v2.2-paseo-providers: Paseo provider stack + v2.2.1 pane-scoped chat fixes

Ship Paseo-equivalent provider snapshot, AgentComposerBar, ACP dispatch
rewrite with streaming/persist, permission prompts, and agent commands.
Follow-up: pane-scoped chat resolution, CoderMessageList tool timeline,
WS user-delta replace, and inference orphan tool_call stripping.
Archive openspec v2-2; update CHANGELOG and CURRENT.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/server/src/services/skills.ts

@@ -16,7 +16,7 @@ import { pathGuard, PathScopeError } from './path_guard.js';
 // new skills, per-entry mtime check on body access so a hot-edited SKILL.md
 // is re-read without a restart. No watcher.
 
-const SKILLS_ROOT = '/data/skills';
+const SKILLS_ROOT = process.env.SKILLS_ROOT ?? '/data/skills';
 const MAX_RESOURCE_BYTES = 5 * 1024 * 1024;
 const LIST_CACHE_TTL_MS = 60_000;