feat(voyage)!: bulk content rewrite ultra -> voyage/trek prose [skip-docs]

Sed-pipeline (16 patterns, longest-match-first) sweeper residuelle ultra*-treff
i prose, command-narrativ, agent-prompts, hook-kommentarer, doc-prosa.

Pipeline-utvidelser fra V4-prompten:
- BSD-syntax [[:<:]]ultra[[:>:]] istedenfor \bultra\b (BSD sed mangler \b)
- 6 compound-patterns for ultraplan/ultraexecute/ultraresearch/ultrabrief/
  ultrareview/ultracontinue uten -local-suffiks
- ultra*-stats glob -> trek*-stats glob
- Linje-eksklusjon redusert til ultra-cc-architect (Q8); session-state-
  eksklusjonen var over-protektiv
- File-eksklusjon utvidet til settings.json, package.json, plugin.json,
  hele .claude/-treet (gitignored + V5-territorium)

Q8-undantak holdt: architecture-discovery.mjs + project-discovery.mjs urort.
Filnavn-konvensjon holdt: .session-state.local.json + *.local.* preservert.

Manuell narrative-fix: tests/lib/agent-frontmatter.test.mjs linje 10
mangled "/ultra*-local" til "/voyage*-local" (ingen slik kommando finnes);
korrigert til "/trek*".

Residualer utenfor scope (V5 handterer): package.json + .claude-plugin/
plugin.json (Step 12-14 versjons-bump). .claude/* er gitignored
spec-historikk med tilsiktet BEFORE/AFTER-narrativ.

Part of voyage-rebrand session 3 (Wave 4 / Step 10).

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

plugins/ultraplan-local/agents/review-orchestrator.md

@@ -2,13 +2,13 @@
 name: review-orchestrator
 description: |
   Inline reference (v3.2.0) — documents the review workflow that
-  /ultrareview-local executes in main context. This file is NOT spawned
+  /trekreview executes in main context. This file is NOT spawned
   as a sub-agent. The Claude Code harness does not expose the Agent tool
   to sub-agents, so a background orchestrator launched with
   run_in_background: true cannot spawn the reviewer swarm
   (brief-conformance-reviewer, code-correctness-reviewer, review-coordinator)
   and would degrade silently to single-context reasoning. The
-  /ultrareview-local command now orchestrates the phases below directly in
+  /trekreview command now orchestrates the phases below directly in
   the main session.
 model: opus
 color: red
@@ -24,12 +24,12 @@ tools: ["Agent", "Read", "Glob", "Grep", "Write", "Edit", "Bash", "TaskCreate",
      Orchestrator Phase 6   = Command Phase 6   (Coordinator dedup + verdict)
      Orchestrator Phase 7   = Command Phase 7   (Write review.md)
      Orchestrator Phase 8   = Command Phase 8   (Validate + stats)
-     As of v3.2.0, /ultrareview-local runs these phases inline in main
+     As of v3.2.0, /trekreview runs these phases inline in main
      context instead of spawning this agent. Keep this file as the canonical
      reference for what those phases do. -->
 
-This document is the canonical workflow description for the ultrareview
-pipeline as of v3.2.0. The `/ultrareview-local` command reads it as
+This document is the canonical workflow description for the trekreview
+pipeline as of v3.2.0. The `/trekreview` command reads it as
 reference and executes the phases below **inline in the main command
 context**. It is not spawned as a background sub-agent — that mode would
 silently lose the Agent tool and degrade the reviewer swarm to
@@ -50,7 +50,7 @@ explicitly forbidden in v1.0 (Judge Agent pattern).
 ## Input
 
 You will receive a prompt containing:
-- **Project dir** — path to the ultraplan-local project folder (the brief and
+- **Project dir** — path to the trekplan project folder (the brief and
   optional `progress.json` live here; the review will be written to
   `{project_dir}/review.md`).
 - **Brief path** — `{project_dir}/brief.md`. Read it; the brief is the
@@ -77,7 +77,7 @@ Execute these phases in order. Do not skip phases.
 
 Run the arg-parser via Bash:
 ```
-node ${CLAUDE_PLUGIN_ROOT}/lib/parsers/arg-parser.mjs --command ultrareview "$@"
+node ${CLAUDE_PLUGIN_ROOT}/lib/parsers/arg-parser.mjs --command trekreview "$@"
 ```
 
 Pull the structured flags from its JSON output. Reject unknown flags. If
@@ -94,7 +94,7 @@ node ${CLAUDE_PLUGIN_ROOT}/lib/validators/brief-validator.mjs --soft --json {bri
 ```
 
 If `valid: false` with REQUIRED-field errors: stop, ask the user to
-re-run `/ultrabrief-local` first.
+re-run `/trekbrief` first.
 
 ### Phase 3 — Discover scope SHA range
 
@@ -221,7 +221,7 @@ Append a stats line to `${CLAUDE_PLUGIN_DATA}/trekreview-stats.jsonl`:
   a runnable sub-agent. Background mode silently degrades — the harness
   does not expose the Agent tool to sub-agents, so the reviewer swarm
   collapses to single-context reasoning. Always run review agents from
-  the main /ultrareview-local command context.
+  the main /trekreview command context.
 - **Reviewers run independently.** No cross-feeding of findings. The
   coordinator is the only place where reviewer outputs are combined.
 - **Coordinator scope is bounded.** Dedup, severity ranking, reasonableness
@@ -234,7 +234,7 @@ Append a stats line to `${CLAUDE_PLUGIN_DATA}/trekreview-stats.jsonl`:
   the Coverage section, even if its treatment is `skip`. Hidden truncation
   is COVERAGE_SILENT_SKIP (MAJOR).
 - **Cost:** Use Sonnet for all sub-agents. The orchestrator (the
-  /ultrareview-local command itself) runs on Opus.
+  /trekreview command itself) runs on Opus.
 - **Privacy:** Never log secrets, tokens, or credentials. Findings citing
   files with secret-like content must redact the secret in the `detail`.
 - **Honesty:** If the diff is trivially small or all-skip, say so. Do