Initial commit: img-infinite-canvas AI design workbench MVP

Moteva-style AI design workbench replica. Home prompt creates a project;
the project page provides an infinite canvas with node drag, zoom/pan,
a design chat panel, history replay, image asset upload, and project
save/regenerate.

- Backend: go-zero, DDD layering, sqlc/pgx, optional PostgreSQL; memory
  or Redis cache; asynq job queue; MinIO/S3/R2/OSS object storage;
  sky-valley/pi agent runtime adapter.
- Frontend: Next.js App Router + Vite artifact build, TypeScript, i18n,
  shadcn/ui components, auth (OTP/Turnstile/Google/WeChat).
- Deploy: Docker Compose and k3s manifests.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

frontend/src/ui/components/ProjectCard/index.tsx

@@ -0,0 +1,45 @@
+"use client";
+
+import { Check, X } from "lucide-react";
+import type { ProjectSummary } from "@/domain/design";
+import { useI18n } from "@/i18n/i18n";
+import { ProjectThumb } from "@/ui/components/ProjectThumb";
+
+type ProjectCardProps = {
+  project: ProjectSummary;
+  editMode?: boolean;
+  selected?: boolean;
+  onActivate: () => void;
+  onDelete?: () => void;
+};
+
+export function ProjectCard({ project, editMode = false, selected = false, onActivate, onDelete }: ProjectCardProps) {
+  const { t, locale } = useI18n();
+
+  return (
+    <div className={`project-card-shell ${editMode ? "is-selecting" : ""} ${selected ? "selected" : ""}`}>
+      {editMode && (
+        <span className="project-card-selection" aria-hidden="true">
+          {selected && <Check size={14} />}
+        </span>
+      )}
+      <button className="project-card" onClick={onActivate} aria-pressed={editMode ? selected : undefined}>
+        <ProjectThumb variant={project.thumbnail} />
+        {!editMode && <span className="project-card-overlay">{t("continueEditing")}</span>}
+        <strong>{project.title}</strong>
+        <small>{formatProjectDate(project.updatedAt, locale)}</small>
+      </button>
+      {!editMode && onDelete && (
+        <button className="project-delete-button" aria-label={t("contextDelete")} onClick={onDelete}>
+          <X size={14} />
+        </button>
+      )}
+    </div>
+  );
+}
+
+function formatProjectDate(value: string, locale: string) {
+  const date = new Date(value);
+  if (Number.isNaN(date.getTime())) return value;
+  return new Intl.DateTimeFormat(locale, { month: "short", day: "numeric", hour: "2-digit", minute: "2-digit" }).format(date);
+}