Replace the hardcoded help string in TuiCommandRouter.handle() with a
dynamic lookup against SLASH_COMMAND_SPECS from slash_catalog.py.

Changes:
- Add _help_command(), _help_list_all(), _help_for_command() methods to
  TuiCommandRouter
- /help (no args): iterates SLASH_COMMAND_SPECS, groups commands by
  namespace (sorted alphabetically), renders all 70 commands with
  descriptions in colon-namespaced format (e.g. persona:list)
- /help <command>: looks up the given command in SLASH_COMMAND_SPECS and
  renders its full help (group, description)
- /help <unknown>: returns 'Unknown command: /<cmd>' message
- /help /persona:list (with leading slash): strips the slash and resolves
  correctly
- Import defaultdict and SLASH_COMMAND_SPECS at module level

Tests:
- Update tui_commands_coverage.feature: replace old exact-match scenario
  for help text with new dynamic-listing assertions
- Add tui_commands_coverage_steps.py: new 'should contain' step definition
- Add tui_help_command_full_catalog.feature: 12 BDD scenarios covering
  /help no-args, /help <command>, /help <unknown>, namespace grouping,
  colon-namespaced format, and regression against old hardcoded string
- Add tui_help_command_full_catalog_steps.py: step definitions for the
  new feature (all-commands check, not-equal assertion)
- Add robot/tui_help_command.robot: 5 Robot Framework integration tests
  verifying the help command via direct Python invocation and headless
  TUI startup

Closes #3434

---
**Automated by CleverAgents Bot**
Supervisor: Implementation | Agent: ca-issue-worker

@@ -0,0 +12,4 @@
+
+
+@then("the help result contains all 70 catalogued commands")
+def step_help_result_contains_all_commands(context: object) -> None:

@@ -0,0 +21,4 @@
+    assert not missing, (
+        f"The following {len(missing)} commands were missing from /help output: "
+        + ", ".join(missing)
+    )

@@ -0,0 +13,4 @@
+
+@then("the help result contains all 70 catalogued commands")
+def step_help_result_contains_all_commands(context: object) -> None:
+    """Verify that every command in SLASH_COMMAND_SPECS appears in the help output."""

@@ -0,0 +24,4 @@
+    )
+
+
+@then('the handle result should not be "{unexpected}"')

@@ -0,0 +13,4 @@
+
+@then("the help result contains all 70 catalogued commands")
+def step_help_result_contains_all_commands(context: object) -> None:
+    """Verify that every command in SLASH_COMMAND_SPECS appears in the help output."""

@@ -0,0 +24,4 @@
+    )
+
+
+@then('the handle result should not be "{unexpected}"')

@@ -0,0 +13,4 @@
+
+@then("the help result contains all 70 catalogued commands")
+def step_help_result_contains_all_commands(context: object) -> None:
+    """Verify that every command in SLASH_COMMAND_SPECS appears in the help output."""

@@ -0,0 +24,4 @@
+    )
+
+
+@then('the handle result should not be "{unexpected}"')

@@ -0,0 +13,4 @@
+
+@then("the help result contains all 70 catalogued commands")
+def step_help_result_contains_all_commands(context: object) -> None:
+    """Verify that every command in SLASH_COMMAND_SPECS appears in the help output."""

@@ -0,0 +24,4 @@
+    )
+
+
+@then('the handle result should not be "{unexpected}"')

@@ -0,0 +14,4 @@
+@then("the help result contains all 70 catalogued commands")
+def step_help_result_contains_all_commands(context: object) -> None:
+    """Verify that every command in SLASH_COMMAND_SPECS appears in the help output."""
+    result: str = context.handle_result  # type: ignore[attr-defined]

@@ -0,0 +24,4 @@
+    )
+
+
+@then('the handle result should not be "{unexpected}"')

@@ -58,1 +92,4 @@
+                )
+        return f"Unknown command: /{cmd}"
+
     def _persona_command(self, tokens: list[str], *, session_id: str) -> str:

@@ -0,0 +13,4 @@
+
+@then("the help result contains all 70 catalogued commands")
+def step_help_result_contains_all_commands(context: object) -> None:
+    """Verify that every command in SLASH_COMMAND_SPECS appears in the help output."""

@@ -0,0 +24,4 @@
+    )
+
+
+@then('the handle result should not be "{unexpected}"')

@@ -0,0 +13,4 @@
+
+@then("the help result contains all 70 catalogued commands")
+def step_help_result_contains_all_commands(context: object) -> None:
+    """Verify that every command in SLASH_COMMAND_SPECS appears in the help output."""

@@ -0,0 +25,4 @@
+
+
+@then('the handle result should not be "{unexpected}"')
+def step_handle_result_not_equal(context: object, unexpected: str) -> None:

@@ -0,0 +12,4 @@
+
+
+@then("the help result contains all 70 catalogued commands")
+def step_help_result_contains_all_commands(context: object) -> None:

@@ -0,0 +23,4 @@
+        + ", ".join(missing)
+    )
+
+

@@ -0,0 +13,4 @@
+
+@then("the help result contains all 70 catalogued commands")
+def step_help_result_contains_all_commands(context: object) -> None:
+    """Verify that every command in SLASH_COMMAND_SPECS appears in the help output."""

