Add a new P3RM1SS10NS tab to the dashboard that consolidates all
per-agent permission configuration:
Backend:
- GET /api/capabilities returns { caps: [...], assignments: {...} }
driven by Capability::ALL variants (manage_root_agent,
read_host_journal, query_agent_state)
- POST /api/capabilities/{agent} writes capabilities.json and queues
a rebuild so HIVE_CAPABILITIES takes effect
Frontend:
- New 'permissions' entry in TABS, placed after 'system'
- P3RM1SS10NS tab pane with two sections:
C4P4B1L1T13S — agents × capabilities checkbox matrix (.cap-*)
T00L GR0UPS — agents × tool-groups checkbox matrix (.tg-*) moved
from SYST3M tab
- activateTab('permissions') fetches both tables; neither has an SSE
channel so they re-fetch on each activation to stay fresh
- CSS for .cap-* mirrors the .tg-* layout (scrollable, Catppuccin)
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