Upgrade heatmaps stile Hotjar: movimenti mouse e anteprima pagina live.

Traccia i movimenti aggregati, overlay a gradienti sull’iframe della pagina e toggle click/move in admin.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/config/locales/admin.en.yml

@@ -360,14 +360,18 @@ en:
         any: All
         apply: Filter
         reset: Reset
+        layer: Layer
+        layer_move: Mouse moves
+        layer_click: Clicks
       index:
         title: Site analytics
-        lead: Aggregated first-party heatmaps and scroll depth, only with analytics consent. No personal data.
+        lead: Aggregated first-party move/click heatmaps and scroll depth, only with analytics consent. No personal data.
         none: No data in the selected period.
         heatmap: Heatmap
         table:
           path: Page
           pageviews: Pageviews
+          moves: Moves
           clicks: Clicks
           avg_scroll: Avg scroll
           max_scroll: Max scroll
@@ -377,6 +381,12 @@ en:
         summary: Summary
         scroll_depth: Scroll depth
         scroll_hint: "Average %{avg}% · max %{max}%"
+        heatmap_moves: Mouse-move map
+        heatmap_clicks: Click map
+        heatmap_hint: Colored overlay on the live page (current layout). Green = low, red = high.
+        preview_title: Page preview
+        preview_unavailable: Preview unavailable for paths with placeholders (e.g. /clubs/:id). Overlay only.
+        no_points: No aggregated points for this layer in the period.
         heatmap_title: Click map
         no_clicks: No aggregated clicks for this page in the period.