fix: 新项目售价299和批量1持久化到后端

- 后端存储selling_price/packaging_cost/labor_cost/other_cost/quantity到pricing字段(JSON)
- 加载时解析并返回给前端
- 新建时也保存这些字段

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

backend/main.py

@@ -1242,17 +1242,32 @@ def list_projects():
     conn = get_db()
     rows = conn.execute("SELECT * FROM profit_projects ORDER BY id DESC").fetchall()
     conn.close()
-    return [{ **dict(r), "ingredients": json.loads(r["ingredients"]) } for r in rows]
+    result = []
+    for r in rows:
+        d = dict(r)
+        d["ingredients"] = json.loads(r["ingredients"])
+        try:
+            extra = json.loads(r["pricing"]) if r["pricing"] else {}
+            if isinstance(extra, dict):
+                d.update(extra)
+        except (json.JSONDecodeError, TypeError):
+            pass
+        result.append(d)
+    return result
 
 
 @app.post("/api/projects", status_code=201)
 def create_project(body: dict, user=Depends(require_role("admin", "senior_editor"))):
     conn = get_db()
     c = conn.cursor()
+    extra = {}
+    for k in ("selling_price", "packaging_cost", "labor_cost", "other_cost", "quantity"):
+        if k in body:
+            extra[k] = body[k]
     c.execute(
         "INSERT INTO profit_projects (name, ingredients, pricing, note, created_by) VALUES (?, ?, ?, ?, ?)",
         (body["name"], json.dumps(body.get("ingredients", []), ensure_ascii=False),
-         body.get("pricing", 0), body.get("note", ""), user["id"])
+         json.dumps(extra) if extra else '{}', body.get("note", ""), user["id"])
     )
     conn.commit()
     pid = c.lastrowid
@@ -1272,6 +1287,14 @@ def update_project(pid: int, body: dict, user=Depends(require_role("admin", "sen
         conn.execute("UPDATE profit_projects SET pricing = ? WHERE id = ?", (body["pricing"], pid))
     if "note" in body:
         conn.execute("UPDATE profit_projects SET note = ? WHERE id = ?", (body["note"], pid))
+    # Store extra cost fields in pricing as JSON
+    extra = {}
+    for k in ("selling_price", "packaging_cost", "labor_cost", "other_cost", "quantity"):
+        if k in body:
+            extra[k] = body[k]
+    if extra:
+        conn.execute("UPDATE profit_projects SET pricing = ? WHERE id = ?",
+                     (json.dumps(extra, ensure_ascii=False), pid))
     conn.commit()
     conn.close()
     return {"ok": True}