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/editor_commands_test.dart

@@ -47,6 +47,26 @@ void main() {
     expect(act['path'], 'doc.md');
   });
 
+  test('CLI positional path binds to editor.open (T-232)', () async {
+    // The C client sends the argv shape {positional:[...]}; the registered
+    // schema's normalize must map positional[0] -> path so the handler opens
+    // it (rather than returning "path is required").
+    final r = await call('editor.open', {
+      'positional': ['doc.md'],
+    });
+    expect(r.ok, isTrue, reason: r.error?.message);
+    expect(r.data['path'], 'doc.md');
+  });
+
+  test('CLI --line flag coerces to a number and binds (T-232)', () async {
+    final r = await call('editor.open', {
+      'positional': ['doc.md'],
+      'flags': {'line': '1'},
+    });
+    expect(r.ok, isTrue, reason: r.error?.message);
+    expect(r.data['path'], 'doc.md');
+  });
+
   test('editor.open with a 1-based line jumps the initial selection (T-52)', () async {
     await File('${sandbox.path}/multi.txt').writeAsString('one\ntwo\nthree\n');
     final r = await call('editor.open', {'path': 'multi.txt', 'line': 3});