merge: integrate origin/main (v0.18.3.0) — community wave

Resolves conflicts:
- VERSION: kept 0.19.0.0 (feature branch, higher than main's 0.18.3.0)
- package.json: kept 0.19.0.0
- CHANGELOG.md: preserved 0.19.0.0 at top, inserted 0.18.3.0 between 0.19.0.0 and 0.18.2.0

Main brought community wave (6 PRs + hardening):
- Windows cookie import
- Persistent browse server across CLI invocations
- One-command OpenCode install
- OpenClaw skill frontmatter fixes
- Cookie picker UI resilience

Auto-merge applied to design.ts, design-consultation/SKILL.md.tmpl,
design-shotgun/SKILL.md.tmpl, and plan-design-review/SKILL.md.tmpl —
main's UX_PRINCIPLES changes and my TASTE_PROFILE resolver coexist cleanly.

Regenerated all SKILL.md files via gen:skill-docs and refreshed ship
golden fixtures. 423 tests pass.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

design-html/SKILL.md

@@ -632,7 +632,7 @@ around obstacles.
 _ROOT=$(git rev-parse --show-toplevel 2>/dev/null)
 D=""
 [ -n "$_ROOT" ] && [ -x "$_ROOT/.claude/skills/gstack/design/dist/design" ] && D="$_ROOT/.claude/skills/gstack/design/dist/design"
-[ -z "$D" ] && D=~/.claude/skills/gstack/design/dist/design
+[ -z "$D" ] && D="$HOME/.claude/skills/gstack/design/dist/design"
 if [ -x "$D" ]; then
   echo "DESIGN_READY: $D"
 else
@@ -640,7 +640,7 @@ else
 fi
 B=""
 [ -n "$_ROOT" ] && [ -x "$_ROOT/.claude/skills/gstack/browse/dist/browse" ] && B="$_ROOT/.claude/skills/gstack/browse/dist/browse"
-[ -z "$B" ] && B=~/.claude/skills/gstack/browse/dist/browse
+[ -z "$B" ] && B="$HOME/.claude/skills/gstack/browse/dist/browse"
 if [ -x "$B" ]; then
   echo "BROWSE_READY: $B"
 else