feat(scripting): connect give_item to wallet rewards, add [E] Interact prompt and toast feedback

backend/app/routers/wallet.py

@@ -76,3 +76,38 @@ async def get_wallet_transactions(
         limit=limit,
         offset=offset,
     )
+
+
+class RewardRequest(BaseModel):
+    amount: int = Field(..., gt=0, le=10000, description="Amount of Buffalo Chips to reward")
+    reason: str | None = Field(default="in_game_reward", description="Reward source or reason")
+
+
+class RewardResponse(BaseModel):
+    success: bool
+    amount: int
+    new_balance: int
+
+
+@router.post("/reward", response_model=RewardResponse)
+async def reward_chips(
+    payload: RewardRequest,
+    current_user: CurrentUser,
+    db: DbDep,
+):
+    """Credit in-game Buffalo Chips reward directly to the player's wallet."""
+    wallet, tx = await wallet_service.credit(
+        db,
+        user_id=current_user.id,
+        amount=payload.amount,
+        tx_type=TransactionType.admin_adjustment,
+        reference_type="gameplay_reward",
+        reference_id=payload.reason or "in_game_reward",
+        metadata={"reason": payload.reason or "in_game_reward"},
+    )
+    return RewardResponse(
+        success=True,
+        amount=payload.amount,
+        new_balance=wallet.balance,
+    )
+

backend/tests/test_wallet_api.py

@@ -133,3 +133,30 @@ async def test_wallet_service_credit_and_debit_flow():
     # Newest first: debit (-400) first, then credit (+1000)
     assert tx_data["transactions"][0]["amount"] == -400
     assert tx_data["transactions"][1]["amount"] == 1000
+
+
+def test_wallet_reward_endpoint():
+    client = TestClient(app)
+    uid, headers = _register(client, "wallet_reward_user")
+
+    # Initial balance is 0
+    resp = client.get("/api/wallet", headers=headers)
+    assert resp.status_code == 200
+    assert resp.json()["balance"] == 0
+
+    # Reward 25 Buffalo Chips
+    reward_resp = client.post(
+        "/api/wallet/reward",
+        json={"amount": 25, "reason": "found_chest"},
+        headers=headers,
+    )
+    assert reward_resp.status_code == 200
+    data = reward_resp.json()
+    assert data["success"] is True
+    assert data["amount"] == 25
+    assert data["new_balance"] == 25
+
+    # Check updated wallet
+    resp = client.get("/api/wallet", headers=headers)
+    assert resp.json()["balance"] == 25
+