Pad admin cards so content isn't flush against the border

The admin views used bare .card, which has no padding; add card-pad.

Claude-Session: https://claude.ai/code/session_016mBLURvJoMuUEr9cB2RpUN

internal/web/static/js/admin.js

@@ -76,7 +76,7 @@ async function load() {
 
 function render() {
   if (!state.me?.user?.is_admin) {
-    clear(view(), h('div', { class: 'card' },
+    clear(view(), h('div', { class: 'card card-pad' },
       h('p', { class: 'muted', text: 'Administration is for system administrators. Ask one for access.' })));
     return;
   }
@@ -152,7 +152,7 @@ function teamsCard() {
       h('td', { class: 'num', text: String(t.open_incidents) }),
     ));
 
-  return h('div', { class: 'card' },
+  return h('div', { class: 'card card-pad' },
     h('h2', { text: 'Teams' }),
     h('p', { class: 'muted small' },
       'Open a team for who is in it, the invites into it, and renaming or ',
@@ -229,7 +229,7 @@ function usersCard() {
     );
   });
 
-  return h('div', { class: 'card' },
+  return h('div', { class: 'card card-pad' },
     h('h2', { text: 'Users' }),
     h('p', { class: 'muted small' },
       'Disabling an account stops it signing in and stops its API keys, and keeps ',
@@ -368,7 +368,7 @@ function settingsCard() {
       h('td', {}, h('code', { text: k })),
       h('td', { class: 'muted', text: v === '' ? '(unset)' : v })));
 
-  return h('div', { class: 'card' },
+  return h('div', { class: 'card card-pad' },
     h('h2', { text: 'Settings' }),
     h('p', { class: 'muted small', text: 'Saved changes take effect on the next sweep — no restart.' }),
     form,