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>

README.md

@@ -0,0 +1,112 @@
+# img-infinite-canvas
+
+Moteva 风格的 AI 设计工作台复刻 MVP：主页 Prompt 创建项目，项目页提供无限画布、节点拖拽、缩放平移、右侧设计对话、历史回放、图片资产上传、项目保存与再生成。
+
+## Stack
+
+- Backend: go-zero, DDD layering, sqlc, pgx, PostgreSQL optional persistence
+- Cache: memory or Redis, default memory
+- Agent: sky-valley/pi Go agent runtime adapter, local desktop agent disabled
+- Image storage: memory, MinIO, AWS S3, Cloudflare R2, Aliyun OSS
+- Frontend: Next.js App Router, pnpm, Vite artifact build, TypeScript, gzip, i18n
+- Deploy: local binary, Docker Compose, k3s manifests
+
+## Run Locally
+
+Backend:
+
+```bash
+cd server
+go mod tidy
+go run . -f etc/config.yaml
+```
+
+Frontend:
+
+```bash
+cd frontend
+pnpm install
+pnpm dev
+```
+
+Open `http://localhost:5173`. Next.js rewrites `/api` to `http://localhost:8888` in development. `pnpm build` runs `next build` and `vite build`, producing gzip assets in `frontend/dist`.
+
+## Cache Config
+
+Default in-memory cache:
+
+```yaml
+Cache:
+  Driver: memory
+  TTLSeconds: 300
+```
+
+Redis cache:
+
+```yaml
+Cache:
+  Driver: redis
+  Addr: localhost:6379
+  Password: ""
+  DB: 0
+  TTLSeconds: 300
+```
+
+## Storage Config
+
+Default memory storage is useful for local UI work:
+
+```yaml
+Storage:
+  Driver: memory
+```
+
+## Image Object Storage
+
+Default memory mode is useful for local prototyping. Production can use MinIO, AWS S3, Cloudflare R2, or Aliyun OSS:
+
+```yaml
+ObjectStorage:
+  Driver: minio # memory|minio|s3|aws|r2|aliyun
+  Bucket: canvas-assets
+  Endpoint: localhost:9000
+  Region: us-east-1
+  AccessKey: canvas
+  SecretKey: canvas-secret
+  PublicBase: http://localhost:9000/canvas-assets
+  UseSSL: false
+  ExpiresIn: 900
+```
+
+PostgreSQL storage:
+
+```yaml
+Storage:
+  Driver: postgres
+  DataSource: postgres://canvas:canvas@localhost:5432/canvas?sslmode=disable
+```
+
+## Docker Compose
+
+```bash
+cd deploy
+docker compose up --build
+```
+
+Open `http://localhost:3000`.
+
+## k3s
+
+Build and load/push these images first:
+
+```bash
+docker build -t img-infinite-canvas-api:latest server
+docker build -t img-infinite-canvas-web:latest frontend
+kubectl apply -f deploy/k3s/img-infinite-canvas.yaml
+```
+
+The sample ingress host is `canvas.local`.
+
+## API
+
+See [server/API.md](server/API.md).