Add Deep Agents UI, pipeline fixes, and agent improvements.

Includes deep-agents-ui integration, rework detection via Gitea,
tool-call sanitization fixes, and startup scripts.

scripts/start_langgraph.ps1

@@ -0,0 +1,27 @@
+# Запуск LangGraph API для brojs-agent
+$ErrorActionPreference = "Stop"
+$Root = Split-Path -Parent $PSScriptRoot
+Set-Location $Root
+
+$env:PYTHONUTF8 = "1"
+$env:PYTHONIOENCODING = "utf-8"
+
+$venvPython = Join-Path $Root "venvv\Scripts\python.exe"
+$venvLanggraph = Join-Path $Root "venvv\Scripts\langgraph.exe"
+if (Test-Path $venvPython) {
+    $python = $venvPython
+    $langgraph = $venvLanggraph
+} else {
+    $python = "python"
+    $langgraph = "langgraph"
+}
+
+& $python -m pip show langgraph-cli 2>$null | Out-Null
+if ($LASTEXITCODE -ne 0) {
+    Write-Host "Installing langgraph-cli..."
+    & $python -m pip install "langgraph-cli[inmem]"
+}
+
+Write-Host "Starting LangGraph dev server on http://127.0.0.1:2024"
+Write-Host "Graphs: agent (chat), pipeline (batch)"
+& $langgraph dev --allow-blocking --port 2024