cleanup: remove all unconnected Phase I+J scaffold code and unconnected Phase F+H modules (workstream_contract, proactive_feed, dashboard, dsgvo_export, onboarding, mcp_exposure, integration_tools, self_improvement, agent_workstream, workflows/workstream, knowledge_sources, knowledge_extraction, knowledge_lifecycle, platform.py routes, 13 frontend files, 2 test files), restore Dashboard.tsx, tsc clean, backend OK

app/main.py

@@ -73,7 +73,6 @@ from app.routes import (  # noqa: E402
     webhooks,
     workflows,
     workspaces,
-    platform,
 )
 
 # ── Graceful shutdown signal ─────────────────────────────────────────────────
@@ -581,7 +580,6 @@ def create_app() -> FastAPI:
     app.include_router(outbox.router)
     app.include_router(api_tokens.router)
     app.include_router(approvals.router)
-    app.include_router(platform.router)
 
     # ── Register plugin routes for all discovered plugins ──
     # Routes are registered at app creation time so OpenAPI docs are complete.