bugfix speech-to-text and implement avatar and personal greeting

backend/app/routers/chat.py

@@ -5,12 +5,13 @@ import logging
 
 from fastapi import APIRouter, Depends
 from fastapi.responses import StreamingResponse
+from sqlalchemy import select, func
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.auth import get_current_user
 from app.database import get_db
-from app.models import User
-from app.schemas import ChatRequest
+from app.models import Instruction, User
+from app.schemas import ChatRequest, DashboardOut
 from app.services.instruction_service import get_system_prompt
 from app.services.llm_service import chat_stream
 
@@ -19,6 +20,21 @@ logger = logging.getLogger("fluentgerman.chat")
 router = APIRouter(prefix="/api/chat", tags=["chat"])
 
 
+@router.get("/dashboard", response_model=DashboardOut)
+async def dashboard(
+    user: User = Depends(get_current_user),
+    db: AsyncSession = Depends(get_db),
+):
+    """Return personalised dashboard data: username + latest instruction date."""
+    result = await db.execute(
+        select(func.max(Instruction.created_at)).where(
+            (Instruction.user_id == user.id) | Instruction.user_id.is_(None)
+        )
+    )
+    latest = result.scalar_one_or_none()
+    return DashboardOut(username=user.username, latest_instruction_at=latest)
+
+
 @router.post("/")
 async def chat(
     body: ChatRequest,