fix: the trial's mechanical faults -- approval label, import path, stats, annotate path, red kind

voyage-lekerepo end-to-end trial (2026-10-06), report points 8, 10, 12, 15, 16:

- approval-log: «Approve (Recommended)» / «Godkjenn (anbefalt)» is the
  approval it labels; the suffix never turns a hollow answer into a yes.
- trekexecute Phase 8: the state-file block imports atomic-write through
  ${CLAUDE_PLUGIN_ROOT}; a relative import only ran with cwd = plugin root
  (the test runs the block from another directory).
- trekreview, trekresearch, trekcontinue: stats go through stats-append like
  the other commands, and a failed write is reported, never skipped
  silently (closes the open STATE finding for all three). The schema
  fixture's stale line refs for these and trekplan are re-measured.
- annotate prints an absolute path, so file://{$ANNOT_HTML} is a live link.
- red-proof: `red_kind` = load-error | test-failure on a proven red.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

commands/trekcontinue.md

@@ -285,13 +285,21 @@ disk. Cannot continue automatically.` and exit. Do not guess.
 
 ## Phase 5 — Stats tracking
 
-Append a one-line JSON record to `${CLAUDE_PLUGIN_DATA}/trekcontinue-stats.jsonl`
-if the env var is set; silently skip otherwise.
+Append one record to `trekcontinue-stats.jsonl` in the plugin data directory.
+Run it exactly like this. The record goes on stdin, and the writer resolves
+the directory: `CLAUDE_PLUGIN_DATA`, which the Bash tool env does not carry,
+else the directory `scripts/yardstick.mjs` reads.
 
-```json
+```bash
+node ${CLAUDE_PLUGIN_ROOT}/lib/stats/stats-append.mjs trekcontinue <<'JSON'
 {"ts":"<iso-8601>","project":"<project>","next_session_label":"<label>","status":"<status>"}
+JSON
 ```
 
+The writer prints `{"written": true, ...}`. On `"written": false` (exit 1),
+print its `reason` in one line and continue. A tracking failure never blocks
+the main workflow, but it is reported, not skipped silently.
+
 ## Profile (v4.1) — inheritance from plan-frontmatter
 
 Accepts `--profile <name>` where `<name>` is `economy`, `balanced`, `premium`,