TIER-2 READ conductor/code_styleguides/error_handling.md end-to-end before Phase 8: refactor(gui_2): migrate L897 _capture_workspace_profile to Result[T] (Phase 8)

Migrate the imgui.save_ini_settings_to_memory try/except in
App._capture_workspace_profile (L897) to the canonical Result[T] pattern:

- Extract _capture_workspace_profile_ini_result(app) -> Result[str]
  helper into Phase 8 Property Setter / State Result Helpers region.
- The legacy _capture_workspace_profile method calls the helper and
  drains errors to app._last_request_errors (per FR-BC-4 event-handler
  drain pattern; this is a property setter on the App).
- The original fallback behavior (ini = '' on failure) is preserved
  so the legacy WorkspaceProfile still constructs with empty ini_content.

Tests:
- test_phase_8_l897_capture_workspace_profile_ini_result_success
- test_phase_8_l897_capture_workspace_profile_ini_result_failure

Audit: INTERNAL_BROAD_CATCH count in src/gui_2.py is now 0. All 22
INTERNAL_BROAD_CATCH sites originally in src/gui_2.py have been
migrated to Result[T] across Phases 3-8.

tests/test_gui_2_result.py

@@ -1553,3 +1553,42 @@ def test_phase_8_l591_diag_layout_state_ini_text_result_failure():
  assert "permission denied" in err.message
  assert result.data == ""
 
+
+def test_phase_8_l897_capture_workspace_profile_ini_result_success():
+ """
+ L897 _capture_workspace_profile_ini_result returns Result(data=ini_str) on success.
+
+ The helper wraps the imgui.save_ini_settings_to_memory try/except in
+ App._capture_workspace_profile. On success, returns Result(data=ini_str)
+ where ini_str is the serialized INI content. The legacy wrapper drains
+ errors to app._last_request_errors.
+ """
+ from src import gui_2
+ from unittest.mock import MagicMock, patch
+ app = MagicMock()
+ with patch.object(gui_2.imgui, "save_ini_settings_to_memory", return_value="[Window][Provider]\nPos=10,20"):
+  result = gui_2._capture_workspace_profile_ini_result(app)
+ assert result.ok, f"Expected ok=True on success, got errors: {result.errors}"
+ assert result.data == "[Window][Provider]\nPos=10,20"
+
+
+def test_phase_8_l897_capture_workspace_profile_ini_result_failure():
+ """
+ L897 _capture_workspace_profile_ini_result returns Result(data="", errors=[ErrorInfo]) on failure.
+
+ When imgui.save_ini_settings_to_memory raises, the helper returns Result
+ with ErrorInfo describing the failure and data="" (matching the original
+ except branch's empty-string fallback).
+ """
+ from src import gui_2
+ from unittest.mock import MagicMock, patch
+ app = MagicMock()
+ with patch.object(gui_2.imgui, "save_ini_settings_to_memory", side_effect=RuntimeError("imgui backend down")):
+  result = gui_2._capture_workspace_profile_ini_result(app)
+ assert not result.ok, f"Expected ok=False on failure, got data: {result.data}"
+ assert result.errors, "Expected at least one error on failure"
+ err = result.errors[0]
+ assert err.source == "gui_2._capture_workspace_profile_ini_result"
+ assert "imgui backend down" in err.message
+ assert result.data == ""
+