恢复被 #193 误删的策划前端全部样式，并加上组件到样式的守门测试

症状：立项策划界面整体裸奔——审批卡、阶段进度条、交付行没有任何框和布局，
「查看 GDD 正文」弹层因 backdrop 丢掉 fixed 定位而内联平铺进消息流。

成因：策划前端经 squash PR #159 完整进入 master，组件(TSX)至今与源分支最终态
逐字节一致；随后 #193「Codex/agent chat layout fix」重写聊天区样式时，把
styles.css 里策划前端的选择器整段删除——gdd-approval-card 34 条、plan-gdd* 17
条、planning-lane-runtime-strip 上限——未搬往任何其他文件（全仓检索为 0）。同一
个 PR 把 project-development.suite.ts 大幅重写，原有的 CSS 守门断言一并消失，
所以没有任何测试变红。

修复：从 5802048c3^ 原样取回全部 42 个规则块，整段追加在 styles.css 末尾并注明
来历。这些选择器在当前文件中出现次数为 0，纯加法、零冲突，不触碰 #193/#194 有意
重构的聊天区规则；追加在末尾也保持了原有的同权重覆盖关系（策划窄条的上限仍压过
调试面板的 240px 天花板）。

守门：plan-gdd.suite.ts（两轮样式重构都未被触碰的文件）新增一条测试，类名清单
直接从 GddApprovalCard / PlanningLaneRuntimeStrip 源码推导，逐个断言 styles.css
里有对应规则，另单独锁弹层 backdrop 的 fixed 定位。A/B 验证：抽掉恢复段即红，报
「styles.css 缺少 .plan-gdd-surface 的规则」。组件加新类而样式缺失、或样式再次
被顺手清理，这条都会拦住。

