fix(ux): collapse mode-section by default — task-tiles is now primary entry

User reported: '14 modes appeared in two places' (in task-tiles AND in mode-section
tab strip below). After wrapMainSectionsAsFoldable() runs at startup, explicitly
set the mode-section <details> to open=false so the legacy 14-tab strip is
collapsed by default. Power users can still expand it with one click.

This makes task-tiles the unambiguous primary entry point (5 tiles by intent),
with the full 14-mode strip as opt-in backup.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

js/main.js

@@ -181,6 +181,12 @@ function wrapMainSectionsAsFoldable() {
 }
 wrapMainSectionsAsFoldable();
 
+// v0.7.7 — task-tiles is the primary entry point; collapse the legacy 14-tab
+// strip by default so users don't see duplicated navigation. Power users can
+// still expand it with one click.
+const __modeDetails = document.querySelector("#mode-section > details.main-panel");
+if (__modeDetails) __modeDetails.open = false;
+
 // ════════════════════════════════════════════════════════════════════
 // Mode toggle
 // ════════════════════════════════════════════════════════════════════