chore(plan): break T-476 down into 6 children under an epic
Convert T-476 from story to epic and file the implementation slices:
T-477 storage/registry/migration, T-478 spawn-time CLAUDE_CONFIG_DIR
injection, T-479 multi-dir /ide lock writer, T-480 clide CLI verbs
(D-6 parity), T-481 pane badge + welcome accounts UI, T-482 settings
rows. Blocker graph wired (T-356 -> T-477 -> fan-out -> T-480 -> UI).
Epic body refined with the proven mechanism, surveyed alternatives,
concrete code touchpoints, and acceptance.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
