CLI: fix Cloud Code Assist 400 API errors and missing session exports

- Add sanitizeToolCallId() to fix Cloud Code Assist tool call ID validation
- Apply sanitization in sanitizeSessionMessagesImages() for toolResult and assistant messages
- Add legacy CONFIG_PATH_CLAWDIS and STATE_DIR_CLAWDIS exports for backward compatibility
- Resolves Cloud Code Assist rejection of invalid tool call IDs with pipe characters
- Fixes missing session export functions that were blocking system startup

Addresses Cloud Code Assist API 400 errors from invalid tool call IDs like 'call_abc123|item_456'

src/config/paths.ts

@@ -44,6 +44,9 @@ function resolveUserPath(input: string): string {
 
 export const STATE_DIR_CLAWDBOT = resolveStateDir();
 
+// Legacy exports for backward compatibility during Clawdis → Clawdbot rebrand
+export const STATE_DIR_CLAWDIS = STATE_DIR_CLAWDBOT;
+
 /**
  * Config file path (JSON5).
  * Can be overridden via CLAWDBOT_CONFIG_PATH environment variable.
@@ -60,6 +63,9 @@ export function resolveConfigPath(
 
 export const CONFIG_PATH_CLAWDBOT = resolveConfigPath();
 
+// Legacy exports for backward compatibility during Clawdis → Clawdbot rebrand
+export const CONFIG_PATH_CLAWDIS = CONFIG_PATH_CLAWDBOT;
+
 export const DEFAULT_GATEWAY_PORT = 18789;
 
 const OAUTH_FILENAME = "oauth.json";