Add JoinQuant browser backtest automation

plugins/joinquant/README.md

@@ -21,6 +21,21 @@ The plugin validates system mechanics, not alpha quality:
 uv run python cli.py joinquant prepare-smoke \
   --out-dir /tmp/chinese-equity-quant-realdata
 
+uv sync --extra joinquant-browser
+uv run playwright install chromium
+
+uv run python cli.py joinquant browser-login \
+  --storage-state ~/.config/chinese-equity-quant/joinquant_storage_state.json
+
+uv run python cli.py joinquant write-browser-config \
+  --out-path /tmp/chinese-equity-quant-realdata/joinquant_browser_config.json \
+  --strategy-url "https://www.joinquant.com/..."
+
+uv run python cli.py joinquant run-browser-backtest \
+  --manifest-path /tmp/chinese-equity-quant-realdata/joinquant_smoke_manifest.json \
+  --config-path /tmp/chinese-equity-quant-realdata/joinquant_browser_config.json \
+  --storage-state ~/.config/chinese-equity-quant/joinquant_storage_state.json
+
 uv run python cli.py joinquant export-targets \
   --positions-path portfolio/run1.pq \
   --portfolio-name run1 \
@@ -64,3 +79,8 @@ simulator's next-open convention.
 data download, one-stock long-only position file, internal simulation, aligned
 target export, wrapper generation, and a manifest with expected JoinQuant CSV
 export paths.
+
+`run-browser-backtest` automates the remote JoinQuant web run through
+Playwright. It reuses a saved browser login state, executes the configured UI
+actions, downloads JoinQuant CSVs when configured, and runs ingest/reconcile
+automatically once all three CSVs are present.