@@ -0,0 +24,4 @@
+    )
+
+
+@then('the handle result should not be "{unexpected}"')

@@ -0,0 +14,4 @@
+@then("the help result contains all 70 catalogued commands")
+def step_help_result_contains_all_commands(context: object) -> None:
+    """Verify that every command in SLASH_COMMAND_SPECS appears in the help output."""
+    result: str = context.handle_result  # type: ignore[attr-defined]

@@ -0,0 +27,4 @@
+@then('the handle result should not be "{unexpected}"')
+def step_handle_result_not_equal(context: object, unexpected: str) -> None:
+    """Verify the handle result is NOT the given string."""
+    result: str = context.handle_result  # type: ignore[attr-defined]

@@ -0,0 +13,4 @@
+
+@then("the help result contains all 70 catalogued commands")
+def step_help_result_contains_all_commands(context: object) -> None:
+    """Verify that every command in SLASH_COMMAND_SPECS appears in the help output."""

@@ -0,0 +24,4 @@
+    )
+
+
+@then('the handle result should not be "{unexpected}"')

@@ -0,0 +13,4 @@
+
+@then("the help result contains all 70 catalogued commands")
+def step_help_result_contains_all_commands(context: object) -> None:
+    """Verify that every command in SLASH_COMMAND_SPECS appears in the help output."""

@@ -0,0 +25,4 @@
+
+
+@then('the handle result should not be "{unexpected}"')
+def step_handle_result_not_equal(context: object, unexpected: str) -> None:

@@ -0,0 +12,4 @@
+
+
+@then("the help result contains all 70 catalogued commands")
+def step_help_result_contains_all_commands(context: object) -> None:

@@ -0,0 +21,4 @@
+    assert not missing, (
+        f"The following {len(missing)} commands were missing from /help output: "
+        + ", ".join(missing)
+    )

@@ -0,0 +11,4 @@
+from cleveragents.tui.slash_catalog import SLASH_COMMAND_SPECS
+
+
+@then("the help result contains all 70 catalogued commands")

@@ -0,0 +22,4 @@
+        f"The following {len(missing)} commands were missing from /help output: "
+        + ", ".join(missing)
+    )
+

@@ -0,0 +11,4 @@
+from cleveragents.tui.slash_catalog import SLASH_COMMAND_SPECS
+
+
+@then("the help result contains all 70 catalogued commands")

@@ -0,0 +13,4 @@
+
+@then("the help result contains all 70 catalogued commands")
+def step_help_result_contains_all_commands(context: object) -> None:
+    """Verify that every command in SLASH_COMMAND_SPECS appears in the help output."""

@@ -0,0 +24,4 @@
+    )
+
+
+@then('the handle result should not be "{unexpected}"')

@@ -0,0 +12,4 @@
+
+
+@then("the help result contains all 70 catalogued commands")
+def step_help_result_contains_all_commands(context: object) -> None:

@@ -0,0 +24,4 @@
+    )
+
+
+@then('the handle result should not be "{unexpected}"')

@@ -0,0 +13,4 @@
+
+@then("the help result contains all 70 catalogued commands")
+def step_help_result_contains_all_commands(context: object) -> None:
+    """Verify that every command in SLASH_COMMAND_SPECS appears in the help output."""

@@ -0,0 +24,4 @@
+    )
+
+
+@then('the handle result should not be "{unexpected}"')

@@ -0,0 +13,4 @@
+
+@then("the help result contains all 70 catalogued commands")
+def step_help_result_contains_all_commands(context: object) -> None:
+    """Verify that every command in SLASH_COMMAND_SPECS appears in the help output."""

@@ -0,0 +22,4 @@
+        f"The following {len(missing)} commands were missing from /help output: "
+        + ", ".join(missing)
+    )
+

@@ -0,0 +12,4 @@
+
+
+@then("the help result contains all 70 catalogued commands")
+def step_help_result_contains_all_commands(context: object) -> None:

@@ -0,0 +23,4 @@
+        + ", ".join(missing)
+    )
+
+

@@ -0,0 +12,4 @@
+
+
+@then("the help result contains all 70 catalogued commands")
+def step_help_result_contains_all_commands(context: object) -> None:

@@ -0,0 +14,4 @@
+@then("the help result contains all 70 catalogued commands")
+def step_help_result_contains_all_commands(context: object) -> None:
+    """Verify that every command in SLASH_COMMAND_SPECS appears in the help output."""
+    result: str = context.handle_result  # type: ignore[attr-defined]

@@ -0,0 +24,4 @@
+    )
+
+
+@then('the handle result should not be "{unexpected}"')