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/WorkspaceTitle/index.css

@@ -0,0 +1,84 @@
+.workspace-title {
+  min-width: 0;
+  display: flex;
+  align-items: center;
+  gap: 6px;
+}
+
+.moteva-mark {
+  width: 1.8rem;
+  height: 1.8rem;
+  display: grid;
+  place-items: center;
+  border-radius: 999px;
+  color: #fff;
+  background: #000;
+}
+
+.workspace-brand-mark {
+  width: 0.79rem;
+  height: 1.1rem;
+  display: block;
+}
+
+.workspace-title-name {
+  min-width: 0;
+  max-width: 170px;
+  height: 26px;
+  display: flex;
+  align-items: center;
+  border-radius: 6px;
+  color: #1f2329;
+  background: transparent;
+}
+
+.workspace-title-name:hover {
+  background: #f2f3f5;
+}
+
+.workspace-title-name strong {
+  overflow: hidden;
+  max-width: 160px;
+  font-size: 12px;
+  font-weight: 850;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.workspace-title-edit {
+  width: min(220px, 28vw);
+  height: 26px;
+  display: flex;
+  align-items: center;
+  gap: 4px;
+  padding: 0;
+  background: transparent;
+}
+
+.workspace-title-edit input {
+  min-width: 0;
+  width: 100%;
+  height: 100%;
+  border: 0;
+  outline: 0;
+  background: transparent;
+  color: #1f2329;
+  font: inherit;
+  font-size: 12px;
+  font-weight: 850;
+  line-height: 26px;
+}
+
+.title-ghost {
+  width: 22px;
+  height: 22px;
+  display: grid;
+  place-items: center;
+  border-radius: 6px;
+  color: #737780;
+  background: transparent;
+}
+
+.title-ghost:hover {
+  background: #f2f3f5;
+}