feat(core): add Electron runtime, services, and app composition

src/core/services/immersion-tracker/session.ts

@@ -0,0 +1,37 @@
+import crypto from 'node:crypto';
+import type { DatabaseSync } from 'node:sqlite';
+import { createInitialSessionState } from './reducer';
+import { SESSION_STATUS_ACTIVE, SESSION_STATUS_ENDED } from './types';
+import type { SessionState } from './types';
+
+export function startSessionRecord(
+  db: DatabaseSync,
+  videoId: number,
+  startedAtMs = Date.now(),
+): { sessionId: number; state: SessionState } {
+  const sessionUuid = crypto.randomUUID();
+  const result = db
+    .prepare(
+      `
+        INSERT INTO imm_sessions (
+          session_uuid, video_id, started_at_ms, status, created_at_ms, updated_at_ms
+        ) VALUES (?, ?, ?, ?, ?, ?)
+      `,
+    )
+    .run(sessionUuid, videoId, startedAtMs, SESSION_STATUS_ACTIVE, startedAtMs, startedAtMs);
+  const sessionId = Number(result.lastInsertRowid);
+  return {
+    sessionId,
+    state: createInitialSessionState(sessionId, videoId, startedAtMs),
+  };
+}
+
+export function finalizeSessionRecord(
+  db: DatabaseSync,
+  sessionState: SessionState,
+  endedAtMs = Date.now(),
+): void {
+  db.prepare(
+    'UPDATE imm_sessions SET ended_at_ms = ?, status = ?, updated_at_ms = ? WHERE session_id = ?',
+  ).run(endedAtMs, SESSION_STATUS_ENDED, Date.now(), sessionState.sessionId);
+}