docs: "## Immediate Sync - Page Turn\n\nReal-time progress sync triggered immediately on page turn.\n\n**Method:** POST\n\n**Endpoint:** /api/sync/koreader/progress\n\n**Authentication:** Bearer token\n\n**Request Body:**\n- `sync_mode` (string): Must be `immediate`\n- `books` (array): Current book progress\n  - `uuid` (string): Book UUID\n  - `percentage` (number): Precise progress (0.45678 = 45.678%)\n  - `chapter` (integer): Current chapter\n  - `timestamp` (string): ISO 8601 timestamp\n  - `epubcfi` (string, optional): Current position\n  - `page` (integer, optional): Current page\n\n**Response:**\n- `synced` (boolean): Immediate sync status\n- `timestamp` (string): Server timestamp\n- `next_sync_suggested` (string): Suggested next sync time\n\n**Status Codes:**\n- 200: Sync queued\n- 202: Accepted for processing\n- 401: Unauthorized\n- 429: Too many immediate sync requests (rate limited)\n\n**Immediate Sync Mode:**\n- **Purpose**: Real-time progress updates\n- **Trigger**: Every page\
  \ turn (configurable)\n- **Priority**: High priority processing\n- **Latency**: <100ms typical\n- **Best effort**: May be queued under load\n\n**Rate Limiting:**\n- Max 60 requests per minute per device\n- Throttled after limit reached\n- Suggests switching to periodic sync\n- Prevents server overload\n\n**Use Cases:**\n- Real-time multi-device reading\n- Live progress sharing\n- Instant position backup\n- Critical reading points\n- Test/profiling mode\n\n**Performance:**\n- Ultra-fast sync\n- Minimal payload\n- Optimized for speed\n- Async processing\n- No confirmation wait\n\n**Battery Considerations:**\n- More frequent network use\n- Higher battery consumption\n- WiFi recommended\n- Can reduce sync frequency in settings\n\n**Configuration:**\n- Can enable/disable per device\n- Adjustable frequency (every page, every N pages)\n- Automatic fallback to periodic sync on error\n- Respects device power-save mode\n\n**When to Use:**\n- Critical reading sessions\n- Multi-device concurrent reading\n\
  - Research and study\n- Testing sync functionality\n- When power source available\n\n**When NOT to Use:**\n- Battery conservation needed\n- Unstable network\n- Extended reading sessions\n- Background sync preferred"
http:
  body:
    type: json
    data: "{\n  \"books\": [\n    {\n      \"chapter\": 3,\n      \"percentage\": 0.45678,\n      \"timestamp\": \"2026-01-30T20:00:00Z\",\n      \"uuid\": \"{{media_item_id}}\"\n    }\n  ],\n  \"sync_mode\": \"immediate\"\n}"
  headers:
  - key: Content-Type
    value: application/json
  method: POST
  url: '{{base_url}}/api/sync/koreader/progress'
  auth:
    type: bearer
    token: '{{koreader_device_token}}'
info:
  name: Immediate Sync - Page Turn
  seq: 10
  type: http