Fix symlink creation issues and add installation verification checks for the installer scripts

install-tea-cli.sh

@@ -409,6 +409,15 @@ install_tea_from_binary() {
     # Install the binary with version suffix
     $install_cmd "$TEMP_DIR/$binary_name" "$TARGET_DIR/tea-$version"
 
+    # Verify installation
+    if [[ ! -f "$TARGET_DIR/tea-$version" ]]; then
+        print_error "Failed to install Tea CLI binary"
+        return 1
+    fi
+
+    # Remove any existing tea symlink or file to avoid conflicts
+    rm -f "$TARGET_DIR/tea"
+
     # Create/update symlink to point to this version
     $symlink_cmd "$TARGET_DIR/tea-$version" "$TARGET_DIR/tea"