feat(web-shell): add git commit history browser

docs/users/features/commands.md

@@ -49,6 +49,7 @@ Commands for adjusting interface appearance and work environment.
 | → `detail`           | Show per-item context usage breakdown                                                                                                                                             | `/context detail`                                                                 |
 | `/history`           | Control history display preferences and visibility                                                                                                                                | `/history collapse-on-resume`, `/history expand-on-resume`, `/history expand-now` |
 | `/diff`              | Open an interactive diff viewer showing uncommitted changes and per-turn diffs. Use ←/→ to switch between current git diff and individual conversation turns, ↑/↓ to browse files | `/diff`                                                                           |
+| `/log`               | Open a commit history viewer for the workspace (Web Shell only)                                                                                                                   | `/log`                                                                            |
 | `/theme`             | Change Qwen Code visual theme                                                                                                                                                     | `/theme`                                                                          |
 | `/vim`               | Turn input area Vim editing mode on/off                                                                                                                                           | `/vim`                                                                            |
 | `/voice`             | Toggle voice dictation input                                                                                                                                                      | `/voice`, `/voice hold`, `/voice tap`, `/voice off`, `/voice status`              |
@@ -310,6 +311,59 @@ In headless (`--prompt`) or non-interactive contexts, `/diff` prints a plain-tex
    +3  -2  README.md
 ```
 
+**Web Shell:** In the Web Shell UI (`qwen serve`), `/diff` opens a graphical diff dialog. A tab bar at the top lets you switch between the **Changes** view and the **History** view (`/log`).
+
+#### History Viewer (`/log`) — Web Shell only
+
+The `/log` command opens a commit history browser for the current workspace. It is available only in the Web Shell UI; the CLI/TUI does not have this command.
+
+**How it works:**
+
+`/log` opens a dialog listing commits in reverse chronological order (newest first). Each row shows:
+
+- Short SHA (monospace, with a copy button for the full SHA)
+- Commit subject (single line)
+- Author name and relative time (e.g. "2h ago")
+- Branch/tag ref labels, when present
+- A merge icon (⎇) for merge commits
+
+Click a commit row to expand its details on demand:
+
+- Full commit message body
+- File change statistics (files changed, lines added/removed, per-file breakdown)
+
+Use **Load more** at the bottom to fetch the next page of commits (50 per page).
+
+**Example:**
+
+```
+┌─ History ──────────────────────────── 50 commits ─ ✕ ┐
+│                                                       │
+│  a1b2c3d  feat(cli): add --json flag        2h ago   │
+│           wenshao                                    │
+│                                                       │
+│  e4f5g6h  fix(core): handle null config     5h ago   │
+│           dev · main  v1.2.0                         │
+│                                                       │
+│ ▼ 789abcd  refactor: simplify parser        1d ago   │
+│   ┌─────────────────────────────────────────────┐    │
+│   │  Broke the monolithic parse() into smaller  │    │
+│   │  functions for readability.                 │    │
+│   │                                             │    │
+│   │  3 files · +45 −12                          │    │
+│   │   +30 −8   src/parser.ts                    │    │
+│   │   +10 −2   src/utils.ts                     │    │
+│   │   +5  −2   test/parser.test.ts              │    │
+│   └─────────────────────────────────────────────┘    │
+│                                                       │
+│              [ Load more ]                            │
+└───────────────────────────────────────────────────────┘
+```
+
+> [!note]
+>
+> `/log` requires a git repository workspace. If the workspace is not a git repository or has no commits, the dialog shows a placeholder message.
+
 ### 1.9 Information, Settings, and Help
 
 Commands for obtaining information and performing system settings.

docs/users/qwen-serve.md

@@ -66,7 +66,7 @@ qwen serve
 
 The default bind is `127.0.0.1:4170`. Bearer auth is **off** on loopback so local development "just works". The daemon registers the current working directory as its primary workspace; use an absolute `--workspace /path/to/dir` to override it, and repeat the flag to register additional isolated runtimes.
 
-**Open the Web Shell UI.** Browse to `http://127.0.0.1:4170/` (or start the daemon with `qwen serve --open` to launch it automatically) for the full browser terminal — chat, diffs, tool calls, and permission prompts. The UI is served at the daemon root on the same origin as the API. The rest of this guide uses raw HTTP so you can script against the API directly.
+**Open the Web Shell UI.** Browse to `http://127.0.0.1:4170/` (or start the daemon with `qwen serve --open` to launch it automatically) for the full browser terminal — chat, diffs, commit history, tool calls, and permission prompts. The UI is served at the daemon root on the same origin as the API. The rest of this guide uses raw HTTP so you can script against the API directly.
 
 ### 2. Sanity-check it