make CLI argv args reach typed command handlers (T-232)

Parameterized subsystem commands were unreachable from the CLI: the
argv translator emits {positional, flags} but the handlers read named
top-level keys (args['path'], args['id'], ...), and nothing mapped
between them -- so 'clide editor open <path>' returned 'path is
required'. The fix needed no new mechanism: D-74's CommandSchema.normalize
already folds the argv shape into named args by a declared positional
ordering; these commands just never registered a schema.

Adopts it for the navigation/drive surface -- editor.open/activate/read/
save/close, files.read/ls, pane.close/focus/resize/write -- with
non-required positional schemas, so the only effect is positional->named
mapping plus numeric coercion of line/cols/rows. Handlers unchanged;
missing-arg errors unchanged. Edit-mutation verbs, pane.spawn, and git
arg verbs are deferred (noted on the ticket).

Takes effect on app restart (the dispatcher is built once at boot).

Closes T-232 (under T-208 'Give Claude hands').

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

test/daemon/files_commands_test.dart

@@ -97,6 +97,15 @@ void main() {
     expect(r.data['path'], 'README.md');
   });
 
+  test('CLI positional path binds to files.read (T-232)', () async {
+    // argv shape {positional:[...]} → schema normalize → args['path'].
+    final r = await call('files.read', const {
+      'positional': ['README.md'],
+    });
+    expect(r.ok, isTrue, reason: r.error?.message);
+    expect(r.data['content'], 'hi');
+  });
+
   test('files.read accepts an absolute path under the workspace root', () async {
     // Regression: the markdown reader publishes absolute skill paths
     // (e.g. .claude/skills/.../SKILL.md). An absolute path under root