fix(timeline): centralize preview-fetch abort in closePreview (closes #52)

Re-applies PR #52 (which had forked 77 commits behind master) onto current master: moves the in-flight preview abort out of selectBar's toggle-off path and into closePreview, so every close path (toggle-off, navigation, granularity/mode changes) aborts a pending preview fetch instead of only the toggle-off case. Rebuilds public/dist/main.js and gitignores server.log (the stray build-log this PR had accidentally committed).

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

Author: egeozcan

.gitignore

@@ -15,6 +15,7 @@
 /public/*.html
 /*.output.png
 /=file
+/server.log
 .aider*
 
 # E2E test artifacts

public/dist/main.js

@@ -280,11 +280,6 @@ export default function timeline({ apiUrl, entityType, defaultView }) {
         async selectBar(index, barType) {
             // Toggle off if clicking same bar
             if (this.selectedBar === index && this.selectedBarType === barType) {
-                // P3 fix: abort in-flight preview before closing
-                if (this._previewAborter) {
-                    this._previewAborter();
-                    this._previewAborter = null;
-                }
                 this.closePreview();
                 this.renderChart();
                 return;
@@ -372,6 +367,13 @@ export default function timeline({ apiUrl, entityType, defaultView }) {
         },
 
         closePreview() {
+            // Abort any in-flight preview fetch so a slow response can't land
+            // after the panel has been closed. Centralized here so every close
+            // path (toggle-off, navigation, granularity/mode changes) aborts.
+            if (this._previewAborter) {
+                this._previewAborter();
+                this._previewAborter = null;
+            }
             this.selectedBar = null;
             this.selectedBarType = null;
             this.previewHtml = '';