Add build verification and test credential checking

- Build script now shows summary of embedded credentials after build
- quick-test.sh now checks if binary has credentials before running
- This prevents the "dial tcp :143" empty server error

Tests if help output shows empty string in default values.

build.sh

@@ -135,6 +135,32 @@ go build \
   -o ~/bin/nextcloud-mail
 echo "✓ nextcloud-mail built successfully"
 
+# Verification: Show what credentials were embedded
+echo ""
+echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+echo "  Build Verification Summary"
+echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+echo "  IMAP Server: $IMAP_SERVER"
+echo "  IMAP Port: $IMAP_PORT"
+echo "  IMAP Username: $IMAP_USER"
+echo "  IMAP Password: [$(echo "$IMAP_PASS" | sed 's/./*/g')]"
+echo "  SMTP Server: $SMTP_SERVER"
+echo "  SMTP Port: $SMTP_PORT"
+echo "  SMTP Username: $SMTP_USER"
+echo "  SMTP Password: [$(echo "$SMTP_PASS" | sed 's/./*/g')]"
+echo "  Use SSL: $USE_SSL"
+echo "  Ignore Certs: $IGNORE_CERTS"
+echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+echo ""
+
+if [ -z "$IMAP_USER" ] || [ -z "$IMAP_PASS" ]; then
+  echo "⚠️  Warning: IMAP username or password appears to be empty!"
+  echo "   The binary was built but may not work correctly."
+  echo "   If this is incorrect, please rebuild with valid credentials."
+fi
+
+echo ""
+
 echo ""
 echo "All tools built successfully!"
 echo ""

quick-test.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 # Quick Test Script for nextcloud-mail
-# Usage: ./quick-test.sh <username>
+# Usage: ./quick-test.sh
 
 set -e
 
@@ -11,6 +11,20 @@ echo "========================================="
 echo "nextcloud-mail Quick Test Suite"
 echo "========================================="
 echo ""
+
+# Check if binary has credentials before running
+echo "Checking binary credentials..."
+if ~/bin/nextcloud-mail --help 2>&1 | grep -q '"imap-server".*"\"\"'; then
+  echo "❌ Error: nextcloud-mail binary was built with empty credentials!"
+  echo "   Please run ./build.sh again and provide valid IMAP/SMTP credentials."
+  echo ""
+  echo "Current binary shows:"
+  ~/bin/nextcloud-mail --help 2>&1 | grep -A2 '"imap-server"'
+  echo ""
+  exit 1
+fi
+
+echo "✓ Binary has credentials configured"
 echo "Username: $USERNAME"
 echo "Test Directory: $TEST_DIR"
 echo ""