refactor(types): simplify pass on P1 batch

Follow-up to 15ac253b per /simplify review:

- gateway/platforms/discord.py:3638 - move self.resolved = True *after*
  the `if interaction.data is None: return` guard. Previously the view
  was marked resolved before the None-guard, so a None data payload
  silently rejected the user's next click.
- agent/display.py:732 - replace `if self.start_time is None: continue`
  with `assert self.start_time is not None`. start() sets start_time
  before the animate thread starts, so the None branch was dead; the
  `continue` form would have busy-looped (skipping the 0.12s sleep).
- tests/hermes_cli/test_config_shapes.py - drop __total__ dunder
  restatement test (it just echoes the class declaration); trim commit
  narration from module docstring.
- tests/agent/test_credential_pool.py, tests/tools/test_rl_training_tool.py -
  drop "added in commit ..." banners (narrates the change per CLAUDE.md).

tests/hermes_cli/test_config_shapes.py

@@ -1,17 +1,11 @@
-"""Tests for TypedDict shape definitions added in commit fc00f699.
-
-Verifies that _CamofoxConfig is importable, honours total=False
-(all fields optional), and nests correctly inside _BrowserConfig.
-"""
+"""Runtime smoke tests for `_CamofoxConfig` / `_BrowserConfig` TypedDict shapes."""
 
 from __future__ import annotations
 
 
 def test_camofox_config_is_partial_typeddict():
-    """_CamofoxConfig should accept zero or more keys (total=False)."""
-    from hermes_cli.config import _CamofoxConfig, _BrowserConfig
+    from hermes_cli.config import _CamofoxConfig
 
-    # total=False: constructing with no keys must succeed at runtime
     cfg_empty: _CamofoxConfig = {}
     cfg_with_field: _CamofoxConfig = {"managed_persistence": True}
 
@@ -20,8 +14,7 @@ def test_camofox_config_is_partial_typeddict():
 
 
 def test_camofox_config_nested_in_browser_config():
-    """_CamofoxConfig should be accepted in the camofox slot of _BrowserConfig."""
-    from hermes_cli.config import _CamofoxConfig, _BrowserConfig
+    from hermes_cli.config import _BrowserConfig
 
     browser: _BrowserConfig = {
         "inactivity_timeout": 60,
@@ -33,10 +26,3 @@ def test_camofox_config_nested_in_browser_config():
     }
 
     assert browser["camofox"].get("managed_persistence") is False
-
-
-def test_camofox_config_total_false_flag():
-    """_CamofoxConfig.__total__ must be False (all fields optional)."""
-    from hermes_cli.config import _CamofoxConfig
-
-    assert _CamofoxConfig.__total__ is False