fix(dashboard): refresh after manual sync failure

[pitimon]

Summary

• isolate local sync failure handling inside manual refresh
• continue refreshing every dashboard panel after sync failure
• keep manual usage-limits refresh forced while scheduled refresh remains cache-aware
• log sync failure separately from downstream refresh failure

Verification

• strict RED: sync rejection cancelled all panel refreshes before the fix
• GREEN: all refresh hooks run once after sync rejection, including forced usage limits
• successful sync and scheduled interval/post-sync semantics remain covered
• focused dashboard tests: 15/15 pass
• independent review: PASS, no findings
• post-rebase npm run ci:local: dashboard 321/321, root 1037/1037, all validators green
• changed-file ESLint and static scan pass

Closes #146