✨ feat(vscode): 「改动」tab 重做为整 PR 聚合的主从式内联 diff（git-diff-view）

- 左树右 diff：左栏全 PR 文件树 + 统计条（共改 N · +X−Y · 已查看 M/N），右栏选中单文件内联 diff
- 用 @git-diff-view/react 只渲染当前选中文件，绕开上万行全量渲染的性能坑
- gitea 新增 listPullRequestFiles、getPullRequest 取 merge_base/head，按需回两版原文
- diff 走 merge_base→head 三点口径（与 Gitea 网页一致），getRawFile 404 兜底成全增/全删/改名
- 已查看态按 head sha 落盘、新 push 自然重置；去掉提交列表、原生 diff 与 spx-gitea 虚拟文档 provider

vscode/src/gitea/api.ts

@@ -216,6 +216,12 @@ export interface GiteaPullRequest {
    * the underlying issue number (`Closes #N`) when a comment fires on a PR.
    */
   body: string
+  /** head 分支最新提交 sha：PR diff 的右侧 ref。 */
+  headSha: string
+  /** base 分支 sha：mergeBase 取不到时的左侧 ref 兜底。 */
+  baseSha: string
+  /** base 与 head 的合并基：PR diff 的左侧 ref（三点 diff，与 Gitea 网页口径一致）。 */
+  mergeBase: string
 }
 
 /**
@@ -242,6 +248,9 @@ export async function getPullRequest(opts: {
     merged_at?: unknown
     html_url?: unknown
     body?: unknown
+    head?: { sha?: unknown }
+    base?: { sha?: unknown }
+    merge_base?: unknown
   }
   return {
     number: typeof data.number === 'number' ? data.number : Number(data.number),
@@ -250,6 +259,9 @@ export async function getPullRequest(opts: {
     merged_at: typeof data.merged_at === 'string' ? data.merged_at : null,
     html_url: typeof data.html_url === 'string' ? data.html_url : '',
     body: typeof data.body === 'string' ? data.body : '',
+    headSha: typeof data.head?.sha === 'string' ? data.head.sha : '',
+    baseSha: typeof data.base?.sha === 'string' ? data.base.sha : '',
+    mergeBase: typeof data.merge_base === 'string' ? data.merge_base : '',
   }
 }
 
@@ -513,113 +525,64 @@ export async function deleteWebhook(opts: {
   })
 }
 
-/** PR 提交的精简视图：列表渲染只需 sha / 首行消息 / 作者 / 时间。 */
-export interface PrCommitDto {
-  sha: string
-  message: string
-  authorName: string
-  date: string
-}
-
-/** 单个提交内的一个文件改动：path 给 diff 用，status 决定徽标颜色。 */
-export interface GitCommitFileDto {
+/** PR 改动里的一个文件：path/status 给文件树，additions/deletions 求和成统计条，previousFilename 用于改名时取左侧旧路径。 */
+export interface PrFileDto {
   path: string
   status: string
-}
-
-/** 一个提交的详情：parentSha 用作 diff 左侧 ref，files 是改动清单。 */
-export interface GitCommitDetailDto {
-  sha: string
-  parentSha: string | undefined
-  files: GitCommitFileDto[]
+  additions: number
+  deletions: number
+  previousFilename?: string
 }
 
 /**
- * 列出某 PR 的提交。关掉 files/stat/verification 让响应尽量小，列表只用到
- * 顶层字段。message 取首行（完整消息留给 commit 详情页，这里只做概览）。
+ * 列出某 PR 的全部改动文件（三点 diff，merge_base → head，与 Gitea 网页 diff 口径一致）。
+ * 分页拉到短页为止；改名文件带 previousFilename（旧路径，取左侧内容用）。
  */
-export async function listPullRequestCommits(opts: {
+export async function listPullRequestFiles(opts: {
   host: string
   token: string
   owner: string
   repo: string
   index: number
-  limit?: number
-}): Promise<PrCommitDto[]> {
-  const url = new URL(
-    `${baseUrl(opts.host)}/repos/${opts.owner}/${opts.repo}/pulls/${opts.index}/commits`,
-  )
-  url.searchParams.set('page', '1')
-  url.searchParams.set('limit', String(opts.limit ?? 50))
-  url.searchParams.set('files', 'false')
-  url.searchParams.set('stat', 'false')
-  url.searchParams.set('verification', 'false')
+}): Promise<PrFileDto[]> {
+  const out: PrFileDto[] = []
+  let page = 1
+  // eslint-disable-next-line no-constant-condition
+  while (true) {
+    const url = new URL(
+      `${baseUrl(opts.host)}/repos/${opts.owner}/${opts.repo}/pulls/${opts.index}/files`,
+    )
+    url.searchParams.set('limit', String(PAGE_SIZE))
+    url.searchParams.set('page', String(page))
 
