fix(ui): make row selection checkboxes always visible at muted opacity (#2093)

* fix(ui): make row selection checkboxes always visible at muted opacity

User feedback: bulk-select checkboxes hidden until hover are "sjukt
pilligt": an invisible 16px target forces a precise hover-then-aim per
row, and bulk selection is a primary workflow on list pages.

New CHECKBOX_REVEAL_CLASS in dry-table.tsx: rest at opacity-50, solid on
row hover, focus, coarse pointers, and checked state. Applied to the 8
selection-checkbox sites (transaction inbox, skattekonto inbox, journal
list, invoices, supplier invoices, orders, pending, invoice inbox
workspace). Also fixes a touch bug: TransactionInboxCard and
SkattekontoInboxCard lacked pointer-coarse fallback, leaving unselected
checkboxes permanently invisible on touch devices.

Row action controls (chevrons, quiet links) keep HOVER_REVEAL_CLASS.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015n8vUx9Nukr8mHC7CVNF7y

* fix(ui): meet WCAG 3:1 on resting selection checkboxes via border-foreground

Skeptic finding: the checkbox primitive's border-input is ~1.4:1 against
the page, so the new opacity-50 resting state composited to ~1.2:1,
under the 3:1 non-text contrast minimum design.md commits to. Putting
border-foreground unconditionally on the 8 reveal checkboxes lands the
resting border at >=3.4:1 in every theme (light 3.41:1, dark 4.24:1,
white-label palettes similar) and the hover/solid state at ~17:1.

The border class lives at call sites, not in CHECKBOX_REVEAL_CLASS,
because the constant is sometimes applied to a borderless wrapper
(InvoiceInboxWorkspace); documented in dry-table.tsx.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015n8vUx9Nukr8mHC7CVNF7y

---------

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

components/bookkeeping/JournalEntryList.tsx

@@ -40,6 +40,7 @@ import {
   VTH_CLASS,
   VTD_CLASS,
   QUIET_LINK_CLASS,
+  CHECKBOX_REVEAL_CLASS,
   RowFoldout,
 } from '@/components/ui/dry-table'
 import { ArrowDown, ArrowUp, ArrowUpDown, ChevronRight, ChevronLeft, ChevronsLeft, ChevronsRight, Copy, Paperclip, CircleSlash, Loader2, BookOpen, X, Lock, Search, SlidersHorizontal, RotateCcw } from 'lucide-react'
@@ -1545,10 +1546,10 @@ export default function JournalEntryList({
                             onCheckedChange={() => toggleSelect(entry.id)}
                             aria-label={t('batch_select_row')}
                             className={cn(
-                              'transition-opacity duration-150',
+                              'border-foreground duration-150',
                               selectedIds.has(entry.id)
                                 ? 'opacity-100'
-                                : 'opacity-0 group-hover:opacity-100 focus-visible:opacity-100',
+                                : CHECKBOX_REVEAL_CLASS,
                             )}
                           />
                         )}