feat(inbox): track first session-recording video play per signal card

Fires Inbox report action with action_type: play_session_recording the
first time a user clicks play on the inline session replay inside an
Evidence card. Per-card guard via ref so repeat plays during the same
open don't spam the event stream.

Author: andrewm4894

apps/code/src/renderer/features/inbox/components/detail/SignalCard.tsx

@@ -679,6 +679,8 @@ function SessionRecordingVideo({
 }) {
   const projectId = useAuthStateValue((state) => state.projectId);
   const videoRef = useRef<HTMLVideoElement>(null);
+  const hasFiredPlayRef = useRef(false);
+  const interaction = useSignalInteraction();
   const videoQuery = useAuthenticatedQuery<string | null>(
     ["export-video", projectId, exportedAssetId, sessionId],
     async (client) => {
@@ -718,6 +720,11 @@ function SessionRecordingVideo({
         muted
         preload="metadata"
         className="max-h-[300px] w-full rounded"
+        onPlay={() => {
+          if (hasFiredPlayRef.current) return;
+          hasFiredPlayRef.current = true;
+          interaction?.onInteraction({ type: "play_session_recording" });
+        }}
       />
     </Box>
   );

apps/code/src/renderer/features/inbox/components/detail/signalInteractionContext.ts

@@ -8,7 +8,8 @@ export type SignalInteractionAction =
       type: "expand_signal_section";
       section: "relevant_code" | "data_queried";
     }
-  | { type: "view_signal_external" };
+  | { type: "view_signal_external" }
+  | { type: "play_session_recording" };
 
 export interface SignalInteractionContextValue {
   signal: Signal;

apps/code/src/shared/types/analytics.ts

@@ -374,7 +374,8 @@ export type InboxReportActionType =
   | "view_signal_external"
   | "expand_why"
   | "click_suggested_reviewer"
-  | "expand_task_section";
+  | "expand_task_section"
+  | "play_session_recording";
 
 export type InboxReportActionSurface =
   | "detail_pane"