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

apps/ai-game-creator-shell/src/styles.css

@@ -7209,3 +7209,313 @@ iframe.preview-frame {
     grid-column: 1 / -1;
   }
 }
+
+
+/* ============================================================
+   立项策划前端样式（PlanGddSurface / 阶段进度 / GDD 审批卡 / 交付行 /
+   planning-lane-runtime-strip）。
+   这一段曾在 #193「Codex/agent chat layout fix」重写聊天样式时被整体误删：
+   组件(TSX)原样保留、选择器全数消失，策划界面裸奔、正文弹层失去 fixed 定位
+   变成内联平铺。从 5802048c3^ 原样恢复。聊天区样式重构时请勿顺手清理本段——
+   这些选择器的使用方在 features/project-workspace/GddApprovalCard.tsx 与
+   PlanningLaneRuntimeStrip.tsx。
+   ============================================================ */
+
+/* 策划区是一个面：阶段进度是标题栏，审批卡是正文。边框和圆角只画在外壳上，里面两块
+   不再各自带框。 */
+.plan-gdd-surface{
+  display: grid;
+  min-width: 0;
+  border: 1px solid #cfd7e6;
+  border-radius: 10px;
+  background: #fff;
+  overflow: hidden;
+}
+
+.gdd-approval-card{
+  display: grid;
+  gap: 14px;
+  padding: 16px 18px 18px;
+  background: #f8fbff;
+}
+
+.plan-gdd-surface--with-card .plan-gdd-stage-progress{
+  border-bottom: 1px solid #dbe4f1;
+}
+
+.plan-gdd-stage-progress{
+  display: grid;
+  gap: 6px;
+  padding: 10px 12px;
+  background: #fff;
+  color: #526173;
+  font-size: 12px;
+}
+
+.plan-gdd-stage-progress__header,
+.plan-gdd-stage-progress__meta{
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  justify-content: space-between;
+  gap: 8px 14px;
+}
+
+/* 批准后的交付行。它是策划阶段唯一的产物出口，所以给一条分隔线把它和上面的状态
+   区分开，而不是混成第三行元信息。 */
+.plan-gdd-stage-progress__delivery{
+  display: grid;
+  gap: 8px;
+  margin-top: 4px;
+  padding-top: 9px;
+  border-top: 1px solid #e6ecf5;
+}
+
+.plan-gdd-stage-progress__delivery code{
+  min-width: 0;
+  color: #3c4a5c;
+  font-size: 11px;
+  overflow-wrap: anywhere;
+}
+
+.plan-gdd-stage-progress__delivery-actions{
+  display: flex;
+  flex-wrap: wrap;
+  gap: 8px;
+}
+
+.plan-gdd-stage-progress__delivery-actions button{
+  min-height: 30px;
+  padding: 0 12px;
+  border: 1px solid #cfd7e6;
+  border-radius: 6px;
+  color: #27364a;
+  background: #fff;
+  font-size: 12px;
+}
+
+.plan-gdd-stage-progress__delivery-actions button:hover:not(:disabled),
+.plan-gdd-stage-progress__delivery-actions button:focus-visible{
+  border-color: #1f6feb;
+  color: #1f6feb;
+}
+
+.plan-gdd-stage-progress__delivery-actions button:disabled{
+  opacity: 0.58;
+}
+
+.plan-gdd-stage-progress__delivery-error{
+  color: #b42323;
+  overflow-wrap: anywhere;
+}
+
+.plan-gdd-stage-progress__header strong{
+  color: #27364a;
+}
+
+.plan-gdd-stage-progress__header span{
+  padding: 3px 8px;
+  border-radius: 999px;
+  background: #eef6ff;
+  color: #1f6feb;
+}
+
+.gdd-approval-card__header{
+  display: grid;
+  gap: 5px;
+  min-width: 0;
+}
+
+.gdd-approval-card h2,
+.gdd-approval-card h3,
+.gdd-approval-card p{
+  margin: 0;
+}
+
+.gdd-approval-card h2{
+  font-size: 18px;
+}
+
+.gdd-approval-card__header p{
+  color: #526173;
+  overflow-wrap: anywhere;
+}
+
+.gdd-approval-card__details-trace{
+  color: #6b7a8c;
+  font-size: 11px;
+  overflow-wrap: anywhere;
+}
+
+.gdd-approval-card__details-trigger{
+  justify-self: start;
+  min-height: 30px;
+  padding: 0 10px;
+  border: 1px solid #cfd7e6;
+  border-radius: 6px;
+  color: #27364a;
+  background: #fff;
+}
+
+.gdd-approval-card__decisions{
+  display: grid;
+  gap: 8px;
+}
+
+.gdd-approval-card__decisions article{
+  display: grid;
+  gap: 3px;
+  padding: 9px 10px;
+  border: 1px solid #e2e8f0;
+  border-radius: 7px;
+  background: #fff;
+}
+
+.gdd-approval-card__decisions article span{
+  color: #1f6feb;
+  font-size: 12px;
+}
+
+.gdd-approval-card__decisions article small{
+  color: #526173;
+  overflow-wrap: anywhere;
+}
+
+.gdd-approval-card__actions,
+.gdd-approval-card__dialog-actions,
+.gdd-approval-card__recovery{
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  gap: 8px;
+}
+
+.gdd-approval-card__actions button,
+.gdd-approval-card__dialog-actions button,
+.gdd-approval-card__recovery button{
+  min-height: 32px;
+  padding: 0 12px;
+  border: 1px solid #cfd7e6;
+  border-radius: 6px;
+  color: #fff;
+  background: #1f6feb;
+}
+
+.gdd-approval-card__actions button:nth-child(n + 2),
+.gdd-approval-card__dialog-actions button:first-child{
+  color: #27364a;
+  background: #fff;
+}
+
+.gdd-approval-card button:disabled{
+  cursor: not-allowed;
+  opacity: 0.55;
+}
+
+.gdd-approval-card__recovery{
+  justify-content: space-between;
+  padding: 9px 10px;
+  border-radius: 7px;
+  color: #854d0e;
+  background: #fff7df;
+  font-size: 13px;
+}
+
+.gdd-approval-card__error{
+  padding: 9px 10px;
+  border-radius: 7px;
+  color: #991b1b;
+  background: #fff1f2;
+  overflow-wrap: anywhere;
+}
+
+.gdd-approval-card__dialog-backdrop{
+  position: fixed;
+  inset: 0;
+  z-index: 220;
+  display: grid;
+  padding: 24px;
+  background: rgb(0 0 0 / 56%);
+  place-items: center;
+}
+
+.gdd-approval-card__dialog{
+  display: grid;
+  gap: 12px;
+  width: min(520px, 100%);
+  padding: 20px;
+  border: 1px solid #e5e7eb;
+  border-radius: 8px;
+  background: #fff;
+  box-shadow: 0 18px 52px rgb(0 0 0 / 18%);
+}
+
+.gdd-approval-card__details{
+  max-height: min(760px, calc(100vh - 32px));
+  overflow: auto;
+}
+
+.gdd-approval-card__details header,
+.gdd-approval-card__details article{
+  display: grid;
+  gap: 5px;
+}
+
+.gdd-approval-card__details article{
+  padding-top: 10px;
+  border-top: 1px solid #e2e8f0;
+}
+
+.gdd-approval-card__details p{
+  white-space: pre-line;
+  overflow-wrap: anywhere;
+}
+
+.gdd-approval-card__dialog textarea{
+  width: 100%;
+  min-height: 110px;
+  padding: 9px;
+  border: 1px solid #cfd7e6;
+  border-radius: 6px;
+  resize: vertical;
+}
+
+.gdd-approval-card__dialog-hint{
+  padding: 9px 10px;
+  border-radius: 7px;
+  color: #854d0e;
+  background: #fff7df;
+  font-size: 13px;
+}
+
+/* 审批卡是这一列里唯一没有天花板的成员：Fast GDD 的决定项越多它越高，能把消息列表和运行
+   时面板一起挤出可视区。和 `.agent-runtime-status` 一样给它自己的上限加内部滚动，而不是
+   让它去挤别人。 */
+/* 这个面不参与 flex 压缩。它自己不会长高：标题栏是固定几行，审批卡下面有自己的
+   max-height 和内滚，所以高度天然有界。让它可压缩的话，`overflow: hidden`（画圆角
+   要的）会把底部切掉——批准后交付行正好在那儿，表现是路径和两个按钮凭空消失。 */
+.game-workbench-chat .plan-gdd-surface{
+  flex: 0 0 auto;
+}
+
+/* 只有审批卡在场时才需要「标题栏定高 + 正文占余下」的两行轨道。批准后卡片收掉，
+   面里只剩标题栏，这条声明会给它套上一个不存在的第二行。 */
+.game-workbench-chat .plan-gdd-surface--with-card{
+  min-height: 0;
+  grid-template-rows: auto minmax(0, 1fr);
+}
+
+.game-workbench-chat .gdd-approval-card{
+  min-height: 0;
+  max-height: clamp(240px, 52dvh, 640px);
+  overflow-y: auto;
+  overscroll-behavior: contain;
+  scrollbar-gutter: stable;
+}
+
+/* 上面 24dvh/240px 的天花板是给做游戏链路常驻的调试面板设的。策划链路的窄条只在
+   需要用户动手时出现（澄清卡 / 失败恢复），内容是要读完再回答的题面，给它和审批
+   卡同级的空间。 */
+.game-workbench-chat .planning-lane-runtime-strip{
+  max-height: clamp(240px, 52dvh, 640px);
+}

