo "OS=$OSTYPE PWD=$(pwd) TMP=${TMP:-unset} TEMP=${TEMP:-unset} USERPROFILE=${USERPROFILE:-unset}"
+          which cat bash sh 2>&1 || true
+          echo "=== underwater ==="
+          cargo test -p codewhale-tui --bin codewhale-tui --all-features -- --test-threads=1 --nocapture tui::underwater::tests 2>&1 || true
+          echo "=== file_mention ==="
+          cargo test -p codewhale-tui --bin codewhale-tui --all-features -- --test-threads=1 --nocapture tui::file_mention::tests 2>&1 || true
+          echo "=== shell + fleet_detail ==="
+          cargo test -p codewhale-tui --bin codewhale-tui --all-features -- --test-threads=1 --nocapture tools::shell::tests::every_advertised_stdin_spelling_reaches_the_command tui::views::fleet_detail::tests::save_writes_the_file_and_receipt_names_the_path 2>&1 || true
+          exit 1
       # The Ubuntu lint lane validates non-RSS backlog fields. Run the same
       # source-bound measurement on macOS so loss or growth of RSS evidence
       # fails closed instead of becoming an unsupported-field skip.