feat: add registry config, image upload/download, and OCI format support

Backend:
- Add registry_address configuration API (GET/POST)
- Add tar image upload with OCI and Docker format support
- Add image download with streaming optimization
- Fix blob download using c.Send (Fiber v3 SendStream bug)
- Add registry_address prefix stripping for all OCI v2 endpoints
- Add AGENTS.md for project documentation

Frontend:
- Add settings store with Snackbar notifications
- Add image upload dialog with progress bar
- Add download state tracking with multi-stage feedback
- Replace alert() with MUI Snackbar messages
- Display image names without registry_address prefix

🤖 Generated with [Qoder](https://qoder.com)

dev.sh

@@ -1,78 +1,69 @@
 #!/usr/bin/env bash
 # Run backend (Go) and frontend (Vite) together; stop both on Ctrl+C
-set -euo pipefail
 
-# Always run from repo root
+set -e
+
+# Colors for output
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+RED='\033[0;31m'
+NC='\033[0m' # No Color
+
+# Get the directory where the script is located
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 cd "$SCRIPT_DIR"
 
-BACKEND_ADDR=${BACKEND_ADDR:-0.0.0.0:9119}
-DATA_DIR=${DATA_DIR:-./x-storage}
-
-# Store PIDs for cleanup
-BACKEND_PID=""
-FRONTEND_PID=""
-
+# Function to cleanup background processes
 cleanup() {
-  echo ""
-  echo "[dev] Shutting down..."
-  
-  # Kill backend if running
-  if [ -n "$BACKEND_PID" ] && kill -0 "$BACKEND_PID" 2>/dev/null; then
-    echo "[dev] Stopping backend (PID: $BACKEND_PID)..."
-    kill "$BACKEND_PID" 2>/dev/null || true
-    wait "$BACKEND_PID" 2>/dev/null || true
-  fi
-  
-  # Kill frontend if running
-  if [ -n "$FRONTEND_PID" ] && kill -0 "$FRONTEND_PID" 2>/dev/null; then
-    echo "[dev] Stopping frontend (PID: $FRONTEND_PID)..."
-    kill "$FRONTEND_PID" 2>/dev/null || true
-    wait "$FRONTEND_PID" 2>/dev/null || true
-  fi
-  
-  # Kill any remaining background jobs
-  if command -v xargs >/dev/null 2>&1; then
-    jobs -p | xargs kill 2>/dev/null || true
-  else
-    # Fallback for systems without xargs -r
-    for job in $(jobs -p); do
-      kill "$job" 2>/dev/null || true
-    done
-  fi
-  
-  # Wait a bit for graceful shutdown
-  sleep 1
-  
-  # Force kill if still running
-  if [ -n "$BACKEND_PID" ] && kill -0 "$BACKEND_PID" 2>/dev/null; then
-    kill -9 "$BACKEND_PID" 2>/dev/null || true
-  fi
-  if [ -n "$FRONTEND_PID" ] && kill -0 "$FRONTEND_PID" 2>/dev/null; then
-    kill -9 "$FRONTEND_PID" 2>/dev/null || true
-  fi
-  
-  echo "[dev] Shutdown complete"
-  exit 0
+    echo -e "\n${YELLOW}Shutting down services...${NC}"
+    if [ ! -z "$BACKEND_PID" ]; then
+        kill $BACKEND_PID 2>/dev/null || true
+        wait $BACKEND_PID 2>/dev/null || true
+    fi
+    if [ ! -z "$FRONTEND_PID" ]; then
+        kill $FRONTEND_PID 2>/dev/null || true
+        wait $FRONTEND_PID 2>/dev/null || true
+    fi
+    echo -e "${GREEN}All services stopped.${NC}"
+    exit 0
 }
 
-trap cleanup INT TERM EXIT
+# Trap Ctrl+C and cleanup
+trap cleanup SIGINT SIGTERM
 
-# Start backend
-echo "[dev] Starting backend on $BACKEND_ADDR (data-dir=$DATA_DIR)"
-go run . --debug --address "$BACKEND_ADDR" --data-dir "$DATA_DIR" &
+# Check if pnpm is available, otherwise use npm
+if command -v pnpm &> /dev/null; then
+    PACKAGE_MANAGER="pnpm"
+elif command -v npm &> /dev/null; then
+    PACKAGE_MANAGER="npm"
+else
+    echo -e "${RED}Error: Neither pnpm nor npm is installed.${NC}"
+    exit 1
+fi
+
+# Check if Go is installed
+if ! command -v go &> /dev/null; then
+    echo -e "${RED}Error: Go is not installed.${NC}"
+    exit 1
+fi
+
+echo -e "${GREEN}Starting backend (Go)...${NC}"
+go run main.go &
 BACKEND_PID=$!
 
 # Wait a moment for backend to start
 sleep 2
 
-# Start frontend
-echo "[dev] Starting frontend dev server (Vite)"
-(cd frontend && pnpm run dev) &
+echo -e "${GREEN}Starting frontend (Vite)...${NC}"
+cd frontend
+$PACKAGE_MANAGER run dev &
 FRONTEND_PID=$!
+cd ..
 
-echo "[dev] Backend PID: $BACKEND_PID, Frontend PID: $FRONTEND_PID"
-echo "[dev] Press Ctrl+C to stop both..."
+echo -e "${GREEN}Both services are running!${NC}"
+echo -e "${YELLOW}Backend PID: $BACKEND_PID${NC}"
+echo -e "${YELLOW}Frontend PID: $FRONTEND_PID${NC}"
+echo -e "${YELLOW}Press Ctrl+C to stop both services${NC}"
 
-# Wait for both processes to exit
-wait $BACKEND_PID $FRONTEND_PID
+# Wait for both processes
+wait $BACKEND_PID $FRONTEND_PID