Adds proper /identities and /campaigns list pages following the
Bounty/Attackers convention (page-header + page-title-group +
controls-row + logs-section + logs-table + EmptyState). Both pages
live-update via the existing identity / campaign SSE streams.
Sidebar: Attackers, Identities, Campaigns now group under a
THREAT DATA NavGroup, matching the SWARM grouping pattern.
CampaignDetail and IdentityDetail rewritten to use the house class
system (page-header / logs-section / chip / dim-chip) instead of
inline styles. The campaign chip on IdentityDetail navigates to
/campaigns/:uuid; both pages share a small fp-group helper for
fingerprint listings (added to Dashboard.css).
API: /api/v1/campaigns (paginated list), /api/v1/campaigns/{uuid}
(soft-merge chain follow), /api/v1/campaigns/{uuid}/identities
(member identities), and /api/v1/campaigns/events (SSE under
campaign.> + JWT-via-?token=, snapshot-on-connect). Mirror of the
identity router; same auth, same shape, same OpenAPI tags pattern.
Frontend: CampaignDetail.tsx page (same visual vocabulary as
IdentityDetail), useCampaignStream hook (mirror of
useIdentityStream), /campaigns/:id route, IdentityDetail's
CAMPAIGN badge becomes clickable and navigates to the campaign.
useIdentityStream now listens for identity.campaign.assigned so
the badge appears live without a manual refresh.
