feat(ui): pattern modes, bundles, and zone content kind

Add profile/preset/sequence JSON import and export; map preset mode to
wire n6 with a mode dropdown for multi-mode patterns; zone edit shows
presets or sequences only with content_kind on save; update catalogue
and tests for merged pattern names.

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

src/static/patterns.js

@@ -573,7 +573,12 @@ document.addEventListener('DOMContentLoaded', () => {
             n3: coercePresetInt(preset.n3),
             n4: coercePresetInt(preset.n4),
             n5: coercePresetInt(preset.n5),
-            n6: coercePresetInt(preset.n6),
+            n6: (() => {
+              if (preset.mode !== undefined && preset.mode !== null && preset.mode !== '') {
+                return coercePresetInt(preset.mode);
+              }
+              return coercePresetInt(preset.n6);
+            })(),
           };
         });
         if (!Object.keys(wirePresets).length) {