Settings: relax 480px panel cap and align account row right side (#47)

- Bump .settings-panel max-width 480px → 760px so settings page actually
  uses available desktop width (the 480px cap was a leftover from an
  initial mobile-first sketch).
- Account row main grid columns become fixed: 28px tag · 1fr email ·
  60px plan · 180px expiry. Plan and expiry badges now line up
  vertically across rows regardless of email length.

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

apps/dashboard/src/styles.css

@@ -722,7 +722,8 @@ button:disabled {
 .settings-panel {
   display: grid;
   gap: 14px;
-  max-width: 480px;
+  max-width: 760px;
+  width: 100%;
 }
 
 .settings-row {
@@ -909,7 +910,7 @@ button:disabled {
 
 .settings-account-main {
   display: grid;
-  grid-template-columns: 28px minmax(0, 1fr) auto auto;
+  grid-template-columns: 28px minmax(0, 1fr) 60px 180px;
   gap: 10px;
   align-items: center;
   min-width: 0;