Add full MCP 2025-11-25 protocol coverage to v2_ux.md

- Add server.json import support (Issue #922) for MCP Registry format
- Add History Screen with automatic capture and replay functionality
- Add Pino logging rationale with log-as-history architecture
- Remove emojis from markdown files, use text alternatives

New UX sections added:
- Logging Screen (notifications/message, logging/setLevel)
- Tasks Screen (tasks/*, notifications/task/statusChanged)
- Sampling Panel (sampling/createMessage)
- Elicitation Handler (form + URL modes)
- Roots Configuration (roots/list)
- Experimental Features Panel (raw JSON-RPC tester)

Enhanced existing screens:
- Tools: annotations, autocomplete, progress indicators, image/audio
- Resources: annotations, subscriptions
- Prompts: autocomplete
- Navigation: ping latency, listChanged indicators

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

specification/v2_tech_stack.md

@@ -39,3 +39,66 @@ Let's step up our logging capability with an advanced logger:
 * -[ ] [Morgan](https://github.com/expressjs/morgan?tab=readme-ov-file#morgan)
 * -[ ] [Log4js](https://github.com/stritti/log4js?tab=readme-ov-file#log4js)
 * -[ ] [Bunyan](https://github.com/trentm/node-bunyan)
+
+#### Pino Rationale
+
+Pino is selected for synergy with the **History Screen** feature. The log file serves dual purposes:
+1. **Server diagnostics** - Standard application logging
+2. **History persistence** - Request/response replay source
+
+**Why Pino over Winston:**
+
+| Requirement | Pino | Winston |
+|-------------|------|---------|
+| Default JSON format | Yes - NDJSON | No - Text (needs config) |
+| Line-by-line parsing | Yes - Native | No - Extra work |
+| High-throughput logging | Yes - Very fast | Partial - Slower |
+| Log rotation | Yes - pino-roll | Yes - winston-daily-rotate |
+| Dev-friendly output | Yes - pino-pretty | Yes - Built-in |
+
+**Architecture:**
+
+```
+┌─────────────────────────────────────────────────────────────────┐
+│                         Proxy Server                            │
+│                                                                 │
+│  MCP Request ──▶ Pino Logger ──┬──▶ history.ndjson (file)       │
+│                                │                                │
+│                                └──▶ Console (pino-pretty)       │
+│                                                                 │
+│  History API: GET /api/history?method=tools/call&limit=50       │
+│  (parses history.ndjson, returns filtered JSON)                 │
+└─────────────────────────────────────────────────────────────────┘
+```
+
+**Log Entry Schema:**
+
+Each MCP operation logs a request/response pair:
+
+```json
+{"ts":1732987200000,"level":"info","type":"mcp_request","method":"tools/call","target":"echo","params":{"message":"hello"},"requestId":"abc123","serverId":"my-server"}
+{"ts":1732987200045,"level":"info","type":"mcp_response","requestId":"abc123","result":{"content":[{"type":"text","text":"hello"}]},"duration":45,"success":true}
+```
+
+**Schema fields:**
+
+| Field | Description |
+|-------|-------------|
+| `ts` | Unix timestamp (ms) |
+| `level` | Log level (info, error) |
+| `type` | `mcp_request` or `mcp_response` |
+| `method` | MCP method (tools/call, resources/read, prompts/get, etc.) |
+| `target` | Tool name, resource URI, or prompt name |
+| `params` | Request parameters |
+| `requestId` | Correlation ID linking request to response |
+| `serverId` | Server identifier |
+| `result` | Response data (for mcp_response) |
+| `error` | Error message (for failed requests) |
+| `duration` | Response time in ms |
+| `success` | Boolean success indicator |
+
+**Dependencies:**
+- `pino` - Core logger
+- `pino-pretty` - Dev console formatting
+- `pino-roll` - Log rotation (optional)
+- `pino-http` - Express integration