feat(api-tokens): add ability to roll (regenerate) API token secrets and UI to display the newly generated token once

ts/config/classes.api-token-manager.ts

@@ -122,6 +122,24 @@ export class ApiTokenManager {
     return true;
   }
 
+  /**
+   * Roll (regenerate) a token's secret while keeping its identity.
+   * Returns the new raw token value (shown once).
+   */
+  public async rollToken(id: string): Promise<{ id: string; rawToken: string } | null> {
+    const stored = this.tokens.get(id);
+    if (!stored) return null;
+
+    const randomBytes = plugins.crypto.randomBytes(32);
+    const rawPayload = `${id}:${randomBytes.toString('base64url')}`;
+    const rawToken = `${TOKEN_PREFIX_STR}${rawPayload}`;
+
+    stored.tokenHash = plugins.crypto.createHash('sha256').update(rawToken).digest('hex');
+    await this.persistToken(stored);
+    logger.log('info', `API token '${stored.name}' rolled (id: ${id})`);
+    return { id, rawToken };
+  }
+
   /**
    * Enable or disable a token.
    */