Filter only executable files in local tools copying

Ensure that only executable files are copied from LOCAL_TOOLS_DIR to avoid copying non-executable or invalid files. Added check for executable permission (-x) alongside file existence (-f).

install.sh

@@ -53,7 +53,7 @@ fi
 LOCAL_TOOLS_DIR="$CLAUDE_DIR/tools-local"
 if [[ -d "$LOCAL_TOOLS_DIR" ]]; then
     for src in "$LOCAL_TOOLS_DIR"/*; do
-        [[ -f "$src" ]] || continue
+        [[ -f "$src" && -x "$src" ]] || continue
         name="$(basename "$src")"
         cp "$src" "$CLAUDE_DIR/llm-functions/bin/$name"
         chmod +x "$CLAUDE_DIR/llm-functions/bin/$name"