debug(plugin): add console logging to svrnty_nav.js to diagnose silent injection failure

static/svrnty_nav.js

@@ -11,6 +11,9 @@
   "use strict";
   if (window.__svrntyNavLoaded) return;
   window.__svrntyNavLoaded = true;
+  const LOG = (...a) => console.log("[svrnty-nav]", ...a);
+  const ERR = (...a) => console.error("[svrnty-nav]", ...a);
+  LOG("loaded", { readyState: document.readyState });
 
   const TABS = [
     {
@@ -31,9 +34,14 @@
 
   function _injectButtons() {
     const nav = document.querySelector(".sidebar-nav");
-    if (!nav) return false;
+    if (!nav) {
+      LOG("_injectButtons: .sidebar-nav not found yet");
+      return false;
+    }
+    let added = 0;
     TABS.forEach((t) => {
       if (nav.querySelector('[data-panel="' + t.id + '"]')) return;
+      try {
         const btn = document.createElement("button");
         btn.className = "nav-tab has-tooltip has-tooltip--bottom svrnty-nav-tab";
         btn.setAttribute("data-panel", t.id);
@@ -42,12 +50,20 @@
         btn.setAttribute("aria-label", t.label);
         btn.innerHTML = t.svg;
         btn.addEventListener("click", () => {
+          LOG("button clicked:", t.id);
           if (typeof window.switchPanel === "function") {
             window.switchPanel(t.id, { fromRailClick: true });
+          } else {
+            ERR("switchPanel is not a function — cannot route click");
           }
         });
         nav.appendChild(btn);
+        added++;
+      } catch (e) {
+        ERR("failed to inject button", t.id, e);
+      }
     });
+    LOG("_injectButtons: added", added, "of", TABS.length, "(nav children:", nav.children.length, ")");
     return true;
   }
 
@@ -81,13 +97,20 @@
     return true;
   }
 
+  let _initAttempts = 0;
   function _init() {
+    _initAttempts++;
     const buttonsOk = _injectButtons();
     const wrapOk = _wrapSwitchPanel();
     if (!buttonsOk || !wrapOk) {
-      // DOM not ready yet — retry on next paint
+      if (_initAttempts < 100) {
         requestAnimationFrame(_init);
+      } else {
+        ERR("_init gave up after", _initAttempts, "attempts. buttonsOk=", buttonsOk, "wrapOk=", wrapOk);
       }
+      return;
+    }
+    LOG("_init completed in", _initAttempts, "attempt(s)");
   }
 
   if (document.readyState === "loading") {