✨ feat(vscode): 代码阅读侧栏加「未提交的更改」筛选

- 标题栏新按钮「未提交的更改」：树里只剩工作区各 git 仓库里没提交的文件（暂存、没暂存、未跟踪、合并冲突），每个有改动的仓库一个根，跟着 git 状态自动重摆；上色和徽标交给 VS Code 自带的 git 装饰
- 两种筛选互斥，由 TreeFilters 统一管，上下文键合并成 superpowers.codeReader.filter（review / uncommitted）
- 改动文件树改成多根，buildChangedTree 挪到 explorer/changedTree 并改吃 {path, change}
- 内置 git 扩展 API 的类型和加载抽到 src/git/gitApi、gitExtension，提交按钮的监听也改用它
- 文件注释按文件所在的工作区文件夹记，不看树从哪个根摆下来

vscode/src/codeReader/review/changedFiles.test.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it } from 'vitest'
-import { buildChangedTree, CHANGE_STYLES, changeOf } from './changedFiles'
+import { CHANGE_STYLES, changeOf } from './changedFiles'
 
 describe('改动状态', () => {
   it('新增 A、删除 D，别的（改名、复制、改了、没改）都算修改 M', () => {
@@ -16,65 +16,3 @@ describe('改动状态', () => {
     expect(CHANGE_STYLES.D.tooltip).toBe('PR 里删掉了')
   })
 })
-
-describe('改动的文件树', () => {
-  // 原型「审查 · 改动的文件」里的 6 个文件，外加一个改名的
-  const files = [
-    { path: 'backend/src/luffy_agent/user/routes.py', status: 'changed' },
-    { path: 'backend/tests/user/test_avatar.py', status: 'added' },
-    { path: 'backend/src/luffy_agent/core/storage.py', status: 'changed' },
-    { path: 'backend/src/luffy_agent/user/legacy_profile.py', status: 'deleted' },
-    { path: 'backend/src/luffy_agent/user/services.py', status: 'changed' },
-    { path: 'backend/src/luffy_agent/user/schemas.py', status: 'renamed' },
-  ]
-  const tree = buildChangedTree(files)
-  const names = (dir: string): string[] => (tree.get(dir) ?? []).map(entry => entry.name)
-
-  it('目录层级照留，每层只有通往改过的文件的目录', () => {
-    expect(names('')).toEqual(['backend'])
-    expect(names('backend')).toEqual(['src', 'tests'])
-    expect(names('backend/src')).toEqual(['luffy_agent'])
-    expect(names('backend/src/luffy_agent')).toEqual(['core', 'user'])
-    expect(names('backend/src/luffy_agent/core')).toEqual(['storage.py'])
-    expect(names('backend/tests/user')).toEqual(['test_avatar.py'])
-  })
-
-  it('同一层里的文件按名字排，带着各自的改动和相对仓库根的路径', () => {
-    expect(tree.get('backend/src/luffy_agent/user')).toEqual([
-      { name: 'legacy_profile.py', path: 'backend/src/luffy_agent/user/legacy_profile.py', isDirectory: false, change: 'D' },
-      { name: 'routes.py', path: 'backend/src/luffy_agent/user/routes.py', isDirectory: false, change: 'M' },
-      { name: 'schemas.py', path: 'backend/src/luffy_agent/user/schemas.py', isDirectory: false, change: 'M' },
-      { name: 'services.py', path: 'backend/src/luffy_agent/user/services.py', isDirectory: false, change: 'M' },
-    ])
-  })
-
-  it('目录没有改动，路径相对仓库根', () => {
-    expect(tree.get('backend')).toEqual([
-      { name: 'src', path: 'backend/src', isDirectory: true },
-      { name: 'tests', path: 'backend/tests', isDirectory: true },
-    ])
-  })
-
-  it('目录在前、文件在后，名字不区分大小写，和普通的树一样', () => {
-    const mixed = buildChangedTree([
-      { path: 'README.md', status: 'changed' },
-      { path: 'src/a.ts', status: 'added' },
-      { path: 'Docs/b.md', status: 'added' },
-      { path: 'package.json', status: 'changed' },
-    ])
-    expect(mixed.get('')?.map(entry => entry.name)).toEqual(['Docs', 'src', 'package.json', 'README.md'])
-  })
-
-  it('文件换成同名目录（删掉 a、新加 a/b）两项都留着', () => {
-    const replaced = buildChangedTree([{ path: 'a', status: 'deleted' }, { path: 'a/b', status: 'added' }])
-    expect(replaced.get('')).toEqual([
-      { name: 'a', path: 'a', isDirectory: true },
-      { name: 'a', path: 'a', isDirectory: false, change: 'D' },
-    ])
-    expect(replaced.get('a')?.map(entry => entry.change)).toEqual(['A'])
-  })
-
-  it('没有改动的文件时根下面是空的', () => {
-    expect(buildChangedTree([]).get('')).toEqual([])
-  })
-})