The inline editor commits by record identity, not viewport position (improvise-2wu3)

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VdfEGXA7aJ6ftMsCc9PJze

web/app.js

@@ -541,6 +541,10 @@ function gridTable(model) {
  *  back is the server's, never the string typed here. */
 function edit(td, row, col, seed) {
   if (editing) return;
+  // WHICH cell, captured now: rows renumber while the editor is open, so the
+  // position is not an address by commit time (improvise-2wu3).
+  const target = client.edit_target(row, col);
+  if (!target) return;
   // `seed` is `RenderCell::edit_text` -- the STORED value, not the drawn one:
   // `td.textContent` has been through the number format.
   const original = seed;
@@ -563,9 +567,9 @@ function edit(td, row, col, seed) {
     closed = true;
     editing = null;
     if (commit) {
-      const frame = client.typed_cell(row, col, input.value);
-      // null only if the grid moved under the editor; the repaint that
-      // follows restores whatever the server now says is there.
+      const frame = client.typed_cell(target, input.value);
+      // null only before any basis arrived; the repaint that follows
+      // restores whatever the server now says is there.
       if (frame) transport.send(frame);
     }
     td.replaceChildren(drawn);