canonicalize temp paths in daemon/cli tests for macOS

Two tests compared a raw Directory.systemTemp path against an OS-resolved
one, which diverge on macOS where /tmp is a symlink to /private/tmp:
FilesService.atCwd resolves the CWD, and the clide-cli e2e server must hash
the same canonical workspace the C client sees via getcwd. Resolve symlinks
on both sides.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

test/daemon/files_commands_test.dart

@@ -231,7 +231,9 @@ void main() {
       Directory.current = nested;
       final svc = FilesService.atCwd(events: RecordingEventSink());
       // No .git anywhere on the walk → root falls back to CWD.
-      expect(svc.root.absolute.path, nested.absolute.path);
+      // Compare canonical paths: on macOS the CWD resolves through the
+      // /tmp → /private/tmp symlink, so the raw createTemp path differs.
+      expect(svc.root.resolveSymbolicLinksSync(), nested.resolveSymbolicLinksSync());
       await svc.shutdown();
     } finally {
       Directory.current = saved;