feat: git log as panel in the panel

src/main/engine/GitEngine.ts

@@ -780,6 +780,19 @@ export class GitEngine {
       });
   }
 
+  async getFileHistory(projectPath: string, filePath: string, limit = 50): Promise<GitHistoryEntry[]> {
+    const git = simpleGit(projectPath);
+    const history = await git.log(['--max-count', String(limit), '--', filePath]);
+
+    return history.all.map((entry) => ({
+      hash: entry.hash,
+      shortHash: entry.hash.slice(0, 7),
+      date: entry.date,
+      subject: entry.message,
+      author: entry.author_name,
+    }));
+  }
+
   async getRemoteState(projectPath: string): Promise<GitRemoteStateDto> {
     const git = simpleGit(projectPath);
     const status = await git.status();

src/main/ipc/handlers.ts

@@ -124,6 +124,11 @@ export function registerIpcHandlers(): void {
     return engine.getHistory(projectPath, limit);
   });
 
+  safeHandle('git:fileHistory', async (_, projectPath: string, filePath: string, limit?: number) => {
+    const engine = getGitEngine();
+    return engine.getFileHistory(projectPath, filePath, limit);
+  });
+
   safeHandle('git:remoteState', async (_, projectPath: string) => {
     const engine = getGitEngine();
     return engine.getRemoteState(projectPath);

src/main/preload.ts

@@ -14,6 +14,7 @@ export const electronAPI: ElectronAPI = {
     getDiffContent: (projectPath: string, filePath: string) => ipcRenderer.invoke('git:diffContent', projectPath, filePath),
     getCommitDiffContent: (projectPath: string, commitHash: string) => ipcRenderer.invoke('git:commitDiffContent', projectPath, commitHash),
     getHistory: (projectPath: string, limit?: number) => ipcRenderer.invoke('git:history', projectPath, limit),
+    getFileHistory: (projectPath: string, filePath: string, limit?: number) => ipcRenderer.invoke('git:fileHistory', projectPath, filePath, limit),
     getRemoteState: (projectPath: string) => ipcRenderer.invoke('git:remoteState', projectPath),
     fetch: (projectPath: string) => ipcRenderer.invoke('git:fetch', projectPath),
     pull: (projectPath: string) => ipcRenderer.invoke('git:pull', projectPath),

src/main/shared/electronApi.ts

@@ -405,6 +405,7 @@ export interface ElectronAPI {
     getDiffContent: (projectPath: string, filePath: string) => Promise<GitDiffContentDto>;
     getCommitDiffContent: (projectPath: string, commitHash: string) => Promise<GitCommitDiffContentDto>;
     getHistory: (projectPath: string, limit?: number) => Promise<GitHistoryEntry[]>;
+    getFileHistory: (projectPath: string, filePath: string, limit?: number) => Promise<GitHistoryEntry[]>;
     getRemoteState: (projectPath: string) => Promise<GitRemoteStateDto>;
     fetch: (projectPath: string) => Promise<GitActionResult>;
     pull: (projectPath: string) => Promise<GitActionResult>;

src/renderer/components/Panel/Panel.css

@@ -22,6 +22,8 @@
 }
 
 .panel-tab {
+  background: transparent;
+  border: none;
   padding: 6px 12px;
   font-size: 12px;
   color: var(--vscode-tab-inactiveForeground);
@@ -29,6 +31,11 @@
   border-bottom: 2px solid transparent;
 }
 
+.panel-tab[aria-disabled='true'] {
+  opacity: 0.5;
+  cursor: not-allowed;
+}
+
 .panel-tab:hover {
   color: var(--vscode-tab-activeForeground);
 }
@@ -150,6 +157,43 @@
   background-color: var(--vscode-button-secondaryBackground);
 }
 
