tesks-ui: Home/Issues screen — list+board DnD, persisted ordering, configurable status order, header density

Home (Issues) list + board view overhaul. The big interactive features of the whole overhaul live here.

Density / header

• Move the "Issues / 83 issues in team" count up into the top bar (next to the dark/light toggle) to reclaim vertical space — on both list and board.
• Search bar + filter dropdown look ugly — restyle using the shared search/select primitives (see Navbar issue foundations).
• Board buttons (board/list toggle) should look obviously interactable.

Ordering (feature)

• Status group order should be configurable in user settings; default order: Triage → In Progress → Backlog → Pending Release → Done.
• Issues list supports arbitrary manual ordering that persists (store a relative weight per issue) — a meta-level priority layer.
• Drag issues in the list between states (drag = both reorder within a state and move across states), calling the existing update path + new weight persistence.
• Kanban board: drag cards between states too (PAR-66 added the board; this adds DnD).
• Kanban board should not be max-width — the gutters cut it off; let it use full width and host the project-context/count in the top bar to free vertical space.

Visual consistency

• In the issue row, the upvote score should come before the assignee (most issues are assigned).

Needs a small schema/weight-persistence change (DAL lib/sql/issues.ts + action) and a DnD approach (no dnd lib present yet — evaluate hand-rolled vs adding one). Commit to develop, ref this issue.