Loki Mode v7.84.0

Enterprise-grade dashboard overhaul

A ground-up restructure + polish of the dashboard so it looks and feels like a
tool teams already trust. The previous layout had two redundant project dropdowns,
several blank views (Quality, Analytics, Trust, Wiki), an over-long unpruned
project list, a leftover developer API-URL control, and a task board that lost its
column headers on scroll. All fixed, plus a full information-architecture pass.

• Navigation restructured: the 16 flat items are grouped into clear sections
  (Build, Quality & Trust, Insights, Ops, Wiki) with a redesigned top bar. Every
  deep link / section id is preserved.
• One project switcher: the two stacked dropdowns are collapsed into a single
  switcher; the project list is now pruned (dead paths removed) so it stays short
  and relevant instead of accumulating every directory ever opened.
• No more blank views: Quality, Analytics, Trust, and Wiki now render polished,
  branded empty states with a clear next action (Run quality scan, Start a build,
  generate the wiki) instead of an empty panel. Quality shows all eight gates.
• Task board keeps its column headers pinned while cards scroll, and the sidebar
  scrolls cleanly without cutting off.
• The leftover developer API-URL input is no longer in the always-visible footer
  (moved behind a settings affordance); theme + settings live in a tidy footer.
• Consistent enterprise design pass (spacing, density, cards, light + dark) using
  the shared design tokens.

Verified with a Playwright screenshot pass across every view in light and dark.
A standalone, offline-browseable build ships in artifacts/dashboard-preview/.