Fix desktop chat UX and add PR regression gates / 修复桌面聊天体验并增加 PR 回归门禁

.github/PULL_REQUEST_TEMPLATE.md

@@ -15,6 +15,8 @@
 ## Checklist
 
 - [ ] `npm run verify` passes locally (lint + typecheck + tests + comment-policy gate)
+- [ ] If desktop UI changed: `npm run verify:desktop` passes
+- [ ] If desktop UI changed: buttons, popovers, sidebars, and chat auto-scroll were checked at narrow desktop widths
 - [ ] No `Co-Authored-By: Claude` trailer in commits
 - [ ] Comments follow CONTRIBUTING.md (no module-essay headers, no incident history)
 - [ ] No edits to `CHANGELOG.md` — release notes are maintainer-written at release time

.github/workflows/ci.yml

@@ -23,10 +23,16 @@ jobs:
         with:
           node-version: ${{ matrix.node }}
           cache: npm
+          cache-dependency-path: |
+            package-lock.json
+            desktop/package-lock.json
 
       - name: Install dependencies
         run: npm ci
 
+      - name: Install desktop dependencies
+        run: npm ci --prefix desktop
+
       - name: Lint (biome)
         run: npm run lint
 
@@ -36,6 +42,9 @@ jobs:
       - name: Build (tsup + dashboard)
         run: npm run build
 
+      - name: Build desktop
+        run: npm run build:desktop
+
       - name: Test (vitest + coverage)
         run: npm run test:coverage
 

desktop/src/App.test.ts

@@ -396,14 +396,14 @@ describe("desktop thread layout", () => {
     const side = 244;
     const ctx = 320;
 
-    expect(
-      getThreadMaxWidth({ viewportWidth: 1000, visibleSide: side, visibleCtx: ctx }),
-    ).toBe(580);
-    expect(
-      getThreadMaxWidth({ viewportWidth: 1400, visibleSide: side, visibleCtx: ctx }),
-    ).toBe(756);
-    expect(
-      getThreadMaxWidth({ viewportWidth: 1800, visibleSide: side, visibleCtx: ctx }),
-    ).toBe(1120);
+    expect(getThreadMaxWidth({ viewportWidth: 1000, visibleSide: side, visibleCtx: ctx })).toBe(
+      580,
+    );
+    expect(getThreadMaxWidth({ viewportWidth: 1400, visibleSide: side, visibleCtx: ctx })).toBe(
+      756,
+    );
+    expect(getThreadMaxWidth({ viewportWidth: 1800, visibleSide: side, visibleCtx: ctx })).toBe(
+      1120,
+    );
   });
 });