+.git-log-list {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+}
+
+.git-log-target {
+  font-size: 12px;
+  color: var(--vscode-descriptionForeground);
+  padding: 0 2px 4px;
+  border-bottom: 1px solid var(--vscode-panel-border);
+}
+
+.git-log-item {
+  background-color: var(--vscode-sideBar-background);
+  border-radius: 4px;
+  padding: 8px;
+}
+
+.git-log-subject {
+  font-size: 12px;
+  color: var(--vscode-editor-foreground);
+  margin-bottom: 4px;
+}
+
+.git-log-meta {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 10px;
+  font-size: 11px;
+  color: var(--vscode-descriptionForeground);
+}
+
+.git-log-hash {
+  font-family: var(--vscode-editor-font-family);
+}
+
 @keyframes spin {
   to { transform: rotate(360deg); }
 }

src/renderer/components/Panel/Panel.tsx

@@ -1,23 +1,187 @@
-import React from 'react';
+import React, { useEffect, useMemo, useRef, useState } from 'react';
 import { useAppStore } from '../../store';
 import './Panel.css';
 
+type PanelTab = 'tasks' | 'output' | 'git-log';
+
+function getPostRelativePath(createdAt: string, slug: string): string | null {
+  const createdDate = new Date(createdAt);
+  if (Number.isNaN(createdDate.getTime())) {
+    return null;
+  }
+
+  const year = String(createdDate.getFullYear());
+  const month = String(createdDate.getMonth() + 1).padStart(2, '0');
+  return `posts/${year}/${month}/${slug}.md`;
+}
+
+function normalizePath(value: string): string {
+  return value.replace(/\\/g, '/').replace(/\/+$/, '');
+}
+
+function toRelativePath(absolutePath: string, projectPath: string): string {
+  const normalizedAbsolute = normalizePath(absolutePath);
+  const normalizedProject = normalizePath(projectPath);
+
+  if (normalizedAbsolute.toLowerCase() === normalizedProject.toLowerCase()) {
+    return '';
+  }
+
+  const prefix = `${normalizedProject}/`;
+  if (normalizedAbsolute.toLowerCase().startsWith(prefix.toLowerCase())) {
+    return normalizedAbsolute.slice(prefix.length);
+  }
+
+  return normalizedAbsolute;
+}
+
 export const Panel: React.FC = () => {
-  const { panelVisible, tasks } = useAppStore();
+  const { panelVisible, tasks, tabs, activeTabId, posts, media, activeProject } = useAppStore();
+  const [activePanelTab, setActivePanelTab] = useState<PanelTab>('tasks');
+  const [gitLogLoading, setGitLogLoading] = useState(false);
+  const [gitLogError, setGitLogError] = useState<string | null>(null);
+  const [gitLogTargetLabel, setGitLogTargetLabel] = useState<string | null>(null);
+  const [gitLogEntries, setGitLogEntries] = useState<Array<{
+    hash: string;
+    shortHash: string;
+    date: string;
+    subject: string;
+    author: string;
+  }>>([]);
+  const requestIdRef = useRef(0);
+
+  const recentTasks = tasks.slice(-10).reverse();
+  const activeEditorTab = useMemo(() => tabs.find((tab) => tab.id === activeTabId) ?? null, [tabs, activeTabId]);
+  const canActivateGitLog = activeEditorTab?.type === 'post' || activeEditorTab?.type === 'media';
+
+  useEffect(() => {
+    if (!canActivateGitLog && activePanelTab === 'git-log') {
+      setActivePanelTab('tasks');
+    }
+  }, [canActivateGitLog, activePanelTab]);
+
+  useEffect(() => {
+    const projectPath = activeProject?.dataPath;
+    if (!projectPath || !activeEditorTab || (activeEditorTab.type !== 'post' && activeEditorTab.type !== 'media')) {
+      setGitLogEntries([]);
+      setGitLogTargetLabel(null);
+      setGitLogError(null);
+      setGitLogLoading(false);
+      return;
+    }
+
+    const currentRequestId = ++requestIdRef.current;
+
+    const loadFileHistory = async () => {
+      setGitLogLoading(true);
+      setGitLogError(null);
+
+      try {
+        let targetLabel = '';
+        let relativeFilePath = '';
+
+        if (activeEditorTab.type === 'post') {
+          const post = posts.find((item) => item.id === activeEditorTab.id) || await window.electronAPI?.posts.get(activeEditorTab.id);
+          if (!post) {
+            setGitLogEntries([]);
+            setGitLogTargetLabel(null);
+            setGitLogLoading(false);
+            return;
+          }
+
+          targetLabel = post.title || post.slug;
+          relativeFilePath = getPostRelativePath(post.createdAt, post.slug) || '';
+        } else {
+          const mediaItem = media.find((item) => item.id === activeEditorTab.id) || await window.electronAPI?.media.get(activeEditorTab.id);
+          if (!mediaItem) {
+            setGitLogEntries([]);
+            setGitLogTargetLabel(null);
+            setGitLogLoading(false);
+            return;
+          }
+
+          targetLabel = mediaItem.title || mediaItem.originalName;
+          const absoluteMediaPath = await window.electronAPI?.media.getFilePath(activeEditorTab.id);
+          if (!absoluteMediaPath) {
+            setGitLogEntries([]);
+            setGitLogTargetLabel(targetLabel);
+            setGitLogLoading(false);
+            return;
+          }
+
+          relativeFilePath = toRelativePath(absoluteMediaPath, projectPath);
+        }
+
+        if (!relativeFilePath) {
+          setGitLogEntries([]);
+          setGitLogTargetLabel(targetLabel || null);
+          setGitLogLoading(false);
+          return;
+        }
+
+        const entries = await window.electronAPI?.git.getFileHistory(projectPath, relativeFilePath, 50);
+        if (requestIdRef.current !== currentRequestId) {
+          return;
+        }
+
+        setGitLogEntries(entries || []);
+        setGitLogTargetLabel(targetLabel || relativeFilePath);
+      } catch (error) {
+        if (requestIdRef.current !== currentRequestId) {
+          return;
+        }
+        setGitLogError(error instanceof Error ? error.message : 'Failed to load git log.');
+        setGitLogEntries([]);
+      } finally {
+        if (requestIdRef.current === currentRequestId) {
+          setGitLogLoading(false);
+        }
+      }
+    };
+
+    void loadFileHistory();
+  }, [activeEditorTab, activeProject?.dataPath, posts, media]);
 
