CRITICAL FIX: Move composer install after containers start

The previous setup scripts ran 'composer install' in a temporary container
before starting the actual containers. This caused vendor/ directory to be
created inside the temporary container and then deleted, leaving the host
filesystem without dependencies.

Changes:
- setup.bat: Move composer install to Step 4 (after containers start)
- setup.sh: Move composer install to Step 4 (after containers start)
- Use 'docker-compose exec' instead of 'docker-compose run --rm'
- This ensures vendor/ is written to the host filesystem via volume mount
- Added TEST_SETUP.md with comprehensive testing procedures

Now the vendor/ directory will persist correctly on Windows/WSL2 and the
app will load without 'vendor/autoload.php not found' errors.

This was the root cause of the setup not being truly '2-minute ready'.

setup.sh

@@ -42,11 +42,10 @@ else
     exit 1
 fi
 
-# Step 2: Install composer dependencies
-echo -e "${YELLOW}→ Installing composer dependencies...${NC}"
+# Step 2: Build containers
+echo -e "${YELLOW}→ Building Docker containers...${NC}"
 docker-compose build
-docker-compose --profile ${DB} run --rm app composer install --no-interaction
-echo -e "${GREEN}✓ Dependencies installed${NC}"
+echo -e "${GREEN}✓ Containers built${NC}"
 echo ""
 
 # Step 3: Start containers
@@ -55,7 +54,13 @@ docker-compose --profile ${DB} up -d
 echo -e "${GREEN}✓ Containers started${NC}"
 echo ""
 
-# Step 4: Wait for database
+# Step 4: Install composer dependencies
+echo -e "${YELLOW}→ Installing composer dependencies...${NC}"
+docker-compose exec app composer install --no-interaction
+echo -e "${GREEN}✓ Dependencies installed${NC}"
+echo ""
+
+# Step 5: Wait for database
 if [ "$DB" = "mysql" ] || [ "$DB" = "pgsql" ]; then
     echo -e "${YELLOW}→ Waiting for database...${NC}"
     sleep 5
@@ -63,25 +68,25 @@ if [ "$DB" = "mysql" ] || [ "$DB" = "pgsql" ]; then
     echo ""
 fi
 
-# Step 5: Generate app key if needed
+# Step 6: Generate app key
 echo -e "${YELLOW}→ Generating application key...${NC}"
 docker-compose exec app php artisan key:generate --force
 echo -e "${GREEN}✓ App key generated${NC}"
 echo ""
 
-# Step 6: Run migrations
+# Step 7: Run migrations
 echo -e "${YELLOW}→ Running database migrations...${NC}"
 docker-compose exec app php artisan migrate --force
 echo -e "${GREEN}✓ Migrations completed${NC}"
 echo ""
 
-# Step 7: Seed database (roles, permissions, admin user)
+# Step 8: Seed database (roles, permissions, admin user)
 echo -e "${YELLOW}→ Seeding database (roles, permissions, admin user)...${NC}"
 docker-compose exec app php artisan db:seed --force
 echo -e "${GREEN}✓ Database seeded${NC}"
 echo ""
 
-# Step 8: Create storage link
+# Step 9: Create storage link
 echo -e "${YELLOW}→ Creating storage symlink...${NC}"
 docker-compose exec app php artisan storage:link
 echo -e "${GREEN}✓ Storage linked${NC}"