feat: Konten umbenennbar, Betrag-Spalte mit Euro im Kopf

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

finance/app/routers/accounts.py

@@ -1,7 +1,7 @@
 from decimal import Decimal
 
 from fastapi import APIRouter, Depends, HTTPException
-from pydantic import BaseModel, ConfigDict
+from pydantic import BaseModel, ConfigDict, field_validator
 from sqlalchemy import select
 from sqlalchemy.orm import Session
 
@@ -27,6 +27,18 @@ class AccountOut(AccountIn):
     balance: Decimal = Decimal("0")
 
 
+class AccountPatch(BaseModel):
+    name: str
+
+    @field_validator("name")
+    @classmethod
+    def name_not_blank(cls, v: str) -> str:
+        v = v.strip()
+        if not v or len(v) > 100:
+            raise ValueError("Name muss 1–100 Zeichen lang sein")
+        return v
+
+
 @router.get("", response_model=list[AccountOut])
 def list_accounts(session: Session = Depends(get_session)):
     out = []
@@ -56,3 +68,16 @@ def create_account(data: AccountIn, session: Session = Depends(get_session)):
     session.commit()
     session.refresh(acc)
     return AccountOut.model_validate(acc)
+
+
+@router.patch("/{account_id}", response_model=AccountOut)
+def patch_account(account_id: int, data: AccountPatch, session: Session = Depends(get_session)):
+    acc = session.get(Account, account_id)
+    if acc is None:
+        raise HTTPException(404, "Konto nicht gefunden")
+    acc.name = data.name
+    session.commit()
+    session.refresh(acc)
+    item = AccountOut.model_validate(acc)
+    item.balance = account_balance(session, acc)
+    return item