   if (!panelVisible) {
     return null;
   }
 
-  const recentTasks = tasks.slice(-10).reverse();
-
   return (
     <div className="panel">
       <div className="panel-header">
-        <div className="panel-tabs">
+        <div className="panel-tabs" role="tablist" aria-label="Panel tabs">
-          <div className="panel-tab active">Tasks</div>
+          <button
-          <div className="panel-tab">Output</div>
+            type="button"
-          <div className="panel-tab">Sync Log</div>
+            role="tab"
+            className={`panel-tab ${activePanelTab === 'tasks' ? 'active' : ''}`}
+            aria-selected={activePanelTab === 'tasks'}
+            onClick={() => setActivePanelTab('tasks')}
+          >
+            Tasks
+          </button>
+          <button
+            type="button"
+            role="tab"
+            className={`panel-tab ${activePanelTab === 'output' ? 'active' : ''}`}
+            aria-selected={activePanelTab === 'output'}
+            onClick={() => setActivePanelTab('output')}
+          >
+            Output
+          </button>
+          <button
+            type="button"
+            role="tab"
+            className={`panel-tab ${activePanelTab === 'git-log' ? 'active' : ''}`}
+            aria-selected={activePanelTab === 'git-log'}
+            aria-disabled={!canActivateGitLog}
+            onClick={() => {
+              if (canActivateGitLog) {
+                setActivePanelTab('git-log');
+              }
+            }}
+          >
+            Git Log
+          </button>
         </div>
         <button 
           className="panel-close"
@@ -28,7 +192,8 @@ export const Panel: React.FC = () => {
         </button>
       </div>
       <div className="panel-content">
-        {recentTasks.length === 0 ? (
+        {activePanelTab === 'tasks' && (
+          recentTasks.length === 0 ? (
             <div className="panel-empty">No recent tasks</div>
           ) : (
             <div className="task-list">
@@ -62,6 +227,37 @@ export const Panel: React.FC = () => {
                 </div>
               ))}
             </div>
+          )
+        )}
+
+        {activePanelTab === 'output' && (
+          <div className="panel-empty">No output</div>
+        )}
+
+        {activePanelTab === 'git-log' && (
+          !canActivateGitLog ? (
+            <div className="panel-empty">Open a post or media editor to view git log</div>
+          ) : gitLogLoading ? (
+            <div className="panel-empty">Loading git log...</div>
+          ) : gitLogError ? (
+            <div className="panel-empty">{gitLogError}</div>
+          ) : gitLogEntries.length === 0 ? (
+            <div className="panel-empty">No commits found for this item</div>
+          ) : (
+            <div className="git-log-list">
+              <div className="git-log-target">{gitLogTargetLabel}</div>
+              {gitLogEntries.map((entry) => (
+                <div key={entry.hash} className="git-log-item">
+                  <div className="git-log-subject">{entry.subject}</div>
+                  <div className="git-log-meta">
+                    <span className="git-log-hash">{entry.shortHash}</span>
+                    <span>{entry.author}</span>
+                    <span>{new Date(entry.date).toLocaleString()}</span>
+                  </div>
+                </div>
+              ))}
+            </div>
+          )
         )}
       </div>
     </div>

