fix: add explicit git safe.directory configuration

Adds git safe.directory configuration in post-create.sh to prevent
ownership warnings in devcontainer and Coder workspaces.

This ensures the workspace directory is marked as safe even before
Coder's automatic configuration runs, preventing any permission warnings.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: mohsin-wiser

.devcontainer/post-create.sh

@@ -81,6 +81,20 @@ ensure_dir "$TARGET_HOME/.local/share"
 ensure_dir "$TARGET_HOME/.local/share/code-server"
 ensure_dir "$TARGET_HOME/.config/code-server"
 
+# ============================================
+# Configure git safe directory
+# ============================================
+echo "🔧 Configuring git safe directory..."
+# Mark workspace as safe directory to avoid ownership warnings
+if [ "$(id -u)" = "0" ]; then
+    # Running as root - configure for vscode user
+    su - "$TARGET_USER" -c "git config --global --add safe.directory /workspaces/SimpleAccounts-UAE" 2>/dev/null || true
+else
+    # Running as vscode user - configure directly
+    git config --global --add safe.directory /workspaces/SimpleAccounts-UAE 2>/dev/null || true
+fi
+echo "  ✅ Git safe directory configured"
+
 # ============================================
 # Install npm dependencies
 # ============================================