🐛 fix: prevent duplicate badges with improved detection logic

scripts/ci-update-coverage-badge.sh

@@ -69,6 +69,20 @@ if grep -q "${BADGE_TYPE}_Coverage-${COVERAGE}%" README.md || grep -q "coverage-
     exit 0
 fi
 
+# Also check if badge already exists with this coverage (more flexible pattern)
+if [ "$BADGE_TYPE" = "bdd" ] || [ "$BADGE_TYPE" = "unit" ]; then
+    # Capitalize first letter for badge name
+    if [ "$BADGE_TYPE" = "unit" ]; then
+        BADGE_NAME="Unit"
+    else
+        BADGE_NAME="BDD"
+    fi
+    if grep -q "\[!\[${BADGE_NAME} Coverage\].*${COVERAGE}%" README.md; then
+        echo "Coverage badge already exists at ${COVERAGE}%"
+        exit 0
+    fi
+fi
+
 # Cross-platform sed command
 # Detect if we're on macOS (BSD sed) or Linux (GNU sed)
 SED_CMD=""