diff --git a/apps/web/app/requirements/page.tsx b/apps/web/app/requirements/page.tsx
index 3e84850..ec8f117 100644
--- a/apps/web/app/requirements/page.tsx
+++ b/apps/web/app/requirements/page.tsx
@@ -4,9 +4,11 @@ import { useEffect, useMemo, useState } from 'react';
 import { Search, Plus, Lightbulb, ArrowUp, ArrowDown } from 'lucide-react';
 import { useRequirementStore } from '@/stores/useRequirementStore';
 import { useProductStore } from '@/stores/useProductStore';
+import { useDevTaskStore } from '@/stores/useDevTaskStore';
 import { flattenProjects, flattenVersions } from '@/lib/derive';
 import { REQ_STATUS_LABEL, REQ_STATUS_COLOR, SOURCE_TYPE_LABEL } from '@/lib/requirement';
 import type { Requirement, RequirementStatus, SourceType } from '@/lib/requirement';
+import { deriveReqDevStatus, canEditRequirement, REQ_DEV_STATUS_LABEL, REQ_DEV_STATUS_COLOR } from '@/lib/linkage-engine';
 import { Pagination, usePagination } from '@/components/Pagination';
 import { RequirementModal } from '@/components/requirement/RequirementModal';
 import { RequirementDetail } from '@/components/requirement/RequirementDetail';
@@ -42,6 +44,7 @@ export default function RequirementsPage() {
     addPlatform, updatePlatform, deletePlatform,
   } = useRequirementStore();
   const { overview, fetchOverview } = useProductStore();
+  const { tasks: devTasks, fetchTasks: fetchDevTasks } = useDevTaskStore();
   const allProjects = useMemo(() => flattenProjects(overview), [overview]);
   const allVersions = useMemo(() => flattenVersions(overview), [overview]);
 
@@ -62,6 +65,7 @@ export default function RequirementsPage() {
 
   useEffect(() => { fetchOverview(); }, [fetchOverview]);
   useEffect(() => { fetchRequirements(); }, [fetchRequirements]);
+  useEffect(() => { fetchDevTasks(); }, [fetchDevTasks]);
 
   // Resolve version name from overview
   const resolveVersionName = (versionId?: string): string => {
@@ -249,7 +253,7 @@ export default function RequirementsPage() {
                       <th className="px-4 py-2.5 text-[11px] font-medium uppercase tracking-wide text-[var(--ink-muted)]">状态</th>
                       <th className="px-4 py-2.5 text-[11px] font-medium uppercase tracking-wide text-[var(--ink-muted)]">优先级</th>
                       <th className="px-4 py-2.5 text-[11px] font-medium uppercase tracking-wide text-[var(--ink-muted)]">所属版本</th>
-                      <th className="px-4 py-2.5 text-[11px] font-medium uppercase tracking-wide text-[var(--ink-muted)]">产品负责人</th>
+                      <th className="px-4 py-2.5 text-[11px] font-medium uppercase tracking-wide text-[var(--ink-muted)]">开发状态</th>
                       <th className="px-4 py-2.5 text-[11px] font-medium uppercase tracking-wide text-[var(--ink-muted)]">录入人员</th>
                       <th
                         className="px-4 py-2.5 text-[11px] font-medium uppercase tracking-wide text-[var(--ink-muted)] cursor-pointer select-none hover:text-[var(--ink-soft)] transition-colors"
@@ -314,9 +318,16 @@ export default function RequirementsPage() {
                           {resolveVersionName(req.versionId)}
                         </td>
 
-                        {/* 产品负责人 */}
-                        <td className="px-4 py-3 text-[12px] text-[var(--ink-soft)]">
-                          {req.productOwner || '-'}
+                        {/* 开发状态 */}
+                        <td className="px-4 py-3">
+                          {(() => {
+                            const devStatus = deriveReqDevStatus(req.id, devTasks);
+                            return (
+                              <span className={`inline-flex items-center rounded-md px-2 py-0.5 text-[10px] font-medium ${REQ_DEV_STATUS_COLOR[devStatus]}`}>
+                                {REQ_DEV_STATUS_LABEL[devStatus]}
+                              </span>
+                            );
+                          })()}
                         </td>
 
                         {/* 录入人员 */}
@@ -332,8 +343,8 @@ export default function RequirementsPage() {
                         {/* 操作 */}
                         <td className="px-4 py-3 text-right" onClick={(e) => e.stopPropagation()}>
                           <div className="flex items-center justify-end gap-1">
-                            {/* 编辑：待评审/已采纳/已规划 */}
-                            {(['pending_review', 'adopted', 'planned'] as const).includes(req.status as any) && (
+                            {/* 编辑：待评审/已采纳/已规划，且开发中不可编辑 */}
+                            {(['pending_review', 'adopted', 'planned'] as const).includes(req.status as any) && canEditRequirement(req.id, devTasks) && (
                               <button
                                 onClick={() => handleEdit(req)}
                                 className="h-6 px-2 rounded text-[11px] font-medium text-[var(--ink-soft)] hover:bg-[var(--bg-subtle)] transition-colors"
diff --git a/apps/web/components/layout/Sidebar.tsx b/apps/web/components/layout/Sidebar.tsx
index 6fca363..99e4b0b 100644
--- a/apps/web/components/layout/Sidebar.tsx
+++ b/apps/web/components/layout/Sidebar.tsx
@@ -11,7 +11,7 @@ const NAV_GROUPS = [
       { label: '产品', path: '/products', icon: Package },
       { label: '项目', path: '/projects', icon: FolderKanban },
       { label: '版本', path: '/versions', icon: Tag },
-      { label: '需求', path: '/requirements', icon: Lightbulb },
+      { label: '需求池', path: '/requirements', icon: Lightbulb },
       { label: '加班记录', path: '/overtime', icon: Clock },
     ],
   },
diff --git a/apps/web/components/requirement/RequirementModal.tsx b/apps/web/components/requirement/RequirementModal.tsx
index 9ba765f..8b0771b 100644
--- a/apps/web/components/requirement/RequirementModal.tsx
+++ b/apps/web/components/requirement/RequirementModal.tsx
@@ -115,19 +115,18 @@ export function RequirementModal({
   };
 
