desktop: rustfmt the pull tests; run fmt after clippy/test

Two macro-argument splits and a stray blank line, applied verbatim from run
2900's cargo fmt --check diff.

Also reorders the Linux job so `cargo fmt --check` runs AFTER clippy and the
tests. Fail-fast ordering would normally put the cheapest check first, but
there is no Rust toolchain on the workstation, so this lane is verified
entirely in CI — and a formatting nit failing first SKIPS clippy and the
tests, making a whole cycle teach nothing but whitespace. That has now cost
four cycles in this session alone. It still runs before the 20-40 minute
bundle build, so a fmt failure doesn't burn that either.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SreJkbxB4gx8pPsu8QbLPi

.forgejo/workflows/desktop.yml

@@ -52,10 +52,6 @@ jobs:
         run: npm ci && npm run build
         working-directory: frontend
 
-      - name: Rust format check
-        run: cargo fmt --check
-        working-directory: desktop/src-tauri
-
       - name: Clippy
         run: cargo clippy --all-targets -- -D warnings
         working-directory: desktop/src-tauri
@@ -64,6 +60,18 @@ jobs:
         run: cargo test
         working-directory: desktop/src-tauri
 
+      # Deliberately AFTER clippy + test, not before.
+      #
+      # It's the cheapest check, so fail-fast ordering would normally put it first —
+      # but there is no Rust toolchain on the workstation (the desktop lane is
+      # verified entirely here), so a formatting nit failing first SKIPS clippy and
+      # the tests, and one CI cycle teaches nothing but whitespace. Running it here
+      # means every push reports its real problems too. Still before the ~20-40 min
+      # bundle build, so a fmt failure doesn't burn that.
+      - name: Rust format check
+        run: cargo fmt --check
+        working-directory: desktop/src-tauri
+
       # Frontend already built above; skip the beforeBuildCommand rebuild.
       - name: Tauri build (deb + AppImage)
         run: cargo tauri build --config '{"build":{"beforeBuildCommand":""}}'