feat(readmymind): alternates row, phone accessory key, phone-sized modal (phase 3 part 1)

The Read My Mind modal grows up and reaches phones:

- Alternate suggestions (the predictor's verify/redirect kinds) now render
  as tappable rows below the main field. Tapping one swaps it into the
  editable field; the edit you were making folds back into the row you
  leave, so toggling between alternates never loses typing. Rethink now
  records the WHOLE shown set (main + alternates) as rejected.
- Phones get a 🧠 key on the keyboard accessory bar (both simple and
  extended layouts), gated on the same synced readMyMindEnabled setting
  via an rmm-enabled marker class on the BAR element: setMode() rebuilds
  the buttons' innerHTML, so per-key state would be wiped. Synced at init
  and re-synced by applyHeaderVisibilitySettings() on every settings
  apply, so a live toggle needs no reload. The header button stays off
  phones.
- On phones the modal renders as a small dialog (mirrors modal-sm) instead
  of the full-screen default, with wrap-friendly finger-sized footer
  buttons. Not modal-sm itself: that caps desktop width at 340px and this
  modal wants 560px there.
- On touch devices the ready/swap paths no longer focus the field, so the
  OS keyboard does not pop over the alternates that just rendered.
- New static guard test/readmymind-phone-key.test.ts pins the dual-template
  key, the marker-class gating, the phone-hidden header button, the
  small-dialog phone modal, and the no-innerHTML discipline.

Part 2 of phase 3 (rethink steering, the free-text steer note) is next;
the API already accepts steer.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/web/public/settings-ui.js

@@ -2112,11 +2112,16 @@ Object.assign(CodemanApp.prototype, {
     // Read My Mind 🧠 — hidden unless the synced opt-in `readMyMindEnabled` is
     // ON (only an explicit true enables, mirroring the Approvals bell). Marker
     // class (base is display:inline-flex !important); phones hide it in
-    // mobile.css regardless (the phase-3 surface there is an accessory key).
+    // mobile.css regardless (their surface is the keyboard-accessory 🧠 key,
+    // re-synced right below).
     const readMyMindBtn = document.querySelector('.btn-readmymind');
     if (readMyMindBtn) {
       readMyMindBtn.classList.toggle('btn-readmymind--hidden', settings.readMyMindEnabled !== true);
     }
+    // The accessory-bar 🧠 key shares the setting; its marker class lives on
+    // the bar element (keyboard-accessory.js), so a live toggle from a
+    // settings save reveals/hides it without a reload.
+    if (typeof KeyboardAccessoryBar !== 'undefined') KeyboardAccessoryBar.syncReadMyMind?.();
 
     // Plan-usage chip — shown by default on desktop, OFF on handhelds (App
     // Settings → Display → "Plan Usage Limits"). The template always ships it