refactor(coder/claude-code): support terraform provider coder 2.12.0 (#488)

## Description

Updates the module to use the new version of the agentapi module for the
upcoming Coder 2.28 release

## Type of Change

- [ ] New module
- [ ] New template
- [ ] Bug fix
- [x] Feature/enhancement
- [ ] Documentation
- [ ] Other

## Module Information

**Path:** `registry/coder/modules/claude-code`  
**New version:** `v4.0.0`  
**Breaking change:** [x] Yes [ ] No

## Testing & Validation

- [x] Tests pass (`bun test`)
- [x] Code formatted (`bun fmt`)
- [ ] Changes tested locally

## Related Issues

- https://github.com/coder/internal/issues/1065

## Related PRs

- https://github.com/coder/registry/pull/485
- https://github.com/coder/registry/pull/497

Co-authored-by: Cian Johnston <cian@coder.com>

registry/coder/modules/claude-code/README.md

@@ -13,7 +13,7 @@ Run the [Claude Code](https://docs.anthropic.com/en/docs/agents-and-tools/claude
 ```tf
 module "claude-code" {
   source         = "registry.coder.com/coder/claude-code/coder"
-  version        = "3.4.4"
+  version        = "4.0.0"
   agent_id       = coder_agent.example.id
   workdir        = "/home/coder/project"
   claude_api_key = "xxxx-xxxxx-xxxx"
@@ -70,7 +70,7 @@ data "coder_parameter" "ai_prompt" {
 
 module "claude-code" {
   source   = "registry.coder.com/coder/claude-code/coder"
-  version  = "3.4.4"
+  version  = "4.0.0"
   agent_id = coder_agent.example.id
   workdir  = "/home/coder/project"
 
@@ -106,7 +106,7 @@ Run and configure Claude Code as a standalone CLI in your workspace.
 ```tf
 module "claude-code" {
   source              = "registry.coder.com/coder/claude-code/coder"
-  version             = "3.4.4"
+  version             = "4.0.0"
   agent_id            = coder_agent.example.id
   workdir             = "/home/coder"
   install_claude_code = true
@@ -129,7 +129,7 @@ variable "claude_code_oauth_token" {
 
 module "claude-code" {
   source                  = "registry.coder.com/coder/claude-code/coder"
-  version                 = "3.4.4"
+  version                 = "4.0.0"
   agent_id                = coder_agent.example.id
   workdir                 = "/home/coder/project"
   claude_code_oauth_token = var.claude_code_oauth_token
@@ -202,7 +202,7 @@ resource "coder_env" "bedrock_api_key" {
 
 module "claude-code" {
   source   = "registry.coder.com/coder/claude-code/coder"
-  version  = "3.4.4"
+  version  = "4.0.0"
   agent_id = coder_agent.example.id
   workdir  = "/home/coder/project"
   model    = "global.anthropic.claude-sonnet-4-5-20250929-v1:0"
@@ -259,7 +259,7 @@ resource "coder_env" "google_application_credentials" {
 
 module "claude-code" {
   source   = "registry.coder.com/coder/claude-code/coder"
-  version  = "3.4.4"
+  version  = "4.0.0"
   agent_id = coder_agent.example.id
   workdir  = "/home/coder/project"
   model    = "claude-sonnet-4@20250514"

registry/coder/modules/claude-code/main.tf

@@ -4,7 +4,7 @@ terraform {
   required_providers {
     coder = {
       source  = "coder/coder"
-      version = ">= 2.7"
+      version = ">= 2.12"
     }
   }
 }
@@ -270,7 +270,7 @@ resource "coder_env" "claude_api_key" {
 
 locals {
   # we have to trim the slash because otherwise coder exp mcp will
-  # set up an invalid claude config 
+  # set up an invalid claude config
   workdir                           = trimsuffix(var.workdir, "/")
   app_slug                          = "ccw"
   install_script                    = file("${path.module}/scripts/install.sh")
@@ -313,9 +313,8 @@ locals {
 }
 
 module "agentapi" {
-
   source  = "registry.coder.com/coder/agentapi/coder"
-  version = "1.2.0"
+  version = "2.0.0"
 
   agent_id             = var.agent_id
   web_app_slug         = local.app_slug
@@ -379,3 +378,7 @@ module "agentapi" {
     /tmp/install.sh
   EOT
 }
+
+output "task_app_id" {
+  value = module.agentapi.task_app_id
+}