polish(v0.6): redesign Sessions/Projects toggle + hide keybar on home

- Segmented control: replace the two free-standing bordered boxes with a
  single rounded track holding two pill buttons (iOS-style), active segment
  filled Amber; centred via fit-content + margin auto. Panel top-offset 44→68px.
- Hide the bottom key-bar on the home chooser (it only targets an active
  terminal): updateHomeView toggles body.home-open; CSS hides #keybar.

Frontend-only. 415 tests green; both typechecks clean; verified in-browser
(toggle pill renders, keybar hidden on home, reappears when a tab opens).

docs/PROGRESS_LOG.md

@@ -146,6 +146,14 @@
 - **commit**: <hash 或 N/A>
 ======================================================= -->
 
+### 2026-06-30 · v0.6 UI 打磨 — 首页段控重设计 + 选择器隐藏键栏
+
+- **状态**: `[x]` DONE。415 测试全绿 · 双 typecheck 干净 · `build:web` OK · 真浏览器验证通过。
+- **反馈**(用户): ① Sessions/Projects 段控在 UI 上"有点别扭"(原为两个独立描边方块浮在顶部);② 首页(Sessions/Projects 视图)底部那排终端快捷键栏没必要显示。
+- **修复**(纯前端,`public/style.css` + `public/tabs.ts`): ① `.home-seg` 重设计为 **iOS 风分段控件**——一个圆角"轨道"(`surface-2` 底 + 圆角 999px + 内边距)内含两个 pill 按钮,激活项填 Amber;`width:fit-content + margin:auto` 居中;去掉 first/last/only-child 圆角拼接;面板 `inset` 44→68px 适配新高度。② `TabApp.updateHomeView` 在显示首页时给 `document.body` 加 `home-open` 类,CSS `body.home-open #keybar{display:none}` 隐藏键栏;打开 tab(终端激活)即恢复。
+- **验证**: `npx tsc`(双)干净;`npx vitest run` 415/415;真浏览器:Projects 视图段控为圆角分段 pill(Projects 高亮)、键栏隐藏、83 卡片正常;开 tab 后键栏恢复。
+- **commit**: (本次提交)
+
 ### 2026-06-30 · v0.6 UX 修复 — 会话内无法返回 Projects 首页
 
 - **状态**: `[x]` DONE。**415 测试全绿**(+3)· 双 typecheck 干净 · `build:web` OK · 真浏览器验证通过。

public/style.css

@@ -684,7 +684,7 @@ body {
 /* ── Launcher (home session chooser, shown when no tab is open) ──── */
 .launcher {
   position: absolute;
-  inset: 44px 0 0 0; /* top offset reserves space for .home-seg (height ~32px + gap) */
+  inset: 68px 0 0 0; /* top offset reserves space for .home-seg (track pill + margins) */
   overflow-y: auto;
   padding: 22px 18px 40px;
   box-sizing: border-box;
@@ -898,7 +898,7 @@ body {
 /* Panel wrapper (same host as .launcher; toggled via display) */
 .proj-panel {
   position: absolute;
-  inset: 44px 0 0 0; /* top offset reserves space for .home-seg (height ~32px + gap) */
+  inset: 68px 0 0 0; /* top offset reserves space for .home-seg (track pill + margins) */
   overflow-y: auto;
   padding: 22px 18px 40px;
   box-sizing: border-box;
@@ -1118,46 +1118,49 @@ body {
 /* ── Home segmented control (P6 builds the DOM; styles defined here per spec) */
 
 /* Horizontal pill container, centered above the home grid */
+/* Segmented control: a single rounded "track" holding two pill buttons, with
+ * the active one filled (iOS-style). Centred with fit-content + margin auto. */
 .home-seg {
+  width: fit-content;
+  margin: 14px auto 18px;
   display: flex;
-  justify-content: center;
+  gap: 3px;
-  margin-bottom: 20px;
+  padding: 3px;
+  background: var(--surface-2);
+  border: 1px solid var(--border);
+  border-radius: 999px;
 }
 
 /* Inactive segment */
 .home-seg-btn {
-  background: var(--surface-2);
+  background: transparent;
-  border: 1px solid var(--border-strong);
+  border: none;
   color: var(--text-dim);
   cursor: pointer;
   font: inherit;
   font-size: 13px;
-  padding: 8px 20px;
+  font-weight: 500;
+  padding: 6px 22px;
+  border-radius: 999px;
   transition: background 0.12s ease, color 0.12s ease;
 }
-.home-seg-btn:first-child {
-  border-radius: 20px 0 0 20px;
-}
-.home-seg-btn:last-child {
-  border-radius: 0 20px 20px 0;
-  border-left: none;
-}
-.home-seg-btn:only-child {
-  border-radius: 20px;
-}
 .home-seg-btn:not(.active):hover {
-  background: var(--surface-3);
   color: var(--text);
+  background: var(--surface-3);
 }
 
 /* Active segment — Amber accent; text uses --on-accent for contrast */
 .home-seg-btn.active {
   background: var(--accent);
   color: var(--on-accent);
-  border-color: var(--accent);
   font-weight: 600;
 }
 .home-seg-btn.active:hover {
   background: var(--accent-2);
-  border-color: var(--accent-2);
+}
+
+/* On the home chooser (Sessions/Projects), there is no active terminal, so the
+ * bottom key-bar is just noise — hide it. Toggled by TabApp.updateHomeView(). */
+body.home-open #keybar {
+  display: none;
 }

public/tabs.ts

@@ -122,6 +122,10 @@ export class TabApp {
     // The ⌂ button is "pressed" only while overlaying home on top of open tabs.
     this.homeBtn?.classList.toggle('active', this.homeForced && this.tabs.length > 0)
 
+    // Hide the bottom key-bar on the home chooser — it only sends keys to an
+    // active terminal, so it's noise on the Sessions/Projects views.
+    document.body.classList.toggle('home-open', showHome)
+
     if (showHome) {
       // Overlay home: hide every terminal pane so the chooser is on top.
       for (const t of this.tabs) t.session.hide()