feat(coding): add conversation archive and first-message titles

src/pages/Chat/CodingConversationRenameDialog.tsx

@@ -0,0 +1,46 @@
+import { useState } from 'react';
+import { Button } from '@/components/ui/button';
+import { Input } from '@/components/ui/input';
+import { Dialog, DialogContent, DialogDescription, DialogFooter, DialogHeader, DialogTitle } from '@/components/ui/dialog';
+
+export function CodingConversationRenameDialog({ title, onSave, onClose }: {
+  title: string;
+  onSave(title: string): Promise<void>;
+  onClose(): void;
+}) {
+  const [draft, setDraft] = useState(title);
+  const [saving, setSaving] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+  return (
+    <Dialog open onOpenChange={(open) => { if (!open && !saving) onClose(); }}>
+      <DialogContent onOpenAutoFocus={(event) => {
+        event.preventDefault();
+        const input = document.getElementById('coding-rename-title') as HTMLInputElement | null;
+        input?.focus();
+        input?.select();
+      }}>
+        <form onSubmit={(event) => {
+          event.preventDefault();
+          if (!draft.trim() || saving) return;
+          setSaving(true);
+          setError(null);
+          void onSave(draft.trim()).then(onClose).catch((reason) => {
+            setError(reason instanceof Error ? reason.message : String(reason));
+          }).finally(() => setSaving(false));
+        }}>
+          <DialogHeader>
+            <DialogTitle>修改对话标题</DialogTitle>
+            <DialogDescription>手动命名后，标题不会再自动更新。</DialogDescription>
+          </DialogHeader>
+          <Input id="coding-rename-title" className="my-4" value={draft} maxLength={200}
+            aria-label="对话标题" disabled={saving} onChange={(event) => setDraft(event.target.value)} />
+          {error && <p role="alert" className="mb-3 text-sm text-destructive">{error}</p>}
+          <DialogFooter>
+            <Button type="button" variant="outline" disabled={saving} onClick={onClose}>取消</Button>
+            <Button type="submit" disabled={saving || !draft.trim()}>{saving ? '保存中…' : '保存'}</Button>
+          </DialogFooter>
+        </form>
+      </DialogContent>
+    </Dialog>
+  );
+}