feat(project): 项目基本信息修改和分包选择（FR-M2-03、04）

- 字段修改：人工值优先、撤销恢复 AI 值、按字段校验（金额可写「286万」，按元存）、
  冗余列同步、审计留痕、只读项目 409；关键日期显示改后的投标截止时间
- 分包：增删改、选包（至少一个）、一键「不分包」；删包时条目归为通用，删到一个不剩回到不分包
- 清单列表 lot_scope 默认只列通用 + 所投的包，响应带 hidden_count
- 检查记下当时用的项目依据（截止时间、限价、所投的包、法律体系）：报告按它写，
  之后改了信息检查结果接口给 basis_changed，查标页提示重新检查
- 前端：概览标签页（项目要点、采购包、关键日期）、字段修改对话框、选包页和手工调整；
  解析完识别到多个包时进选包页；读标页清单范围和所属采购包；查标页写明查哪几个包
- 决策 PI1–PI7；方案和落地记录 docs/architecture/project-info-plan.md

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

apps/web/src/components/ItemDialog.vue

@@ -12,13 +12,14 @@ import { computed, ref, watch } from "vue";
 import { errorTitle, isApiError } from "@/lib/api";
 import type { ItemFields } from "@/lib/checklistOps";
 import { category, CATEGORY_ORDER, IMPORTANCE_MARK, IMPORTANCE_NAME } from "@/lib/labels";
-import type { ChecklistItem } from "@/lib/queries";
+import type { ChecklistItem, Lot } from "@/lib/queries";
 
 type Mode = "edit" | "accept" | "create";
 type Cat = ChecklistItem["categories"][number];
 type Imp = ChecklistItem["importance"];
 
-const props = defineProps<{ mode: Mode; item?: ChecklistItem | null; defaultCategory?: Cat }>();
+/** lots：项目的分包（不含默认包）；有 2 个及以上时可以改条目归属哪个包（FR-M2-04） */
+const props = defineProps<{ mode: Mode; item?: ChecklistItem | null; defaultCategory?: Cat; lots?: Lot[] }>();
 const open = defineModel<boolean>("open", { required: true });
 const emit = defineEmits<{
   /** 提交：changes 只含改过的字段；ack = 人工确认、无出处 */
@@ -32,6 +33,7 @@ const cats = ref<Cat[]>([]);
 const imp = ref<Imp>("normal");
 const evidence = ref("");
 const reqText = ref("");
+const lotId = ref<string | null>(null);
 const ack = ref(false);
 const busy = ref(false);
 const err = ref("");
@@ -46,6 +48,7 @@ watch(open, (v) => {
   imp.value = i?.importance ?? "normal";
   evidence.value = i?.evidence_required ?? "";
   reqText.value = i?.requirement_text ?? "";
+  lotId.value = i?.lot_id ?? null;
   ack.value = false;
   err.value = titleErr.value = catErr.value = "";
 });
@@ -75,6 +78,7 @@ function changes(): ItemFields {
   if (!i || imp.value !== i.importance) out.importance = imp.value;
   const ev = evidence.value.trim() || null;
   if (ev !== (i?.evidence_required ?? null)) out.evidence_required = ev;
+  if ((props.lots?.length ?? 0) > 1 && lotId.value !== (i?.lot_id ?? null)) out.lot_id = lotId.value;
   const rt = reqText.value.trim() || null;
   if (reqEditable.value && rt !== (i?.requirement_text ?? null)) out.requirement_text = rt;
   return out;
@@ -129,6 +133,13 @@ function submit() {
               </div>
               <span v-if="imp === 'substantive'" class="msg">★ 条款不满足就会被判无效，已同时归在「无效条款」</span>
             </div>
+            <div v-if="(lots?.length ?? 0) > 1" class="field fill">
+              <label for="it-lot">所属采购包</label>
+              <select id="it-lot" v-model="lotId" class="input">
+                <option :value="null">各包通用</option>
+                <option v-for="l in lots" :key="l.id" :value="l.id">采购包 {{ l.lot_no }}<template v-if="l.name"> · {{ l.name }}</template></option>
+              </select>
+            </div>
             <div class="field fill">
               <label for="it-ev">证明材料 <small>（选填）</small></label>
               <input id="it-ev" v-model="evidence" class="input" placeholder="如「提供营业执照副本复印件并加盖公章」" />