fix(add-clidash): mkdir -p tools in install step; require Node >=22.5

Address review feedback on PR #2795:
- SKILL.md Step 1 now creates tools/ before cp -R (cp does not create
  intermediate parents; tools/ is not a standard NanoClaw dir, so the copy
  failed on a fresh checkout).
- package.json engines bumped to >=22.5 — server.js statically imports
  activity.js -> node:sqlite (DatabaseSync), which lands in Node 22.5, so
  the server crashed at module load on Node 20/21 LTS.
- Doc references (SKILL.md, README.md) updated to Node >=22.5 for consistency.

Verified 87/87 tests pass on Node 22.14.

.claude/skills/add-clidash/SKILL.md

@@ -41,7 +41,11 @@ build step, no push pipeline, and no edits to NanoClaw source — it just reads
 
 clidash is fully self-contained — copy the whole directory in:
 
+`tools/` is not a standard NanoClaw directory and `cp -R` won't create it, so
+make it first:
+
 ```bash
+mkdir -p tools
 cp -R .claude/skills/add-clidash/add/tools/clidash tools/clidash
 ```
 
@@ -76,7 +80,7 @@ Tests use a stub CLI — no real `ncl` or `docker` needed:
 npm test
 ```
 
-All tests should pass (Node ≥ 20, `node:test`, zero dependencies).
+All tests should pass (Node ≥ 22.5, `node:test`, zero dependencies).
 
 ### 4. Run and verify
 

.claude/skills/add-clidash/add/tools/clidash/README.md

@@ -9,7 +9,8 @@ It ships pre-wired for NanoClaw's `ncl` CLI (agent groups, sessions, messaging
 groups, wirings, users, roles, …) plus `docker`, but the same config shape
 works for any list-as-JSON CLI.
 
-- **Zero dependencies** — Node built-ins only (Node ≥ 20), no build step,
+- **Zero dependencies** — Node built-ins only (Node ≥ 22.5, for `node:sqlite`),
+  no build step,
   vanilla-JS frontend.
 - **Read-only by construction** — the server can only `execFile` the configured
   argv templates; `{resource}` is the sole substitution and is validated

.claude/skills/add-clidash/add/tools/clidash/package.json

@@ -9,6 +9,6 @@
     "test": "node --test 'test/*.test.js'"
   },
   "engines": {
-    "node": ">=20"
+    "node": ">=22.5"
   }
 }