Default to DeepSeek V4.1 Flash, show API cost in USD, and re-analyze after replacing BOM and netlist.

V4.1 is natively multimodal so every stage uses deepseek-flash; pricing and the UI now surface dollars instead of empty credits. KiCad netlists and neighborhood fingerprints land in the same cut so a second run can keep the project and skip unchanged ICs.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/test_reopen_replace.py

@@ -0,0 +1,91 @@
+"""Reopen a finished project and replace BOM/netlist without deleting it."""
+
+from __future__ import annotations
+
+from fastapi.testclient import TestClient
+
+from backend.services import projects as proj_svc
+from backend.services.storage import LocalStorageBackend
+
+_BOM_V1 = (
+    b"Reference,Value,Manufacturer Part Number\n"
+    b"U1,MCU,STM32F103C8T6\n"
+)
+_BOM_V2 = (
+    b"Reference,Value,Manufacturer Part Number\n"
+    b"U1,MCU,STM32F103C8T6\n"
+    b"R1,10k,RC0603FR-0710KL\n"
+)
+_NETLIST = b"""*PADS-PCB*
+*PART*
+U1 LQFP48
+*NET*
+*SIGNAL* GND
+U1.1
+*END*
+"""
+
+
+def _client(tmp_path) -> TestClient:
+    from backend.main import app
+
+    app.state.storage = LocalStorageBackend(tmp_path)
+    return TestClient(app)
+
+
+def test_reopen_then_replace_bom_and_netlist(tmp_path):
+    client = _client(tmp_path)
+    meta = client.post("/api/projects", json={"name": "board"}).json()
+    pid = meta["id"]
+
+    resp = client.post(
+        f"/api/projects/{pid}/upload/bom",
+        files={"file": ("bom.csv", _BOM_V1, "text/csv")},
+    )
+    assert resp.status_code == 200, resp.text
+    resp = client.post(
+        f"/api/projects/{pid}/upload/netlist",
+        files={"file": ("netlist.asc", _NETLIST, "text/plain")},
+    )
+    assert resp.status_code == 200, resp.text
+
+    storage = client.app.state.storage
+    proj_svc.update_project(
+        storage, "local", pid,
+        status="complete",
+        total_cost_usd=1.23,
+        summary={"ERROR": 1, "WARNING": 0, "INFO": 0, "total": 1},
+    )
+    prefix = f"users/local/projects/{pid}"
+    storage.write_json(f"{prefix}/report.json", {"findings": []})
+    storage.write_text(f"{prefix}/api_logs.jsonl", '{"cost_usd": 1.23}\n')
+
+    reopen = client.post(f"/api/projects/{pid}/reopen")
+    assert reopen.status_code == 200, reopen.text
+    body = reopen.json()
+    assert body["status"] == "draft"
+    assert body["id"] == pid
+    assert body["has_bom"] is True
+    assert body["has_netlist"] is True
+    assert body["total_cost_usd"] == 1.23
+    assert not storage.exists(f"{prefix}/report.json")
+
+    resp = client.post(
+        f"/api/projects/{pid}/upload/bom",
+        files={"file": ("bom.csv", _BOM_V2, "text/csv")},
+    )
+    assert resp.status_code == 200, resp.text
+    assert resp.json()["components"] == 2
+
+    resp = client.post(
+        f"/api/projects/{pid}/upload/netlist",
+        files={"file": ("netlist.asc", _NETLIST, "text/plain")},
+    )
+    assert resp.status_code == 200, resp.text
+
+    fresh = client.get(f"/api/projects/{pid}").json()
+    assert fresh["id"] == pid
+    assert fresh["status"] == "draft"
+    assert fresh["has_bom"] is True
+    assert fresh["has_netlist"] is True
+    assert "RC0603FR-0710KL" in (fresh.get("component_mpns") or {}).get("passive", [])