   const handleSubmit = () => {
-    if (!title.trim()) return;
+    if (!title.trim() || !productId || !projectId) return;
     onSubmit({
       title: title.trim(),
       description: description.trim(),
       sourceType,
       sourceTarget: sourceTarget || undefined,
-      productId: productId || undefined,
-      projectId: projectId || undefined,
+      productId,
+      projectId,
       versionId: versionId || undefined,
       platforms: selectedPlatforms,
       typeId: typeId || undefined,
       priority,
-      productOwner: productOwner.trim() || undefined,
       parentId: parentId || undefined,
     });
   };
@@ -241,7 +240,7 @@ export function RequirementModal({
           <div className="grid grid-cols-3 gap-3">
             <div>
               <label className="text-[12px] font-medium text-[var(--ink-soft)] mb-1.5 block">
-                所属产品
+                所属产品 <span className="text-red-500">*</span>
               </label>
               <select
                 value={productId}
@@ -256,7 +255,7 @@ export function RequirementModal({
             </div>
             <div>
               <label className="text-[12px] font-medium text-[var(--ink-soft)] mb-1.5 block">
-                所属项目
+                所属项目 <span className="text-red-500">*</span>
               </label>
               <select
                 value={projectId}
@@ -379,20 +378,6 @@ export function RequirementModal({
             </div>
           </div>
 
-          {/* 9. 产品负责人 */}
-          <div>
-            <label className="text-[12px] font-medium text-[var(--ink-soft)] mb-1.5 block">
-              产品负责人
-            </label>
-            <input
-              type="text"
-              value={productOwner}
-              onChange={(e) => setProductOwner(e.target.value)}
-              placeholder="请输入负责人姓名"
-              className="h-9 w-full rounded-lg border border-[var(--line)] bg-[var(--bg-card)] px-3 text-[13px] text-[var(--ink)] placeholder:text-[var(--ink-muted)] outline-none focus:border-[var(--accent)]"
-            />
-          </div>
-
           {/* 10. 关联父需求 */}
           <div>
             <label className="text-[12px] font-medium text-[var(--ink-soft)] mb-1.5 block">
diff --git a/apps/web/lib/linkage-engine.ts b/apps/web/lib/linkage-engine.ts
new file mode 100644
index 0000000..b59b182
--- /dev/null
+++ b/apps/web/lib/linkage-engine.ts
@@ -0,0 +1,52 @@
+import type { DevTask, DevTaskStatus } from './dev-task';
+
+export type ReqDevStatus = 'unscheduled' | 'todo' | 'developing' | 'completed';
+
+export const REQ_DEV_STATUS_LABEL: Record<ReqDevStatus, string> = {
+  unscheduled: '未排期',
+  todo: '待开发',
+  developing: '开发中',
+  completed: '已完成',
+};
+
+export const REQ_DEV_STATUS_COLOR: Record<ReqDevStatus, string> = {
+  unscheduled: 'bg-zinc-100 text-zinc-500',
+  todo: 'bg-amber-50 text-amber-600',
+  developing: 'bg-blue-50 text-blue-600',
+  completed: 'bg-emerald-50 text-emerald-600',
+};
+
+/**
+ * 推导需求的开发状态
+ * 规则：根据关联的 devTasks 状态聚合推导
+ */
+export function deriveReqDevStatus(reqId: string, devTasks: DevTask[]): ReqDevStatus {
+  const tasks = devTasks.filter((t) => t.requirementId === reqId);
+  if (tasks.length === 0) return 'unscheduled';
+  if (tasks.every((t) => t.status === 'submitted')) return 'completed';
+  if (tasks.some((t) => t.status === 'in_progress' || t.status === 'testing')) return 'developing';
+  return 'todo';
+}
+
+/**
+ * 需求是否可编辑
+ * 规则：开发中（有 in_progress 或 testing 的任务）不可编辑
+ */
+export function canEditRequirement(reqId: string, devTasks: DevTask[]): boolean {
+  const status = deriveReqDevStatus(reqId, devTasks);
+  return status !== 'developing';
+}
+
+/**
+ * 需求设置 versionId 的副作用检查
+ * 当需求已有关联的开发任务时，换版本是高风险操作
+ */
+export function checkVersionChangeRisk(reqId: string, devTasks: DevTask[]): { safe: boolean; reason?: string } {
+  const tasks = devTasks.filter((t) => t.requirementId === reqId);
+  if (tasks.length === 0) return { safe: true };
+  const activeTasks = tasks.filter((t) => t.status !== 'submitted');
+  if (activeTasks.length > 0) {
+    return { safe: false, reason: `该需求有 ${activeTasks.length} 个未完成的开发任务，变更版本可能导致数据不一致` };
+  }
+  return { safe: true };
+}
diff --git a/apps/web/lib/requirement.ts b/apps/web/lib/requirement.ts
index 99aafef..9b98c5b 100644
--- a/apps/web/lib/requirement.ts
+++ b/apps/web/lib/requirement.ts
@@ -23,7 +23,7 @@ export interface Requirement {
   title: string;
   description: string;
   productId: string;
-  projectId?: string;
+  projectId: string;
   versionId?: string;
   sourceType: SourceType;
   sourceTarget: string;