Merge origin/main (v1.60.1.0) into garrytan/gstack-fix-wave

Semantic reconciliation with the parallel time-attack wave (#2264):
- careful: adopt main's anchored full-command whitelist (stricter — also
  catches comment-hiding), re-apply this wave's two hardenings on top
  (capital -[rR] in the flag cluster; exclude `(` and backtick from safe
  targets so $()/backtick substitution cannot ride the whitelist). Union
  of both waves' test batteries passes (main's test.each incl. comment
  case + this wave's substitution/capital-R/FP-pin cases).
- one-way-doors: main landed the singular noun unification (a2a447a1);
  keep this wave's superset (plural s? + --summary-stdin runtime wiring).
- gbrain-local-status: union of states — main's engine-locked (#2194,
  exit 124 PGLite lock) + this wave's thin-client (#2051). --is-ok keeps
  main's intent (engine-locked = STOP) and this wave's (thin-client =
  usable). Test harness unions both fake behaviors.
- sync-gbrain/setup-gbrain tmpls: both Step 1.5 branches kept; generated
  SKILL.md resolved via bun run gen:skill-docs (never hand-edited).
- VERSION/package.json -> 1.61.0.0 per bin/gstack-next-version (main took
  1.60.1.0; PR #2470 claims 1.60.2.0). CHANGELOG: wave entry renumbered
  1.61.0.0 on top of main's 1.60.1.0; careful/#2024 bullets updated to
  describe the delta vs current main. TODOS: union.

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

package.json

@@ -1,6 +1,6 @@
 {
   "name": "gstack",
-  "version": "1.60.0.0",
+  "version": "1.61.0.0",
   "description": "Garry's Stack — Claude Code skills + fast headless browser. One repo, one install, entire AI engineering workflow.",
   "license": "MIT",
   "type": "module",
@@ -76,5 +76,8 @@
     "@anthropic-ai/sdk": "^0.78.0",
     "xterm": "5",
     "xterm-addon-fit": "^0.8.0"
+  },
+  "overrides": {
+    "basic-ftp": "5.3.1"
   }
 }