chore(voyage): release v5.0.0 — remove bespoke playground + /trekrevise + Handover 8; render produced artifacts to HTML + link, annotate via /playground

The v4.2/v4.3 bespoke playground SPA (~388 KB), the /trekrevise command,
Handover 8 (annotation → revision), the supporting lib/ modules
(anchor-parser, annotation-digest, markdown-write, revision-guard), the
Playwright e2e suite, and the @playwright/test / @axe-core/playwright
devDeps are removed. A browser walkthrough found the playground borderline
unusable, and it duplicated the official /playground plugin's
document-critique / diff-review templates.

In their place: scripts/render-artifact.mjs — a small, zero-dependency
renderer that turns a brief/plan/review .md into a self-contained,
design-system-styled, zero-network .html (frontmatter folded into a
<details> block). /trekbrief, /trekplan, and /trekreview call it on their
last step and print the file:// link; to annotate, run /playground
(document-critique) on the .md and paste the generated prompt back.

Resolves the v4.3.1-deferred findings as moot (their target files are
deleted). npm test green: 509 tests, 507 pass, 0 fail, 2 skipped.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

plugins/voyage/commands/trekreview.md

@@ -262,6 +262,17 @@ Append a stats line to `${CLAUDE_PLUGIN_DATA}/trekreview-stats.jsonl`
 If `${CLAUDE_PLUGIN_DATA}` is unset or not writable, skip stats silently.
 Never let stats failures block the main workflow.
 
+**Render to HTML + link (annotation via /playground):** after `review.md`
+is final, render it to a self-contained HTML view in the same directory:
+
+```bash
+node ${CLAUDE_PLUGIN_ROOT}/scripts/render-artifact.mjs "{review_path}"
+```
+
+This writes `{project_dir}/review.html` — zero-network, design-system-styled.
+If it exits non-zero, surface a one-line warning and continue — the rendered
+view is a convenience, not a gate.
+
 ## Phase 8.5 — Validate-only mode (`--validate`)
 
 When `mode == validate`:
@@ -282,6 +293,7 @@ After the write succeeds, print:
 **Brief:** {brief_path}
 **Project:** {project_dir}
 **Review:** {review_path}
+**Rendered:** file://{abs path to review.html}
 **Scope:** {before_sha}..{after_sha} ({reviewed_files_count} files)
 **Verdict:** {BLOCK | WARN | ALLOW}
 
@@ -297,9 +309,11 @@ After the write succeeds, print:
 {up to 5 highest-severity findings}
 
 You can:
-- Read the full review at {review_path}
+- Read the full review at {review_path} (or open review.html in a browser)
 - Feed BLOCKER + MAJOR findings into a follow-up plan:
     /trekplan --brief {review_path}
+- Annotate: run the `/playground` plugin (document-critique template) on
+  review.md and paste the generated prompt back here
 - Re-run with `--quick` for a faster correctness-only pass
 - Re-run with `--since <ref>` to narrow scope
 ```