test: update stale tests to match current code (#11963)

Seven test files were asserting against older function signatures and
behaviors. CI has been red on main because of accumulated test debt
from other PRs; this catches the tests up.

- tests/agent/test_subagent_progress.py: _build_child_progress_callback
  now takes (task_index, goal, parent_agent, task_count=1); update all
  call sites and rewrite tests that assumed the old 'batch-only' relay
  semantics (now relays per-tool AND flushes a summary at BATCH_SIZE).
  Renamed test_thinking_not_relayed_to_gateway → test_thinking_relayed_to_gateway
  since thinking IS now relayed as subagent.thinking.
- tests/tools/test_delegate.py: _build_child_agent now requires
  task_count; add task_count=1 to all 8 call sites.
- tests/cli/test_reasoning_command.py: AIAgent gained _stream_callback;
  stub it on the two test agent helpers that use spec=AIAgent / __new__.
- tests/hermes_cli/test_cmd_update.py: cmd_update now runs npm install
  in repo root + ui-tui/ + web/ and 'npm run build' in web/; assert
  all four subprocess calls in the expected order.
- tests/hermes_cli/test_model_validation.py: dissimilar unknown models
  now return accepted=False (previously True with warning); update
  both affected tests.
- tests/tools/test_registry.py: include feishu_doc_tool and
  feishu_drive_tool in the expected builtin tool set.
- tests/gateway/test_voice_command.py: missing-voice-deps message now
  suggests 'pip install PyNaCl' not 'hermes-agent[messaging]'.

411/411 pass locally across these 7 files.

tests/hermes_cli/test_cmd_update.py

@@ -124,29 +124,23 @@ class TestCmdUpdateBranchFallback:
             if call.args and call.args[0][0] == "/usr/bin/npm"
         ]
 
+        # cmd_update runs npm commands in three locations:
+        #   1. repo root  — slash-command / TUI bridge deps
+        #   2. ui-tui/    — Ink TUI deps
+        #   3. web/       — install + "npm run build" for the web frontend
+        full_flags = [
+            "/usr/bin/npm",
+            "install",
+            "--silent",
+            "--no-fund",
+            "--no-audit",
+            "--progress=false",
+        ]
         assert npm_calls == [
-            (
-                [
-                    "/usr/bin/npm",
-                    "install",
-                    "--silent",
-                    "--no-fund",
-                    "--no-audit",
-                    "--progress=false",
-                ],
-                PROJECT_ROOT,
-            ),
-            (
-                [
-                    "/usr/bin/npm",
-                    "install",
-                    "--silent",
-                    "--no-fund",
-                    "--no-audit",
-                    "--progress=false",
-                ],
-                PROJECT_ROOT / "ui-tui",
-            ),
+            (full_flags, PROJECT_ROOT),
+            (full_flags, PROJECT_ROOT / "ui-tui"),
+            (["/usr/bin/npm", "install", "--silent"], PROJECT_ROOT / "web"),
+            (["/usr/bin/npm", "run", "build"], PROJECT_ROOT / "web"),
         ]
 
     def test_update_non_interactive_skips_migration_prompt(self, mock_args, capsys):