Add/transaction deletion (#695)

* feat(salary): add remove-employee button to draft salary runs

The DELETE /api/salary/runs/{id}/employees/{employeeId} endpoint already
existed (draft-only, cascades to the employee's line items) but had no UI
trigger, so a mistakenly added employee could only be cleared by deleting
the whole draft. Add a trash-icon action column to the "Anställda" table,
gated on draft status + write permission to match the endpoint's guard,
with a confirm prompt and success/error toast.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* fix(settings): prevent horizontal overflow on mobile

The company settings invite form was a non-wrapping fixed-width flex row that overflowed narrow viewports, forcing the full-screen settings modal to scroll on the x-axis. Stack the form vertically on mobile (sm:flex-row at and above the sm breakpoint) and add the missing min-w-0 guard to the modal content pane.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* feat(bookkeeping): move journal entry filters into a filter dialog

The ledger toolbar showed every filter inline (fiscal year, sort, series,
date range, missing-documents toggle), which felt cluttered. Keep only the
search field visible and move the rest into a "Filtrera" dialog with an
active-filter count badge.

- JournalEntryList now owns the fiscal-year scope, restored from the same
  localStorage key FiscalYearSelector writes, so the page no longer renders
  the selector separately.
- Filters apply live and the dialog stays open; "Rensa alla filter" clears them.
- Export STORAGE_KEY_PREFIX / ALL_YEARS_VALUE from FiscalYearSelector so the
  list reuses the persisted selection without duplicating the key.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* feat(transactions): implement imported transaction guard for deletion

- Added a guard to prevent deletion of transactions that are imported via bank sync or file uploads.
- Introduced `isImportedTransaction` utility to determine if a transaction is user-created or imported.
- Updated DELETE endpoint to return a 409 status for attempts to delete imported transactions.
- Enhanced transaction history and inbox components to reflect the new deletion rules.
- Added tests for transaction origin determination and deletion behavior.
- Updated UI components to include a confirmation dialog for clearing journal entry forms.
- Localized new strings for clearing form functionality in English and Swedish.

* feat(transactions): enhance transaction deletion guard and improve fiscal year visibility

---------

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

components/settings/SettingsShell.tsx

@@ -31,7 +31,7 @@ export function SettingsShell({ variant, activeSection, children }: SettingsShel
           <aside className="hidden w-56 shrink-0 overflow-y-auto border-r border-border p-3 md:block">
             <SettingsRail variant="modal" display="rail" activeId={activeSection} />
           </aside>
-          <div className="min-h-0 flex-1 overflow-y-auto p-6">
+          <div className="min-h-0 min-w-0 flex-1 overflow-y-auto p-6">
             <div className="mb-6 md:hidden">
               <SettingsRail variant="modal" display="select" activeId={activeSection} />
             </div>