chore: the gap list is current again, and the check is clean

The Navigator was still listed as missing; only split view is. Formula
recalculation stops the walk at the blocks a table cannot be in, or it
visits every run of the document per keystroke. One dead CSS rule goes,
so svelte-check reports nothing at all.

src/App.svelte

@@ -1671,12 +1671,6 @@
     transform: none;
   }
 
-  .action-separator {
-    width: 1px;
-    height: 1.5rem;
-    background: var(--color-border);
-  }
-
   .file-action-btn {
     display: inline-flex;
     align-items: center;

src/lib/editor/extensions/tableFormula.ts

@@ -107,6 +107,9 @@ type Edit = { pos: number; cell: PMNode; text: string };
 function formulaEdits(doc: PMNode, loc: NumberLocale): Edit[] {
   const edits: Edit[] = [];
   doc.descendants((node, pos) => {
+    // This runs on every edit, so the walk stops at the blocks a table cannot be in —
+    // otherwise it visits every run of the document per keystroke.
+    if (node.isTextblock) return false;
     if (node.type.name !== 'table') return;
     for (const [off, text] of evaluateTable(node, loc, t().table.formulaError)) {
       const cell = node.nodeAt(off);