chore: unify dev setup with concurrently

Adds concurrently to start both the Vite frontend and Hono backend simultaneously in one terminal via the `bun run dev` command. Also updates documentation in README.md and CLAUDE.md to reflect the new development workflow.

CLAUDE.md

@@ -9,7 +9,8 @@ GearBox is a single-user web app for managing gear collections (bikepacking, sim
 ## Commands
 
 ```bash
-# Development (run both in separate terminals)
+# Development
+bun run dev                 # Starts both Vite client (:5173) and Hono server (:3000) concurrently
 bun run dev:client          # Vite dev server on :5173 (proxies /api to :3000)
 bun run dev:server          # Hono server on :3000 with hot reload
 

README.md

@@ -10,7 +10,7 @@ A single-user web app for managing gear collections (bikepacking, sim racing, et
 - Research threads for comparing candidates before buying
 - Image uploads for items and candidates
 
-## Quick Start
+## Quick Start (Docker)
 
 ### Docker Compose (recommended)
 
@@ -81,3 +81,42 @@ docker compose up -d
 ```
 
 Database migrations run automatically on startup.
+
+## Tech Stack
+
+- **Runtime & Package Manager:** [Bun](https://bun.sh)
+- **Frontend:** React 19, Vite, TanStack Router, TanStack Query, Tailwind CSS v4, Zustand
+- **Backend:** Hono, Drizzle ORM, SQLite (`bun:sqlite`)
+
+## Local Development Setup
+
+### Prerequisites
+
+You must have [Bun](https://bun.sh/) installed on your machine. Docker is not required for local development.
+
+### Installation
+
+1. Install all dependencies:
+   ```bash
+   bun install
+   ```
+
+2. Initialize the local SQLite database (`gearbox.db`):
+   ```bash
+   bun run db:push
+   ```
+
+3. Start the development servers:
+   ```bash
+   bun run dev
+   ```
+   This single command will start both the Vite frontend server (port `5173`) and the Hono backend server (port `3000`) concurrently. 
+
+Open [http://localhost:5173](http://localhost:5173) in your browser to view the app.
+
+## Additional Commands
+
+- `bun run build` — Build the production assets into `dist/client/`
+- `bun test` — Run the test suite
+- `bun run lint` — Check formatting and lint rules using Biome
+- `bun run db:generate` — Generate Drizzle migrations after making schema changes

package.json

@@ -4,6 +4,7 @@
   "type": "module",
   "private": true,
   "scripts": {
+    "dev": "concurrently -k -c \"blue,green\" -n \"server,client\" \"bun run dev:server\" \"bun run dev:client\"",
     "dev:client": "vite",
     "dev:server": "bun --hot src/server/index.ts",
     "build": "vite build",
@@ -23,6 +24,7 @@
     "@types/react-dom": "^19.2.3",
     "@vitejs/plugin-react": "^6.0.1",
     "better-sqlite3": "^12.8.0",
+    "concurrently": "^9.1.2",
     "drizzle-kit": "^0.31.9",
     "vite": "^8.0.0"
   },