fix: 回应独立 CR 的 P2/P3 意见（0×P1）

- P2-1 onOpen 收到真正落地的 tab：url 新建场景从 landed 态按 id 反查
  （补丁后对象），回调不再拿到未打 url 的 tab
- P2-2 插件设置行显式取值源：FeatureSettingsRows 新增 valueSource prop，
  插件行读自己的 pluginSettings blob——插件键与宿主 pref 同名时不再
  静默读宿主值（原投影合并有读宿主写插件的读写不对称）；prop 命名避开
  Object.prototype.valueOf 冲突
- P2-3 consumer 类型检查接入工程：package.json 新增 check:consumer-types
  脚本 + CI 在 build 后执行；脚本补 lib/types 存在性前置检查（防假绿）
- P3-1 url seed 只在新建时应用：dedupe 聚焦的 tab 不再被覆写 path
- P3-2 closeTab/activateTab 未知 id 严格 no-op：store.reduce 对同引用
  结果短路（不 notify、不重写 localStorage），根因修复 + 回归测试
- P3-3 closeTab/activateTab 增加可选 scope（cwd 随回调传递），Sidebar
  双树激活/关闭路径传入 { sessionId, cwd }
- P3-4 定向打开不再自动展开不可见 session 的面板
- P3-5 Sidebar 终端 pty 释放查找覆盖双树（底部面板终端不再漏掉 HTTP
  兜底）
- P3-6/P3-7 与 Nits：AGENTS.md/指南文档化（dedupeKey 纯函数、meta 用
  null 清除、回调 scope 的 cwd 语义）；consumer fixture 补常量导出覆盖

测试 +6（url 落地保真 / url 不覆写聚焦 / 未知 id 无 notify / 定向打开
不展开 / scope 随回调 / valueSource 键隔离），464 全绿；typecheck、
build、consumer 校验全部通过。

tests/service.spec.ts

@@ -897,3 +897,89 @@ describe('lifecycle classification vs dedupe (codex review fixes)', () => {
     expect(events).toEqual(['open', 'activate'])
   })
 })
+
+describe('independent CR follow-up fixes', () => {
+  it('onOpen for a url-created tab receives the LANDED tab (path = url)', () => {
+    const store = createSidebarStore()
+    const service = createBetterSidebarService(store)
+    let seenPath: string | undefined
+    service.registerTab({
+      id: 'web',
+      title: 'Web',
+      onOpen: (tab) => { seenPath = tab.path },
+      component: () => null,
+    })
+    store.setSession('s1')
+    service.openTab({ type: 'web', title: 'example.com', url: 'https://example.com/x' })
+    expect(seenPath).toBe('https://example.com/x')
+  })
+
+  it('a url seed NEVER overwrites the path of a dedupe-focused tab', () => {
+    const store = createSidebarStore()
+    const service = createBetterSidebarService(store)
+    service.registerTab({
+      id: 'web',
+      title: 'Web',
+      dedupeKey: () => 'web',
+      component: () => null,
+    })
+    store.setSession('s1')
+    service.openTab({ type: 'web', title: 'first', url: 'https://a.example' })
+    service.openTab({ type: 'web', title: 'second', url: 'https://b.example' })
+    const tabs = allLeaves(store.getSnapshot().state!.splits).flatMap(l => l.tabs).filter(t => t.type === 'web')
+    expect(tabs).toHaveLength(1)
+    // The focused tab keeps its ORIGINAL url — the second open must not
+    // repoint it.
+    expect(tabs[0]!.path).toBe('https://a.example')
+  })
+
+  it('closing / activating an unknown tab id is a strict no-op (no notify)', () => {
+    const store = createSidebarStore()
+    const service = createBetterSidebarService(store)
+    service.registerTab({ id: 'x', title: 'X', component: () => null })
+    store.setSession('s1')
+    let calls = 0
+    store.subscribe(() => { calls++ })
+    service.closeTab('does-not-exist')
+    service.activateTab('does-not-exist')
+    expect(calls).toBe(0)
+  })
+
+  it('a targeted open into an INACTIVE session never auto-expands its panels', () => {
+    const store = createSidebarStore()
+    const service = createBetterSidebarService(store)
+    service.registerTab({ id: 'editor', title: 'Editor', component: () => null })
+    store.setSession('s1')
+    // The target session starts collapsed.
+    store.reduceFor('s2', s => ({ ...s, panelOpen: false, bottomOpen: false }))
+    service.openTab({ type: 'editor', title: 'main.ts', path: '/p/main.ts' }, { sessionId: 's2' })
+    // Nothing is in sight for the user — the open must not expand s2.
+    store.setSession('s2')
+    expect(store.getSnapshot().state?.panelOpen).toBe(false)
+    expect(store.getSnapshot().state?.bottomOpen).toBe(false)
+    expect(allLeaves(store.getSnapshot().state!.splits).flatMap(l => l.tabs).some(t => t.type === 'editor')).toBe(true)
+  })
+
+  it('closeTab/activateTab accept an optional scope that rides to the callback', () => {
+    const store = createSidebarStore()
+    const service = createBetterSidebarService(store)
+    const seen: Array<{ kind: string; cwd?: string }> = []
+    service.registerTab({
+      id: 'life',
+      title: 'Life',
+      single: true,
+      onActivate: (_tab, scope) => { seen.push({ kind: 'activate', cwd: scope.cwd }) },
+      onClose: (_tab, scope) => { seen.push({ kind: 'close', cwd: scope.cwd }) },
+      component: () => null,
+    })
+    store.setSession('s1')
+    service.openTab({ type: 'life', title: 'Life' })
+    const tab = allLeaves(store.getSnapshot().state!.splits).flatMap(l => l.tabs).find(t => t.type === 'life')!
+    service.activateTab(tab.id, { sessionId: 's1', cwd: '/work' })
+    service.closeTab(tab.id, { sessionId: 's1', cwd: '/work' })
+    expect(seen).toEqual([
+      { kind: 'activate', cwd: '/work' },
+      { kind: 'close', cwd: '/work' },
+    ])
+  })
+})