fix: resolve not-subscriptable ty diagnostics across codebase

Add TypedDicts for DEFAULT_CONFIG, CLI state dicts (_ModelPickerState,
_ApprovalState, _ClarifyState), and OPTIONAL_ENV_VARS so ty can resolve
nested dict subscripts.  Guard Optional returns before subscripting
(toolsets, cron/scheduler, delegate_tool), coerce str|None to str before
slicing (gateway/run, run_agent), split ternary for isinstance narrowing
(wecom), and suppress discord interaction.data access with ty: ignore.

cli.py

@@ -28,7 +28,7 @@ import textwrap
 from contextlib import contextmanager
 from pathlib import Path
 from datetime import datetime
-from typing import List, Dict, Any, Optional
+from typing import List, Dict, Any, Optional, TypedDict
 
 logger = logging.getLogger(__name__)
 
@@ -81,6 +81,34 @@ _project_env = Path(__file__).parent / '.env'
 load_hermes_dotenv(hermes_home=_hermes_home, project_env=_project_env)
 
 
+class _ModelPickerState(TypedDict, total=False):
+    stage: str
+    providers: List[Dict[str, Any]]
+    selected: int
+    current_model: str
+    current_provider: str
+    user_provs: Optional[Dict[str, Any]]
+    custom_provs: Optional[Dict[str, Any]]
+    provider_data: Dict[str, Any]
+    model_list: List[str]
+
+
+class _ApprovalState(TypedDict, total=False):
+    command: str
+    description: str
+    choices: List[str]
+    selected: int
+    response_queue: "queue.Queue[str]"
+    show_full: bool
+
+
+class _ClarifyState(TypedDict, total=False):
+    question: str
+    choices: List[str]
+    selected: int
+    response_queue: "queue.Queue[str]"
+
+
 _REASONING_TAGS = (
     "REASONING_SCRATCHPAD",
     "think",
@@ -1956,16 +1984,16 @@ class HermesCLI:
         self._interrupt_queue = queue.Queue()
         self._should_exit = False
         self._last_ctrl_c_time = 0
-        self._clarify_state = None
+        self._clarify_state: Optional[_ClarifyState] = None
         self._clarify_freetext = False
         self._clarify_deadline = 0
         self._sudo_state = None
         self._sudo_deadline = 0
         self._modal_input_snapshot = None
-        self._approval_state = None
+        self._approval_state: Optional[_ApprovalState] = None
         self._approval_deadline = 0
         self._approval_lock = threading.Lock()
-        self._model_picker_state = None
+        self._model_picker_state: Optional[_ModelPickerState] = None
         self._secret_state = None
         self._secret_deadline = 0
         self._spinner_text: str = ""  # thinking spinner text for TUI