apps/ai-game-creator-shell/tests/appSurface/plan-gdd.suite.ts

@@ -1,3 +1,6 @@
+import { readFileSync } from 'node:fs';
+import { resolve } from 'node:path';
+
 import {
   agentRuntimeUserInputRequest,
   createPlanGddStateView,
@@ -521,4 +524,50 @@ export function registerPlanGddApprovalTests() {
     expectSupervisorRuntimePanelAbsent();
     expect(screen.queryByText('策划子 Run 退出')).toBeNull();
   });
+
+  it('keeps a stylesheet rule for every class the planning components reference', () => {
+    // #193「Codex/agent chat layout fix」重写聊天样式时，把策划前端的选择器整段
+    // 误删：组件(TSX)原样保留、样式全数消失，审批卡/阶段条/交付行裸奔，正文弹层
+    // 失去 fixed 定位变成内联平铺。组件和它的样式分居两个文件，重构样式的人看不见
+    // 使用方——这条测试就是那根缺失的连线：类名清单直接从组件源码里推导，组件加了
+    // 新类而样式没跟上、或样式又被顺手清掉，这里都会红。
+    const componentSources = [
+      'src/features/project-workspace/GddApprovalCard.tsx',
+      'src/features/project-workspace/PlanningLaneRuntimeStrip.tsx',
+    ]
+      .map((path) =>
+        readFileSync(
+          resolve(process.cwd(), 'apps/ai-game-creator-shell', path),
+          'utf8',
+        ),
+      )
+      .join('\n');
+    const referencedClasses = new Set<string>();
+    for (const match of componentSources.matchAll(
+      /className=(?:"([^"]+)"|\{`([^`]+)`\})/g,
+    )) {
+      const literal = (match[1] ?? match[2] ?? '').replace(/\$\{[^}]*\}/g, ' ');
+      for (const name of literal.split(/\s+/)) {
+        if (name) {
+          referencedClasses.add(name);
+        }
+      }
+    }
+    expect(referencedClasses.size).toBeGreaterThan(10);
+    const styles = readFileSync(
+      resolve(process.cwd(), 'apps/ai-game-creator-shell/src/styles.css'),
+      'utf8',
+    );
+    for (const name of referencedClasses) {
+      expect(
+        styles.includes(`.${name}`),
+        `styles.css 缺少 .${name} 的规则`,
+      ).toBe(true);
+    }
+    // 正文弹层必须是浮层：backdrop 一旦丢掉 fixed 定位，整个 GDD 会内联平铺进
+    // 消息流里——这正是误删当时最刺眼的症状。
+    expect(styles).toMatch(
+      /\.gdd-approval-card__dialog-backdrop\s*\{[^}]*position:\s*fixed/s,
+    );
+  });
 }