feat: universal reorder grip handles and compact UI density

- Add generic move_in_order() to BaseRepository for reorder support
- Add reusable reorder_arrows.html partial with grip dot handles
- Add reorder routes to all 9 list routers (tasks, notes, links, contacts, meetings, decisions, appointments, lists, focus)
- Compact row padding (6px 12px, gap 8px) on .list-row and .focus-item
- Reduce font size to 0.80rem on row titles, sidebar nav, domain tree

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

routers/focus.py

@@ -121,6 +121,20 @@ async def add_to_focus(
     return RedirectResponse(url=f"/focus?focus_date={focus_date}", status_code=303)
 
 
+@router.post("/reorder")
+async def reorder_focus(
+    request: Request,
+    item_id: str = Form(...),
+    direction: str = Form(...),
+    focus_date: str = Form(...),
+    db: AsyncSession = Depends(get_db),
+):
+    repo = BaseRepository("daily_focus", db)
+    parsed_date = date.fromisoformat(focus_date)
+    await repo.move_in_order(item_id, direction, filters={"focus_date": parsed_date})
+    return RedirectResponse(url=f"/focus?focus_date={focus_date}", status_code=303)
+
+
 @router.post("/{focus_id}/toggle")
 async def toggle_focus(focus_id: str, request: Request, db: AsyncSession = Depends(get_db)):
     repo = BaseRepository("daily_focus", db)