Improve toast duration and speaker override samples

openspec/specs/meeting-session/spec.md

@@ -99,7 +99,7 @@ The agenda SHALL be extracted from the appointment body content before the Teams
 - **AND** omits `scheduled_end` from assistant-context frontmatter
 
 ### Requirement: Outlook Teams meetings can prompt recording start
-Meeting Assistant SHALL provide a disabled-by-default setting that enables scheduled Outlook Classic calendar checks for recording-start prompts.
+Meeting Assistant SHALL enable scheduled Outlook Classic calendar checks for recording-start prompts by default.
 
 When scheduled recording prompts are enabled on Windows, Meeting Assistant SHALL periodically read the user's Outlook Classic calendar appointments for the current local day through COM into an in-memory cache.
 
@@ -111,6 +111,8 @@ Meeting Assistant SHALL consider Teams appointments from Outlook calendar data a
 
 When a Teams appointment reaches its scheduled start window, Meeting Assistant SHALL show a native Windows app notification asking whether to record the meeting, with affirmative and negative actions.
 
+On Windows, the recording-start notification SHALL request reminder-style toast behavior and remain actionable for 5 minutes.
+
 Meeting Assistant SHALL prompt at most once per calendar appointment during a local day, regardless of whether the user accepts, declines, or ignores the notification.
 
 If the user accepts the recording prompt while no recording is active, Meeting Assistant SHALL start a new recording normally.
@@ -124,6 +126,7 @@ When stopping an active recording for an accepted prompt, Meeting Assistant SHAL
 - **AND** Meeting Assistant has synced Outlook Classic Teams appointments for today
 - **WHEN** the appointment reaches its scheduled start window
 - **THEN** Meeting Assistant shows a native Windows app notification asking whether to record the meeting
+- **AND** the notification remains actionable for 5 minutes
 - **AND** marks that appointment as prompted for the day
 
 #### Scenario: Back-to-back cached Teams meetings prompt without another Outlook sync
@@ -351,4 +354,3 @@ Meeting Assistant SHALL provide a diagnostic endpoint that opens the workflow ru
 - **GIVEN** the rules editor chat window content fits without scrolling or is already near the bottom
 - **WHEN** a new user or assistant message is appended
 - **THEN** the conversation scrolls to the bottom of the newly rendered message content
-