fix(ai, config): Correct Anthropic API calls and improve model config UI

Resolves persistent 404 'Not Found' errors when calling Anthropic models via the Vercel AI SDK. The primary issue was likely related to incorrect or missing API headers.

- Refactors Anthropic provider (src/ai-providers/anthropic.js) to use the standard 'anthropic-version' header instead of potentially outdated/incorrect beta headers when creating the client instance.

- Updates the default fallback model ID in .taskmasterconfig to 'claude-3-5-sonnet-20241022'.

- Fixes the interactive model setup (task-master models --setup) in scripts/modules/commands.js to correctly filter and default the main model selection.

- Improves the cost display in the 'task-master models' command output to explicitly show 'Free' for models with zero cost.

- Updates description for the 'id' parameter in the 'set_task_status' MCP tool definition for clarity.

- Updates list of models and costs

src/ai-providers/anthropic.js

@@ -27,9 +27,14 @@ function getClient(apiKey) {
 	// Remove the check for anthropicClient
 	// if (!anthropicClient) {
 	// TODO: Explore passing options like default headers if needed
-	// Create and return a new instance directly
+	// Create and return a new instance directly with standard version header
 	return createAnthropic({
-		apiKey: apiKey
+		apiKey: apiKey,
+		baseURL: 'https://api.anthropic.com/v1',
+		// Use standard version header instead of beta
+		headers: {
+			'anthropic-beta': 'output-128k-2025-02-19'
+		}
 	});
 	// }
 	// return anthropicClient;
@@ -63,10 +68,8 @@ export async function generateAnthropicText({
 			model: client(modelId),
 			messages: messages,
 			maxTokens: maxTokens,
-			temperature: temperature,
-			headers: {
-				'anthropic-beta': 'output-128k-2025-02-19'
-			}
+			temperature: temperature
+			// Beta header moved to client initialization
 			// TODO: Add other relevant parameters like topP, topK if needed
 		});
 		log(
@@ -125,10 +128,8 @@ export async function streamAnthropicText({
 			model: client(modelId),
 			messages: messages,
 			maxTokens: maxTokens,
-			temperature: temperature,
-			headers: {
-				'anthropic-beta': 'output-128k-2025-02-19'
-			}
+			temperature: temperature
+			// Beta header moved to client initialization
 			// TODO: Add other relevant parameters
 		});
 
@@ -178,6 +179,13 @@ export async function generateAnthropicObject({
 	);
 	try {
 		const client = getClient(apiKey);
+
+		// Log basic debug info
+		log(
+			'debug',
+			`Using maxTokens: ${maxTokens}, temperature: ${temperature}, model: ${modelId}`
+		);
+
 		const result = await generateObject({
 			model: client(modelId),
 			mode: 'tool', // Anthropic generally uses 'tool' mode for structured output
@@ -191,12 +199,14 @@ export async function generateAnthropicObject({
 			temperature: temperature,
 			maxRetries: maxRetries
 		});
+
 		log(
 			'debug',
 			`Anthropic generateObject result received. Tokens: ${result.usage.completionTokens}/${result.usage.promptTokens}`
 		);
 		return result.object;
 	} catch (error) {
+		// Simple error logging
 		log(
 			'error',
 			`Anthropic generateObject ('${objectName}') failed: ${error.message}`