Refactor Settings, FileTree, GitPanel, Shell, and CodeEditor components (#402)

src/components/git-panel/view/history/CommitHistoryItem.tsx

@@ -0,0 +1,71 @@
+import { ChevronDown, ChevronRight } from 'lucide-react';
+import DiffViewer from '../../../DiffViewer.jsx';
+import type { GitCommitSummary } from '../../types/types';
+
+type DiffViewerProps = {
+  diff: string;
+  fileName: string;
+  isMobile: boolean;
+  wrapText: boolean;
+};
+
+const DiffViewerComponent = DiffViewer as unknown as (props: DiffViewerProps) => JSX.Element;
+
+type CommitHistoryItemProps = {
+  commit: GitCommitSummary;
+  isExpanded: boolean;
+  diff?: string;
+  isMobile: boolean;
+  wrapText: boolean;
+  onToggle: () => void;
+};
+
+export default function CommitHistoryItem({
+  commit,
+  isExpanded,
+  diff,
+  isMobile,
+  wrapText,
+  onToggle,
+}: CommitHistoryItemProps) {
+  return (
+    <div className="border-b border-border last:border-0">
+      <button
+        type="button"
+        aria-expanded={isExpanded}
+        className="w-full flex items-start p-3 hover:bg-accent/50 cursor-pointer transition-colors text-left bg-transparent border-0"
+        onClick={onToggle}
+      >
+        <span className="mr-2 mt-1 p-0.5 hover:bg-accent rounded">
+          {isExpanded ? <ChevronDown className="w-3 h-3" /> : <ChevronRight className="w-3 h-3" />}
+        </span>
+        <div className="flex-1 min-w-0">
+          <div className="flex items-start justify-between gap-2">
+            <div className="flex-1 min-w-0">
+              <p className="text-sm font-medium text-foreground truncate">{commit.message}</p>
+              <p className="text-sm text-muted-foreground mt-1">
+                {commit.author}
+                {' \u2022 '}
+                {commit.date}
+              </p>
+            </div>
+            <span className="text-sm font-mono text-muted-foreground/60 flex-shrink-0">
+              {commit.hash.substring(0, 7)}
+            </span>
+          </div>
+        </div>
+      </button>
+
+      {isExpanded && diff && (
+        <div className="bg-muted/50">
+          <div className="max-h-96 overflow-y-auto p-2">
+            <div className="text-sm font-mono text-muted-foreground mb-2">
+              {commit.stats}
+            </div>
+            <DiffViewerComponent diff={diff} fileName="commit" isMobile={isMobile} wrapText={wrapText} />
+          </div>
+        </div>
+      )}
+    </div>
+  );
+}

src/components/git-panel/view/history/HistoryView.tsx

@@ -0,0 +1,77 @@
+import { History, RefreshCw } from 'lucide-react';
+import { useCallback, useState } from 'react';
+import type { GitDiffMap, GitCommitSummary } from '../../types/types';
+import CommitHistoryItem from './CommitHistoryItem';
+
+type HistoryViewProps = {
+  isMobile: boolean;
+  isLoading: boolean;
+  recentCommits: GitCommitSummary[];
+  commitDiffs: GitDiffMap;
+  wrapText: boolean;
+  onFetchCommitDiff: (commitHash: string) => Promise<void>;
+};
+
+export default function HistoryView({
+  isMobile,
+  isLoading,
+  recentCommits,
+  commitDiffs,
+  wrapText,
+  onFetchCommitDiff,
+}: HistoryViewProps) {
+  const [expandedCommits, setExpandedCommits] = useState<Set<string>>(new Set());
+
+  const toggleCommitExpanded = useCallback(
+    (commitHash: string) => {
+      const isExpanding = !expandedCommits.has(commitHash);
+
+      setExpandedCommits((previous) => {
+        const next = new Set(previous);
+        if (next.has(commitHash)) {
+          next.delete(commitHash);
+        } else {
+          next.add(commitHash);
+        }
+        return next;
+      });
+
+      // Load commit diff lazily only the first time a commit is expanded.
+      if (isExpanding && !commitDiffs[commitHash]) {
+        onFetchCommitDiff(commitHash).catch((err) => {
+          console.error('Failed to fetch commit diff:', err);
+        });
+      }
+    },
+    [commitDiffs, expandedCommits, onFetchCommitDiff, setExpandedCommits],
+  );
+
+  return (
+    <div className={`flex-1 overflow-y-auto ${isMobile ? 'pb-mobile-nav' : ''}`}>
+      {isLoading ? (
+        <div className="flex items-center justify-center h-32">
+          <RefreshCw className="w-5 h-5 animate-spin text-muted-foreground" />
+        </div>
+      ) : recentCommits.length === 0 ? (
+        <div className="flex flex-col items-center justify-center h-32 text-muted-foreground">
+          <History className="w-10 h-10 mb-2 opacity-40" />
+          <p className="text-sm">No commits found</p>
+        </div>
+      ) : (
+        <div className={isMobile ? 'pb-4' : ''}>
+          {recentCommits.map((commit) => (
+            <CommitHistoryItem
+              key={commit.hash}
+              commit={commit}
+              isExpanded={expandedCommits.has(commit.hash)}
+              diff={commitDiffs[commit.hash]}
+              isMobile={isMobile}
+              wrapText={wrapText}
+              onToggle={() => toggleCommitExpanded(commit.hash)}
+            />
+          ))}
+        </div>
+      )}
+    </div>
+  );
+}