fix: use STATE_DIR instead of hardcoded ~/.openclaw for identity and canvas (#4824)

* fix: use STATE_DIR instead of hardcoded ~/.openclaw for identity and canvas

device-identity.ts and canvas-host/server.ts used hardcoded
path.join(os.homedir(), '.openclaw', ...) ignoring OPENCLAW_STATE_DIR
env var and the resolveStateDir() logic from config/paths.ts.

This caused ~/.openclaw/identity and ~/.openclaw/canvas directories
to be created even when state dir was overridden or resided elsewhere.

* fix: format and remove duplicate imports

* fix: scope state-dir patch + add regression tests (#4824) (thanks @kossoy)

* fix: align state-dir fallbacks in hooks and agent paths (#4824) (thanks @kossoy)

---------

Co-authored-by: Gustavo Madeira Santana <gumadeiras@gmail.com>

CHANGELOG.md

@@ -15,6 +15,7 @@ Docs: https://docs.openclaw.ai
 - Memory: set Voyage embeddings `input_type` for improved retrieval. (#10818) Thanks @mcinteerj.
 - Memory/QMD: run boot refresh in background by default, add configurable QMD maintenance timeouts, and retry QMD after fallback failures. (#9690, #9705)
 - Media understanding: recognize `.caf` audio attachments for transcription. (#10982) Thanks @succ985.
+- State dir: honor `OPENCLAW_STATE_DIR` for default device identity and canvas storage paths. (#4824) Thanks @kossoy.
 - Tests: harden flaky hotspots by removing timer sleeps, consolidating onboarding provider-auth coverage, and improving memory test realism. (#11598) Thanks @gumadeiras.
 
 ## 2026.2.6