refactor: centralize tool status symbols in constants (#7054)

packages/cli/src/ui/constants.ts

@@ -19,3 +19,13 @@ export const SHELL_COMMAND_NAME = 'Shell Command';
 export const SCREEN_READER_USER_PREFIX = 'User: ';
 
 export const SCREEN_READER_MODEL_PREFIX = 'Model: ';
+
+// Tool status symbols used in ToolMessage component
+export const TOOL_STATUS = {
+  SUCCESS: '✓',
+  PENDING: 'o',
+  EXECUTING: '⊷',
+  CONFIRMING: '?',
+  CANCELED: '-',
+  ERROR: 'x',
+} as const;