fix(view): follow the keyboard through the navbar hiding behind it

Same two misses as the calendar's: the four-frame watch stopped before
Obsidian hid its navbar - a second move of the ground, after the keyboard's
own - and a trigger that arrived while a watch was running was dropped rather
than restarting it. The watch now needs twelve steady frames, restarts on
every trigger, and listens to Obsidian's Capacitor keyboard events too.

src/view.ts

@@ -13,9 +13,18 @@ export const VIEW_TYPE_PANEL = "beaver-panel";
 // sits under every view, including the one filling the screen.
 const BOTTOM_BARS = [".status-bar", ".mobile-navbar", ".mobile-toolbar"];
 
-// The keyboard and the navbar both animate. Rather than guess how long that
+// The keyboard and the navbar both animate, and Obsidian hides the navbar
-// takes, the inset is re-measured every frame until the reading holds still.
+// *after* the keyboard is up: the inset is re-measured every frame until the
-const STEADY_FRAMES = 4;
+// reading has held still long enough to outlast both moves.
+const STEADY_FRAMES = 12;
+
+/** Obsidian's Capacitor keyboard events on mobile; absent on the desktop. */
+const KEYBOARD_EVENTS = [
+  "keyboardWillShow",
+  "keyboardDidShow",
+  "keyboardWillHide",
+  "keyboardDidHide",
+] as const;
 
 interface SavedState {
   follow?: unknown;
@@ -106,6 +115,14 @@ export class PanelView extends ItemView {
     // out the navbar comes back, so the leaf has to be re-measured after.
     this.registerDomEvent(this.contentEl, "focusin", () => this.settle());
     this.registerDomEvent(this.contentEl, "focusout", () => this.settle());
+    // Obsidian's own keyboard events (Capacitor, mobile only) fire before the
+    // animation and again as the navbar returns, which visualViewport alone
+    // does not always report.
+    for (const name of KEYBOARD_EVENTS) {
+      const onKeyboard = () => this.settle();
+      window.addEventListener(name, onKeyboard);
+      this.register(() => window.removeEventListener(name, onKeyboard));
+    }
     this.follow(this.app.workspace.getActiveFile());
     this.plugin.views.add(this);
     this.mountApp();
@@ -121,11 +138,13 @@ export class PanelView extends ItemView {
    * which is the case in a sidedock drawer.
    */
   private settle(): void {
-    if (this.settling !== null) {
-      return;
-    }
     let last = Number.NaN;
     let steady = 0;
+    // A fresh trigger restarts the watch rather than being dropped: the navbar
+    // coming back is a second move, after the first one has settled.
+    if (this.settling !== null) {
+      cancelAnimationFrame(this.settling);
+    }
     const tick = () => {
       const floor = this.inset();
       steady = floor === last ? steady + 1 : 0;