feat(admin): city delete with impact preview; optional partner fields

Allow deleting open cities after listing partners/stores; company name, address, and districts optional on partner create.

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

apps/admin-web/src/components/CityPartnersPanel.tsx

@@ -383,10 +383,10 @@ export default function CityPartnersPanel({
         }
       }}>
         <Form form={createForm} layout="vertical">
-          <Form.Item name="companyName" label="公司名" rules={[{ required: true }]}><Input /></Form.Item>
+          <Form.Item name="companyName" label="公司名"><Input placeholder="选填" /></Form.Item>
           <Form.Item name="name" label="主账号姓名" rules={[{ required: true }]}><Input /></Form.Item>
           <Form.Item name="phone" label="登录手机号" rules={[{ required: true }]}><Input /></Form.Item>
-          <Form.Item name="address" label="地址" rules={[{ required: true }]}><Input /></Form.Item>
+          <Form.Item name="address" label="地址"><Input placeholder="选填" /></Form.Item>
           <Form.Item name="scopeType" label="管辖类型" rules={[{ required: true }]}>
             <Select options={SCOPE_OPTIONS} onChange={(v) => setCreateScopeType(v)} />
           </Form.Item>
@@ -394,8 +394,7 @@ export default function CityPartnersPanel({
             <Form.Item
               name="districtCodes"
               label="区县"
-              rules={[{ required: true, message: '请选择至少一个区县' }]}
-              extra="仅作标识，可多选当前城市下的区县（不做互斥）"
+              extra="选填；仅作标识，可多选当前城市下的区县（不做互斥）"
             >
               <CityDistrictMultiSelect cityCode={cityCode} />
             </Form.Item>