fix: pre-landing review fixes (27 specialist findings, 3 critical)

Specialist army findings, all quote-verified before fixing:

Security: careful force-push guard now catches git's plus-refspec force
syntax (git push origin +main carried force with no flag — silently allowed
before) and refspec-form targets (HEAD:main); default-branch matching is
tokenized FIXED-STRING comparison on the full branch path (slashed defaults
like release/2.0 work; no ERE interpolation), glob-safe via noglob. HIGH rm
tier is tokenized too: trailing long options (--no-preserve-root) and /* are
root-class. Stored evidence fingerprints are 40-hex re-validated before
reaching git argv. normalizeForDetection sweeps ALL Unicode format chars
(\p{Cf}: soft hyphens, bidi marks, tag chars) instead of five enumerated
zero-widths. The wiring scanner gains flagless gh pr/issue view patterns. The
release-body banner tripwire diffs against the fetched original so a hostile
pre-existing banner string can't permanently DoS doc updates. Ship/land
evidence checks now pass --expect-cmd (a green `echo ok` recorded under the
label can never mint FRESH); package.json stays allow-listed with the
residual documented.

Performance: gstack-wtree seeds its temp index by COPYING the real index
(stat cache preserved — measured 40x faster than read-tree seeding, identical
hash) with read-tree fallback; evidence uses findLast and one gstack-slug
spawn; the stream pump honors backpressure via drain; careful's pattern block
short-circuits before slug resolution when no pattern file exists.

Testing: the gh-failure envelope test was VACUOUS (killing PATH killed the
bun shebang before the code under test ran) — replaced with a PATH gh shim
that exercises the real branch, plus shimmed happy paths (issue/pr-body/
unparseable JSON); evidence check --all + empty ledger + non-numeric
--max-age (now a usage error, was silent fail-open) covered; HIGH-tier
variants pinned; hook analytics respect GSTACK_HOME so tests stop writing the
operator's real skill-usage.jsonl.

Maintainability: dead exit ternary removed; flagValue deduped into
bin-context; sentinel defusal derived from the banner constants (no invisible
literals — \u escapes only); scratch-repo git fixture extracted to
test/helpers/scratch-repo.ts (one hermetic incantation, three consumers);
shared gstack_hook_log_fire in hook-extract.sh; the dashboard/land diff-scoped
row lists are aligned (codex-review) and drift-pinned.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

test/binding-template-drift.test.ts

@@ -20,7 +20,7 @@ function rendered(rel: string): string {
 describe('content-binding template drift', () => {
   test('ship Step 16 carries the evidence check (mechanized IRON LAW)', () => {
     const ship = rendered('ship/SKILL.md');
-    expect(ship).toContain('gstack-evidence check --label tests --label vitest --max-age 24 --allow-paths CHANGELOG.md,VERSION,package.json');
+    expect(ship).toMatch(/gstack-evidence check --label tests --expect-cmd '[^']+' --label vitest --expect-cmd '[^']+' --max-age 24 --allow-paths CHANGELOG\.md,VERSION,package\.json/);
     expect(ship).toContain('a failed CHECK never blocks');
   });
 
@@ -34,7 +34,7 @@ describe('content-binding template drift', () => {
     const land = rendered('land-and-deploy/SKILL.md');
     expect(land).toContain('wtree');
     expect(land).toContain('---WTREE---');
-    expect(land).toContain('gstack-evidence check --label tests --max-age 24');
+    expect(land).toMatch(/gstack-evidence check --label tests --expect-cmd '[^']+' --max-age 24/);
     expect(land).toContain('UNKNOWN');
   });
 
@@ -47,9 +47,20 @@ describe('content-binding template drift', () => {
     expect(ship).toContain('grade UNKNOWN and treat as stale');
   });
 
+  test('the diff-scoped row list is IDENTICAL in both grading surfaces (no drift)', () => {
+    // The resolver (dashboard) and land-and-deploy each carry the row list;
+    // they diverged once (codex-review present in one, missing in the other).
+    // Rendered dashboards escape backticks (template-literal origin), so match
+    // structurally: the three row names in order inside the rule sentence.
+    const rowList = /diff-scoped rows only:[\s\S]{0,80}?adversarial-review[\s\S]{0,80}?codex-review[\s\S]{0,80}?ship-stage entries/;
+    expect(rendered('ship/SKILL.md')).toMatch(rowList);
+    expect(rendered('land-and-deploy/SKILL.md')).toMatch(rowList);
+  });
+
   test('release-body write side carries the banner tripwire', () => {
     const body = rendered('document-release/sections/release-body.md');
-    expect(body).toContain('grep -q "UNTRUSTED TRACKER CONTENT" /tmp/gstack-pr-body-$$.md');
+    expect(body).toContain('grep -c "UNTRUSTED TRACKER CONTENT" /tmp/gstack-pr-body-$$.md');
+    expect(body).toContain('grep -c "UNTRUSTED TRACKER CONTENT" /tmp/gstack-pr-body-orig-$$.md');
     expect(body).toContain('banner tripwire clean');
   });