feat(git): inline file diffs in commit history rows (#1291)

* chore: add .worktrees/ to gitignore for worktree workflow

* feat(git): add getCommitFileDiff service function

* docs(git): document getCommitFileDiff in module docs

* feat(git): add GET /api/git/commit-file-diff route

* feat(git): add CommitFileDiffResponse type and GitAPI method signature

* feat(git): add getCommitFileDiff HTTP client function

* feat(git): add getCommitFileDiff API facade

* feat(git): add getCommitFileDiff stub to VS Code bridge

* feat(git): add getCommitFileDiff to VS Code gitService and bridge handler

* feat(git): add inline file diff to history commit rows

* fix(git): consolidate CommitFileDiffResponse import to gitApi facade

* fix(git): pass directory through history, validate hash, propagate git errors

* fix(git): use exit code check for VS Code getCommitFileDiff error detection

* fix(git): VS Code rename detection, hash validation parity, retry on error

* fix(git): register scroll container as virtualizer root to fix empty space in history diffs

* fix(git): address greptile review — rename key extraction, directory guard, language detection, isBinary cleanup

* fix(git): harden history inline diffs

---------

Co-authored-by: Bohdan Triapitsyn <artmore@protonmail.com>

packages/ui/src/lib/api/types.ts

@@ -303,6 +303,12 @@ export interface GitCommitFilesResponse {
   files: CommitFileEntry[];
 }
 
+export interface CommitFileDiffResponse {
+  original: string;
+  modified: string;
+  isBinary: boolean;
+}
+
 export interface GitWorktreeInfo {
   head: string;
   name: string;
@@ -447,6 +453,7 @@ export interface GitAPI {
   renameBranch(directory: string, oldName: string, newName: string): Promise<{ success: boolean; branch: string }>;
   getGitLog(directory: string, options?: GitLogOptions): Promise<GitLogResponse>;
   getCommitFiles(directory: string, hash: string): Promise<GitCommitFilesResponse>;
+  getCommitFileDiff?(directory: string, hash: string, filePath: string, isBinary: boolean): Promise<CommitFileDiffResponse>;
   getCurrentGitIdentity(directory: string): Promise<GitIdentitySummary | null>;
   hasLocalIdentity?(directory: string): Promise<boolean>;
   setGitIdentity(directory: string, profileId: string): Promise<{ success: boolean; profile: GitIdentityProfile }>;