Show real flag image in registration phone field

Flag emojis don't render on Windows, so derive an ISO code from the
emoji's regional indicators and load a flagcdn image in front of the
country-code selector (Account + Verify steps).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/app/dashboard/dashboard.css

@@ -891,9 +891,6 @@
   .dash-root .tm .ds-btn.v-primary { background: rgba(253, 169, 19, 0.92); color: #fff; border-radius: 9.132px; box-shadow: 0 8px 20px -10px rgba(253, 169, 19, 0.75); }
   .dash-root .tm .ds-btn.v-primary svg { color: #fff; }
   .dash-root .tm .ds-btn.v-primary:not(:disabled):hover { background: rgba(253, 169, 19, 1); }
-
-  .dash-root .view-body { display: flex; flex-direction: column; gap: 14px; }
-  
   .dash-root .tm-toolbar { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
   .dash-root .tm-search { display: flex; align-items: center; gap: 8px; flex: 1; min-width: 220px; height: 44px; padding: 0 13px; border-radius: 13px; border: 1px solid var(--border-2); background: var(--panel-2); color: var(--muted); transition: 0.14s; }
   .dash-root .tm-search:focus-within { border-color: var(--orange); box-shadow: 0 0 0 3px var(--ring); color: var(--orange); }