feat(claude-code): add subdomain variable and logic

[DevelopmentCats]

Closes #

Description

• Introduces subdomain variable
• Logic for subdomain and base path

Tested with and without subdomain to ensure no breaking changes

Type of Change

• New module
• Bug fix
• Feature/enhancement
• Documentation
• Other

Module Information

Path: registry/coder/modules/claude-code
New version: v2.2.0
Breaking change: [X] Yes [ ] No

Testing & Validation

• Tests pass (bun test)
• Code formatted (bun run fmt)
• Changes tested locally

Related Issues

[Copilot]

Pull Request Overview

This PR introduces subdomain routing support for the Claude Code module, allowing users to choose between subdomain and path-based routing. The changes enhance the module's flexibility while maintaining backward compatibility.

• Added subdomain variable to control routing method (subdomain vs. path-based)
• Updated AgentAPI version from v0.3.0 to v0.3.3 to support required environment variable configuration
• Implemented conditional logic for base paths and environment variables based on subdomain setting

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.

File	Description
main.tf	Added subdomain variable, conditional path logic, and updated AgentAPI version
README.md	Updated version references from 2.1.0 to 2.2.0

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[hugodutka]

The logic looks good to me, but it's a shame it's getting duplicated here - it's already present in the agentapi module.

It's high time we migrated the claude code module to use the agentapi module - the divergence is getting hard to manage.

I haven't tested this locally, so please make sure it works before merging.

[matifali]

It's on list the list @hugodutka.
@35C4n0r will be doing that next.

[DevelopmentCats]

The logic looks good to me, but it's a shame it's getting duplicated here - it's already present in the agentapi module.

It's high time we migrated the claude code module to use the agentapi module - the divergence is getting hard to manage.

I haven't tested this locally, so please make sure it works before merging.

I tested this locally with and without the subdomain option to verify it works and that it doesn't break any existing templates, and it was working perfectly.

[matifali]

@DevelopmentCats Lets merge and unblock @greg-the-coder