ci: consolidate platform pipelines and test prerequisites on macOS support

openspec/changes/add-macos-desktop-controls/specs/meeting-session/spec.md

@@ -27,8 +27,8 @@ Selecting `Open agent` on macOS SHALL open a native window titled `Meeting Summa
 - **THEN** a `Meeting Summary Agent` window opens
 - **AND** the user can submit a chat message and receive the interactive agent response
 
-#### Scenario: unavailable automatic approvals do not alter the macOS agent conversation
-- **GIVEN** automatic workflow-change approval notifications are unavailable on macOS
-- **WHEN** the summary agent requests a workflow change or project association
-- **THEN** the request is declined without opening or changing the interactive agent conversation
-- **AND** a direct attempt to open an automatic prompt reports the platform limitation instead of silently discarding the prompt
+#### Scenario: unanswered automatic approvals do not alter the macOS agent conversation
+- **GIVEN** an automatic workflow-change or project-association request is pending on macOS
+- **WHEN** no valid approval arrives before the request expires or its lifetime is canceled
+- **THEN** the request is declined without opening or changing an interactive agent conversation
+- **AND** merely hiding or dismissing its native notification does not approve the request