From c8b401f5638e6fdc2e80c63173be4266a27d7eea Mon Sep 17 00:00:00 2001
From: Michael B Reiser <mreiser@gmail.com>
Date: Mon, 1 Jun 2026 09:27:43 -0400
Subject: [PATCH] fix(v3): clear dirty flag when undo returns to a saved state
 (v0.19)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The undo/redo snapshots captured text + selection but not the `dirty` flag, so
undoing the only edit left "● edited" showing even though the document matched
what was loaded. Snapshot `dirty` too (pushUndo captures pre-mutation state, so
the snapshot records the correct pre-edit value) and restore it in
restoreSnapshot. Undo back to the loaded state now clears the indicator; redo
re-asserts it; undoing one of several edits keeps it (edits remain).

Footer v0.18 → v0.19. npm test green (arena 10 · v2 137 · v3 576);
browser-verified the load/edit/undo/redo/partial-undo indicator states.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
---
 experiment_designer_v3.html | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/experiment_designer_v3.html b/experiment_designer_v3.html
index b327de0..cfb16c4 100644
--- a/experiment_designer_v3.html
+++ b/experiment_designer_v3.html
@@ -1332,7 +1332,7 @@ <h1>v3 Experiment Designer</h1>
     <!-- Footer -->
     <div class="app-footer">
         <a href="https://github.com/reiserlab/webDisplayTools" target="_blank">Reiser Lab</a> |
-        v3 Experiment Designer v0.18 | <span id="footerTimestamp">2026-06-01 09:10 ET</span>
+        v3 Experiment Designer v0.19 | <span id="footerTimestamp">2026-06-01 09:26 ET</span>
     </div>
 
     <!-- Error modal -->
@@ -1457,7 +1457,11 @@ <h2 id="modalTitle">Import error</h2>
             if (!experiment || !experiment._doc) return null;
             return {
                 text: experiment._doc.toString(),
-                selection: selection ? JSON.parse(JSON.stringify(selection)) : null
+                selection: selection ? JSON.parse(JSON.stringify(selection)) : null,
+                // Capture the dirty flag too, so undoing back to the loaded state
+                // clears "● edited" (and redo re-asserts it). pushUndo snapshots
+                // BEFORE the mutation, so this records the pre-edit dirty value.
+                dirty: dirty
             };
         }
 
@@ -1479,6 +1483,7 @@ <h2 id="modalTitle">Import error</h2>
             try {
                 experiment = parseV3Protocol(snap.text);
                 selection = snap.selection;
+                setDirty(!!snap.dirty);
                 renderAll();
             } catch (err) {
                 showError('Undo/redo restore failed', err.message);