tests/engine/GitEngine.test.ts

@@ -348,6 +348,47 @@ describe('GitEngine', () => {
     });
   });
 
+  describe('getFileHistory', () => {
+    it('should return commits for a specific file path', async () => {
+      mockLog.mockResolvedValue({
+        all: [
+          {
+            hash: 'abc123def456',
+            date: '2026-02-16T10:00:00.000Z',
+            message: 'docs: update first post',
+            author_name: 'Dev One',
+          },
+          {
+            hash: '789fed654321',
+            date: '2026-02-15T09:00:00.000Z',
+            message: 'feat: add frontmatter field',
+            author_name: 'Dev Two',
+          },
+        ],
+      });
+
+      const result = await gitEngine.getFileHistory('/tmp/project', 'posts/2026/02/first-post.md', 50);
+
+      expect(mockLog).toHaveBeenCalledWith(['--max-count', '50', '--', 'posts/2026/02/first-post.md']);
+      expect(result).toEqual([
+        {
+          hash: 'abc123def456',
+          shortHash: 'abc123d',
+          date: '2026-02-16T10:00:00.000Z',
+          subject: 'docs: update first post',
+          author: 'Dev One',
+        },
+        {
+          hash: '789fed654321',
+          shortHash: '789fed6',
+          date: '2026-02-15T09:00:00.000Z',
+          subject: 'feat: add frontmatter field',
+          author: 'Dev Two',
+        },
+      ]);
+    });
+  });
+
   describe('getRemoteState', () => {
     it('should return upstream tracking and ahead/behind counts when tracking branch exists', async () => {
       mockStatus.mockResolvedValue({
@@ -602,6 +643,15 @@ describe('GitEngine', () => {
   });
 
   describe('pruneLfsCache', () => {
+    beforeEach(() => {
+      vi.useFakeTimers();
+      vi.setSystemTime(new Date('2026-02-16T12:00:00.000Z'));
+    });
+
+    afterEach(() => {
+      vi.useRealTimers();
+    });
+
     it('should run git lfs prune with verify-remote and aggressive recency defaults', async () => {
       mockLog.mockResolvedValue({
         all: [