-  const res = await fetch(url.toString(), { headers: authHeaders(opts.token) })
-  await ensureOk(res)
-  const data = await res.json() as Array<{
-    sha?: unknown
-    created?: unknown
-    commit?: { message?: unknown, author?: { name?: unknown, date?: unknown } }
-    author?: { login?: unknown } | null
-  }>
-  if (!Array.isArray(data))
-    return []
-  const result = data.map((c) => {
-    const fullMessage = typeof c.commit?.message === 'string' ? c.commit.message : ''
-    const message = fullMessage.split('\n', 1)[0] ?? ''
-    const authorName = typeof c.commit?.author?.name === 'string' ? c.commit.author.name : ''
-    const commitDate = typeof c.commit?.author?.date === 'string' ? c.commit.author.date : ''
-    const created = typeof c.created === 'string' ? c.created : ''
-    return {
-      sha: typeof c.sha === 'string' ? c.sha : '',
-      message,
-      authorName,
-      date: commitDate || created,
-    }
-  })
-  // 按提交时间升序（最早在最前）。ISO 字符串字典序即时间序；date 为空者排前面。
-  result.sort((a, b) => a.date.localeCompare(b.date))
-  return result
-}
-
-/**
- * 取单个提交详情，带文件清单。parentSha（首个父提交）作为 diff 左侧 ref；
- * 根提交无 parent 时为 undefined，调用方据此把左侧当空内容处理（呈现全新增）。
- */
-export async function getGitCommit(opts: {
-  host: string
-  token: string
-  owner: string
-  repo: string
-  sha: string
-}): Promise<GitCommitDetailDto> {
-  const url = new URL(
-    `${baseUrl(opts.host)}/repos/${opts.owner}/${opts.repo}/git/commits/${opts.sha}`,
-  )
-  url.searchParams.set('files', 'true')
-  url.searchParams.set('stat', 'false')
-  url.searchParams.set('verification', 'false')
-
-  const res = await fetch(url.toString(), { headers: authHeaders(opts.token) })
-  await ensureOk(res)
-  const data = await res.json() as {
-    sha?: unknown
-    parents?: Array<{ sha?: unknown }>
-    files?: Array<{ filename?: unknown, status?: unknown }>
-  }
-  const parentSha = typeof data.parents?.[0]?.sha === 'string' ? data.parents[0].sha : undefined
-  const files = Array.isArray(data.files)
-    ? data.files.map(f => ({
+    const res = await fetch(url.toString(), { headers: authHeaders(opts.token) })
+    await ensureOk(res)
+    const batch = await res.json() as Array<{
+      filename?: unknown
+      previous_filename?: unknown
+      status?: unknown
+      additions?: unknown
+      deletions?: unknown
+    }>
+    if (!Array.isArray(batch) || batch.length === 0)
+      break
+    for (const f of batch) {
+      const prev = typeof f.previous_filename === 'string' && f.previous_filename.length > 0
+        ? f.previous_filename
+        : undefined
+      out.push({
         path: typeof f.filename === 'string' ? f.filename : '',
         status: typeof f.status === 'string' ? f.status : '',
-      }))
-    : []
-  return {
-    sha: typeof data.sha === 'string' ? data.sha : opts.sha,
-    parentSha,
-    files,
+        additions: typeof f.additions === 'number' ? f.additions : 0,
+        deletions: typeof f.deletions === 'number' ? f.deletions : 0,
+        previousFilename: prev,
+      })
+    }
+    if (batch.length < PAGE_SIZE)
+      break
+    page += 1
   }
+  return out
 }
 
 /**