chore: set COMPOSER_HOME for shared hosting deployment

public/git-pull.php

@@ -141,8 +141,8 @@ execute("git clean -fd 2>&1"); // Force clean untracked files and directories
 // 2. Pull latest changes
 execute("git pull origin main 2>&1");
 
-// 3. Install composer dependencies
-execute("composer install --no-dev --optimize-autoloader 2>&1");
+// 3. Install composer dependencies (set COMPOSER_HOME to /tmp to avoid permission errors on shared hosting)
+execute("export COMPOSER_HOME=/tmp && composer install --no-dev --optimize-autoloader 2>&1");
 
 // 4. Re-optimize Laravel cache and run migrations
 execute("php artisan optimize:clear 2>&1");