tests/renderer/components/Panel.test.tsx

@@ -0,0 +1,136 @@
+import React from 'react';
+import { describe, it, expect, beforeEach, vi, afterEach } from 'vitest';
+import { act, render, screen } from '@testing-library/react';
+import { Panel } from '../../../src/renderer/components/Panel/Panel';
+import { useAppStore } from '../../../src/renderer/store';
+import type { PostData, MediaData } from '../../../src/main/shared/electronApi';
+
+const createPost = (overrides: Partial<PostData> = {}): PostData => ({
+  id: 'post-1',
+  projectId: 'project-1',
+  title: 'First Post',
+  slug: 'first-post',
+  content: 'Hello',
+  status: 'draft',
+  createdAt: '2026-02-01T08:00:00.000Z',
+  updatedAt: '2026-02-01T08:00:00.000Z',
+  tags: [],
+  categories: ['article'],
+  ...overrides,
+});
+
+const createMedia = (overrides: Partial<MediaData> = {}): MediaData => ({
+  id: 'media-1',
+  projectId: 'project-1',
+  filename: 'image-1.jpg',
+  originalName: 'image-1.jpg',
+  mimeType: 'image/jpeg',
+  size: 123,
+  createdAt: '2026-02-01T08:00:00.000Z',
+  updatedAt: '2026-02-01T08:00:00.000Z',
+  tags: [],
+  ...overrides,
+});
+
+describe('Panel', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+
+    (window as any).electronAPI = {
+      ...(window as any).electronAPI,
+      git: {
+        ...(window as any).electronAPI?.git,
+        getFileHistory: vi.fn().mockResolvedValue([]),
+      },
+      media: {
+        ...(window as any).electronAPI?.media,
+        getFilePath: vi.fn().mockResolvedValue('/repo/path/media/2026/02/image-1.jpg'),
+      },
+      posts: {
+        ...(window as any).electronAPI?.posts,
+        get: vi.fn().mockResolvedValue(null),
+      },
+    };
+
+    useAppStore.setState({
+      panelVisible: true,
+      tasks: [],
+      activeProject: {
+        id: 'project-1',
+        name: 'Test Project',
+        slug: 'test-project',
+        isActive: true,
+        dataPath: '/repo/path',
+        createdAt: '2026-02-01T08:00:00.000Z',
+        updatedAt: '2026-02-01T08:00:00.000Z',
+      },
+      posts: [createPost()],
+      media: [createMedia()],
+      tabs: [{ type: 'post', id: 'post-1', isTransient: false }],
+      activeTabId: 'post-1',
+    });
+  });
+
+  afterEach(() => {
+    useAppStore.setState({ panelVisible: false });
+  });
+
+  it('renders a Git Log tab label instead of Sync Log', () => {
+    render(<Panel />);
+
+    expect(screen.getByRole('tab', { name: 'Git Log' })).toBeInTheDocument();
+    expect(screen.queryByText('Sync Log')).not.toBeInTheDocument();
+  });
+
+  it('loads git history for the focused item and updates when active editor changes', async () => {
+    const getFileHistory = vi.fn()
+      .mockResolvedValueOnce([
+        {
+          hash: 'abc123def456',
+          shortHash: 'abc123d',
+          date: '2026-02-16T10:00:00.000Z',
+          subject: 'docs: update first post',
+          author: 'Dev One',
+        },
+      ])
+      .mockResolvedValueOnce([
+        {
+          hash: 'def456abc123',
+          shortHash: 'def456a',
+          date: '2026-02-17T09:00:00.000Z',
+          subject: 'chore: replace media file',
+          author: 'Dev Two',
+        },
+      ]);
+
+    (window as any).electronAPI.git.getFileHistory = getFileHistory;
+
+    render(<Panel />);
+
+    await vi.waitFor(() => {
+      expect(getFileHistory).toHaveBeenCalledWith('/repo/path', 'posts/2026/02/first-post.md', 50);
+    });
+
+    act(() => {
+      useAppStore.setState({
+        tabs: [{ type: 'media', id: 'media-1', isTransient: false }],
+        activeTabId: 'media-1',
+      });
+    });
+
+    await vi.waitFor(() => {
+      expect(getFileHistory).toHaveBeenCalledWith('/repo/path', 'media/2026/02/image-1.jpg', 50);
+    });
+  });
+
+  it('disables Git Log tab when focused tab is not a post or media editor', () => {
+    useAppStore.setState({
+      tabs: [{ type: 'settings', id: 'settings', isTransient: false }],
+      activeTabId: 'settings',
+    });
+
+    render(<Panel />);
+
+    expect(screen.getByRole('tab', { name: 'Git Log' })).toHaveAttribute('aria-disabled', 'true');
+  });
+});

tests/setup.ts

@@ -51,6 +51,7 @@ Object.defineProperty(globalThis, 'window', {
         getDiff: vi.fn(),
         getDiffContent: vi.fn(),
         getHistory: vi.fn(),
+        getFileHistory: vi.fn(),
         init: vi.fn(),
       },
       posts: {
@@ -83,6 +84,7 @@ Object.defineProperty(globalThis, 'window', {
         regenerateThumbnails: vi.fn(),
         search: vi.fn(),
         getUrl: vi.fn(),
+        getFilePath: vi.fn(),
       },
       sync: {
         configure: vi.fn(),