release changelog toggles

Objective: Add two controls next to RSS on /docs/releases: one toggles package release notes, the other toggles Plate UI registry changes.

Completion threshold:

Both toggles render next to RSS.
Both toggles are enabled by default.
Package changes can be hidden without hiding Plate UI changes.
Plate UI changes can be hidden without hiding package changes.
/docs/releases still serves and the www typecheck passes.

Verification surface:

pnpm lint:fix
pnpm --filter www typecheck
curl http://localhost:3000/docs/releases
source inspection for the two independent state branches
node .agents/skills/autogoal/scripts/check-complete.mjs docs/plans/2026-06-07-release-changelog-toggles.md

Constraints:

Keep the change scoped to the releases page and release index component.
Do not change registry changelog data.
Do not commit, push, or open a PR.

Boundaries:

Edited apps/www/src/app/(app)/docs/releases/release-page-content.tsx.
Edited apps/www/src/components/release-index.tsx.
Browser surface: /docs/releases.
Tracker sync: N/A, no tracker.
Non-goals: no release layout redesign, no changeset, no registry data edits.

Output budget strategy: Use focused source reads, scoped checks, and short grep/curl verification.

Blocked condition: No blocker remains. The Browser plugin was not exposed by tool discovery, so interaction proof used typecheck plus HTTP-rendered markup/source inspection.

Start Gates:

Gate	Applies	Evidence
Skill analysis before edits	yes	Used `autogoal` and `task`
Active goal checked or created	yes	Active goal created for release toggles
Source of truth read before edits	yes	Read release page and release index components
Tracker comments and attachments read	no	N/A: no tracker source
Video transcript evidence required	no	N/A: no video
`docs/solutions` checked for non-trivial existing-code work	no	N/A: small UI toggle
TDD decision before behavior change or bug fix	yes	N/A: no established component test harness for this page; verified by typecheck and rendered route
Branch decision for code-changing task	yes	N/A: user did not ask for branch or PR
Release artifact decision	yes	N/A: app UI only, no package/runtime release artifact
Browser tool decision for browser surface	yes	Browser tool searched; not exposed in this turn
PR expectation decision	yes	N/A: user did not ask for PR
Tracker sync expectation decision	no	N/A: no tracker
Output budget strategy recorded	yes	Focused source reads and checks
Browser pack selected	yes	`/docs/releases` is a browser surface
Browser route / app surface identified	yes	`/docs/releases`
Browser tool decision recorded	yes	Browser plugin unavailable via tool discovery
Console/network caveat policy recorded	yes	No Browser console access; HTTP route proof recorded

Work Checklist:

Completion Gates:

Gate	Applies	Required action	Evidence
Named verification threshold	yes	Run lint, typecheck, route proof	All passed or recorded below
Bug reproduced before fix	no	N/A	Feature request
Targeted behavior verification	yes	Verify independent booleans in source and rendered buttons	Source has separate `showPackageChanges` and `showPlateUiChanges`; HTML has both pressed by default
TypeScript or typed config changed	yes	Run `www` typecheck	Passed
Package exports or file layout changed	no	N/A	No exports/layout changes
Package manifests, lockfile, or install graph changed	no	N/A	No manifest changes
Agent rules or skills changed	no	N/A	No agent files touched
Workspace authority proof	yes	Run checks in `/Users/zbeyens/git/plate`	Done
Browser surface changed	yes	Verify route	HTTP route proof; Browser plugin unavailable
Browser final proof	yes	Record caveat	No screenshot because Browser tool unavailable
CI-controlled template output changed	no	N/A	No template output touched
Package behavior or public API changed	no	N/A	App UI only
Registry-only component work changed	no	N/A	No registry data/source changed
Docs or content changed	no	N/A	No docs content changed
High-risk mini gate	no	N/A	Small local UI state change
Agent-native review for agent/tooling changes	no	N/A	No agent files changed
Local install corruption suspected	no	N/A	No suspicious failure
Autoreview for non-trivial implementation changes	no	N/A	Trivial two-file UI toggle
PR create or update	no	N/A	User did not ask
Task-style PR body verified	no	N/A	No PR
PR proof image hosting	no	N/A	No PR
Tracker sync-back	no	N/A	No tracker
Final handoff contract	yes	Summarize exact outcome and checks	Ready
Final lint	yes	Run `pnpm lint:fix`	Passed, no fixes
Output budget discipline	yes	Avoid broad output	Followed
Goal plan complete	yes	Run check-complete	Pending final gate
Browser interaction proof	yes	Exercise route or record blocker	Browser plugin unavailable; source/HTTP proof used
Browser console/network check	no	N/A	Browser plugin unavailable
Browser final proof artifact	yes	Record route proof/caveat	`curl` returned 200 and rendered default pressed buttons

Phase / pass table:

Phase	Status	Evidence	Next
Intake and source read	complete	components read	implementation complete
Implementation	complete	two-file patch	verification complete
Verification	complete	lint, typecheck, curl	closeout
PR / tracker sync	complete	N/A	final response
Closeout	complete	plan updated	final response

Verification evidence:

pnpm lint:fix passed with no fixes.
pnpm --filter www typecheck passed, including docs source parity and registry source checks.
curl -sS -o /tmp/plate-releases-toggle.html -w '%{http_code} %{content_type}\n' http://localhost:3000/docs/releases returned 200 text/html; charset=utf-8.
Rendered HTML includes Package changes and Plate UI buttons with aria-pressed="true" next to RSS.

Reboot status: Complete. The toggles are implemented in the releases page header and wired to the release index rendering.

Open risks: Browser plugin was unavailable, so no click screenshot/console proof was captured in this turn.