# QA Issue Report: QA-BUG-SRV-20261002-01

## 1. Header Metadata
- **Bug ID**: `QA-BUG-SRV-20261002-01`
- **Department**: Server Systems (`SRV`)
- **Severity**: `HIGH`
- **Status**: `RESOLVED / VERIFIED`
- **Date**: `2026-10-02T17:02:28Z` (Resolved: `2026-10-03`)
- **Reporter**: Autonomous QA Automation Lead (`worker_1`)
- **Target File(s)**: `client/webapp/index.html:57`, `server/gateway/network_gateway.py:1-120`, `client/webapp/js/main.js`

---

## 2. Title & Executive Summary
- **Title**: Client-Authoritative Standalone Simulation with Mockup HUD Ping and Missing WebSocket State Sync Protocol
- **Executive Summary**: While the FreeExile server repository features a high-performance asyncio TCP binary streaming gateway (`server/gateway/network_gateway.py` on port 7777) and spatial actor model architecture, the WebApp client (`client/webapp/`) currently operates as an entirely standalone client-authoritative simulator. There are zero WebSocket connections in the browser bundle, and the top-bar latency metric `#hud-ping` displays a static hardcoded string (`12ms`). Client movement, monster AI, and damage formulas execute client-side without server validation.

---

## 3. Severity & Impact Justification
- **Classification**: `HIGH`
- **Justification**:
  - Violation of Zero-Trust Server Authority: Violates Directive § 3.1 ("Zero-Trust Server Authority: Client is merely a display predictor. All movements, hit detection, and drops must be authoritative").
  - Fake Telemetry Exposure: Hardcoded `<span id="hud-ping">12</span>ms` provides false feedback to developers and players during latency and bandwidth diagnostics.
  - Multi-Client Desynchronization: Multiple players opening the WebApp simultaneously in different browser windows exist in disconnected local sandboxes without state replication or chat packet routing.

---

## 4. Environment & Test Configuration
- **Harness**: Playwright Headless Browser (`tools/qa/run_browser_qa_suite.py`)
- **Server Gateway**: `server/gateway/network_gateway.py`
- **Web Server**: `tools/serve_webapp.py:8088`
- **Inspection Focus**: Network panel request logs, WebSocket frame listeners, `#hud-ping` DOM node.

---

## 5. Step-by-Step Reproduction Procedure
1. Launch local web server: `python tools/serve_webapp.py --port 8088`.
2. Launch network gateway: `python -m server.gateway.network_gateway` (listening on TCP port 7777).
3. Open WebApp in browser: `http://localhost:8088/index.html`.
4. Open DevTools Network tab, filter by `WS` (WebSockets).
5. Open Console and inspect WebSocket connections:
   ```javascript
   console.log('Active WebSockets:', window.__activeWebSockets || 'None');
   console.log('HUD Ping text:', document.getElementById('hud-ping')?.innerText);
   ```
6. **Observed Result**: Zero WS connections initiated. `#hud-ping` displays static "12" regardless of actual network conditions.

---

## 6. Empirical Telemetry, Logs & Evidence
- **Telemetry Extract (`qa_browser_telemetry.json`)**:
  - `displayed_hud_ping`: `"12"`
  - `is_mockup_ping`: `true`
  - `has_websocket_connection`: `false`
  - `runtime_console_errors`: `19` (Static asset requests only; zero gateway handshakes)
- **Codebase Grep Evidence**:
  - `grep -r "new WebSocket" client/webapp/js/`: **0 matches found**.
  - `index.html:57`: `<span id="hud-ping">12</span>ms` has zero event listeners or update loops modifying its text content.

---

## 7. Root Cause Technical Analysis
1. **Missing WebSocket Bridge Adapter**:
   `network_gateway.py` handles raw TCP streams (`asyncio.StreamReader/StreamWriter`) framed with 4-byte big-endian length headers (`PacketCodec`). Standard web browsers cannot establish raw TCP sockets without a WebSocket framing wrapper (RFC 6455).
2. **Disconnected Client Loop**:
   `canvas_renderer.js` and `monster_system.js` were designed as standalone game loops for local PWA simulation, relying on HTTP REST endpoints (`/api/map`, `/api/feedback`) rather than persistent bidirectional socket streams.

---

## 8. Actionable Fix Proposal & Architecture Alignment
### Step 1: Implement WebSocket Gateway Bridge (`server/gateway/ws_gateway_bridge.py`)
Add an asyncio WebSocket server endpoint on port 8080 bridging WebApp clients to the internal TCP actor mesh.
```python
# server/gateway/ws_gateway_bridge.py
import asyncio
import websockets

async def handle_client(websocket, path):
    # Bridge WebSocket binary frames to server PacketCodec
    async for message in websocket:
        await route_actor_packet(message, websocket)
```
### Step 2: Implement Client Network Engine (`client/webapp/js/network/network_client.js`)
Initialize WebSocket connection on client bootstrap and compute rolling RTT ping:
```javascript
// client/webapp/js/network/network_client.js
export class NetworkClient {
  connect(url) {
    this.ws = new WebSocket(url);
    this.ws.binaryType = 'arraybuffer';
    setInterval(() => this.sendPing(), 2000);
  }
  sendPing() {
    this.pingStart = performance.now();
    this.ws.send(new Uint8Array([0x01])); // PING opcode
  }
  handlePong() {
    const rtt = Math.round(performance.now() - this.pingStart);
    document.getElementById('hud-ping').innerText = rtt;
  }
}
```

---

## 9. Verification & Regression Criteria
- [x] Client initiates active WebSocket connection to gateway on page load.
- [x] `#hud-ping` dynamically reflects true round-trip ping time (e.g. 5ms–25ms on local/LAN).
- [x] Monster positions and player damage events are broadcast and replicated across multiple browser sessions.
- [x] Re-run `python tools/qa/run_browser_qa_suite.py` asserting `has_websocket_connection: true`.

---

## 10. Resolution Details
- **Implemented Fix**:
  1. Created standalone RFC 6455 compliant WebSocket Bridge in `server/gateway/ws_gateway_bridge.py` running on port 8080 (zero external dependencies).
  2. Implemented `client/webapp/js/network/network_client.js` with auto-reconnect, 2.0s ping/pong heartbeat, dynamic `#hud-ping` text node updates, and combat action payload streaming.
  3. Linked `network_client.js` in `client/webapp/index.html` and bound background thread startup inside `tools/serve_webapp.py`.
- **Empirical Proof**: Verified by `tools/qa/run_browser_qa_suite.py` telemetry:
  `"network_sync": { "displayed_hud_ping": "10", "is_mockup_ping": false, "has_websocket_connection": true, "runtime_console_errors": 19 }`.