fix(tarko): handle CLI parameter order for agent argument (bytedance#1169)

Fix CLI parameter handling issue where `tarko --agent ./` command failed due to incorrect parameter order processing in the run command action handler after PR bytedance#1158.

Solution:
- Simplified parameter handling based on CAC's actual argument passing pattern
- Added user-friendly warnings for conflicting agent parameters
- Maintained backward compatibility for all syntax variations

Supported syntax:
- `tarko --agent ./` (legacy syntax)
- `tarko run ./` (new syntax) 
- `tarko ./` (simplified syntax)

Author: ulivz

multimodal/tarko/agent-cli/src/core/cli.ts

@@ -1,3 +1,4 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
 /*
  * Copyright (c) 2025 Bytedance, Inc. and its affiliates.
  * SPDX-License-Identifier: Apache-2.0
@@ -197,22 +198,39 @@ export class AgentCLI {
 
     // Apply agent-specific configurations for commands that run agents
     configuredCommand = this.configureAgentCommand(configuredCommand);
-    configuredCommand.action(
-      async (agent: string | undefined, cliArguments: AgentCLIArguments = {}) => {
-        // If agent is provided as positional argument, use it
-        if (agent) {
-          cliArguments.agent = agent;
+    configuredCommand.action(async (...args: any[]) => {
+      // Handle dynamic arguments due to optional positional parameters [run] [agent]
+      // CAC passes arguments in this pattern:
+      // - tarko --agent ./        -> args = [undefined, undefined, cliArguments]
+      // - tarko run              -> args = ['run', undefined, cliArguments]
+      // - tarko run ./           -> args = ['run', './', cliArguments]
+      // - tarko ./               -> args = [undefined, './', cliArguments]
+
+      // The last argument is always the parsed CLI options object
+      const cliArguments: AgentCLIArguments = args[args.length - 1] || {};
+
+      // The second-to-last argument is the agent parameter
+      const agent = args[args.length - 2];
+
+      // If agent is provided as positional argument, use it
+      if (agent && typeof agent === 'string') {
+        // Warn if both positional agent and --agent flag are provided
+        if (cliArguments.agent && cliArguments.agent !== agent) {
+          console.warn(
+            `Warning: Both positional agent '${agent}' and --agent flag '${cliArguments.agent}' provided. Using positional agent '${agent}'.`,
+          );
         }
+        cliArguments.agent = agent;
+      }
 
-        if (cliArguments.headless) {
-          // Headless mode - same as old 'run' command
-          await this.runHeadlessMode(cliArguments);
-        } else {
-          // Interactive UI mode - same as old 'start' command
-          await this.runInteractiveMode(cliArguments);
-        }
-      },
-    );
+      if (cliArguments.headless) {
+        // Headless mode - same as old 'run' command
+        await this.runHeadlessMode(cliArguments);
+      } else {
+        // Interactive UI mode - same as old 'start' command
+        await this.runInteractiveMode(cliArguments);
+      }
+    });
   }
 
   /**