[handlers] add link response headers

[capcom6]

Summary by CodeRabbit

• New Features
  • Root endpoint (/) now redirects to the public path with HTTP 301 status
  • Legacy /api paths automatically redirect to /api/docs documentation with HTTP 301 status
  • Link headers added to redirect responses for improved API discoverability

[coderabbitai]

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: d670bd96-392a-42ff-8537-2a9bd82f84a0

📥 Commits

Reviewing files that changed from the base of the PR and between 8b2cf00 and b803b73.

📒 Files selected for processing (1)

• internal/sms-gateway/handlers/root.go

📝 Walkthrough

Walkthrough

The root handler gains an explicit GET "/" route that calls a new setLinkHeaders helper and redirects to PublicPath with HTTP 301. The registerOpenAPI middleware is updated to call the same setLinkHeaders before redirecting /api and /api/ to /api/docs. A no-redirect HTTP test request for the root endpoint is added.

Changes

Root redirect and Link header wiring

Layer / File(s)

Summary

Root handler, Link header helper, and /api middleware update internal/sms-gateway/handlers/root.go, api/requests.http

Register routes GET "/" to handleRoot, which calls setLinkHeaders and issues a 301 to PublicPath. setLinkHeaders trims the trailing slash from PublicPath and writes a Link header with API catalog/service-doc references. registerOpenAPI middleware now calls setLinkHeaders before redirecting /api and /api/ to /api/docs. A # @no-redirect`` HTTP test request for http://localhost:3000/ is added to validate the response.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title '[handlers] add link response headers' accurately describes the main change: adding Link response headers to handlers in the root.go file, and is clear and specific.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@internal/sms-gateway/handlers/root.go`:
- Line 42: The return statement using c.Redirect method is returning an
unwrapped error from an external package, which violates the wrapcheck linter.
Either wrap the error returned by c.Redirect using fmt.Errorf with the %w verb
to add context, or add a //nolint:wrapcheck comment on the line if returning the
error unwrapped is intentional for this passthrough case.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 97695654-5aa3-426a-a3a6-d0c088df80cc

📥 Commits

Reviewing files that changed from the base of the PR and between f914877 and 8b2cf00.

📒 Files selected for processing (2)

• api/requests.http
• internal/sms-gateway/handlers/root.go

[github-actions]

🤖 Pull request artifacts

Platform	File
🐳 Docker	GitHub Container Registry
🍎 Darwin arm64	server_Darwin_arm64.tar.gz
🍎 Darwin x86_64	server_Darwin_x86_64.tar.gz
🐧 Linux arm64	server_Linux_arm64.tar.gz
🐧 Linux i386	server_Linux_i386.tar.gz
🐧 Linux x86_64	server_Linux_x86_64.tar.gz
🪟 Windows arm64	server_Windows_arm64.zip
🪟 Windows i386	server_Windows_i386.zip
🪟 Windows x86_64	server_Windows_x86_64.zip