fix(a11y): chips, grips, the panel tab and Back to top keep the focus somewhere real

- F5: a chip's × pressed from the keyboard hands the focus to the next chip (else the previous one,
  else what follows) before it unmounts — in DismissibleChip, so all five chip rows get it
  (`focusNeighbour` in lib/useFocusKeeper).
- F4: a drag grip names what it lifts (`common.order.dragNamed`: panel groups, personal views);
  the two generic "Drag to reorder" keys are gone.
- F6: the side panel's edge tab is out of the Tab order while the card covers it, names its panel,
  and a keyboard pin moves the focus into the card.
- F7: Back to top is no Tab stop while hidden, and a keyboard press leaves the focus on the page.

frontend/src/components/PersonalViewsModal.tsx

@@ -62,7 +62,11 @@ function ViewRow({
         selected ? "bg-accent/15" : "state-layer"
       }`}
     >
-      <DragHandle label={t("views.reorder")} {...attributes} {...listeners} />
+      <DragHandle
+        label={t("common.order.dragNamed", { name: view.name })}
+        {...attributes}
+        {...listeners}
+      />
       <Pressable
         selectable
         onClick={onSelect}