Settings as panels, the way the portal does it

Four tabs over three cards was navigation for its own sake, and the two shells
disagreed about what a settings screen looks like. It is one grid of cards now,
matching the portal: the account card carries changing a password and deleting
the account in its footer, appearance is a card with one row, and remote access
— an operator's concern, not a personal preference — is a card of its own for a
superuser.

SettingRow, alert-dialog and UserAvatar come across from the portal, so an
account renders the same face in both shells.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

bun.lock

@@ -33,6 +33,7 @@
         "@tanstack/react-table": "^8.21.3",
         "@xyflow/react": "^12.11.3",
         "axios": "1.13.2",
+        "boring-avatars": "^2.0.4",
         "class-variance-authority": "^0.7.1",
         "clsx": "^2.1.1",
         "cmdk": "^1.1.1",
@@ -535,6 +536,8 @@
 
     "binary-extensions": ["binary-extensions@2.3.0", "", {}, "sha512-Ceh+7ox5qe7LJuLHoY0feh3pHuUDHAcRUeyL2VYghZwfpkNIy/+8Ocg0a3UuSoYzavmylwuLWQOf3hl0jjMMIw=="],
 
+    "boring-avatars": ["boring-avatars@2.0.4", "", { "peerDependencies": { "react": ">=18.0.0", "react-dom": ">=18.0.0" } }, "sha512-xhZO/w/6aFmRfkaWohcl2NfyIy87gK5SBbys8kctZeTGF1Apjpv/10pfUuv+YEfVPkESU/h2Y6tt/Dwp+bIZPw=="],
+
     "braces": ["braces@3.0.3", "", { "dependencies": { "fill-range": "^7.1.1" } }, "sha512-yQbXgO/OSZVD2IsiLlro+7Hf6Q18EJrKSEsdoMzKePKXct3gvD8oLcOQdIzGupr5Fj+EDe8gO/lxc1BzfMpxvA=="],
 
     "browserslist": ["browserslist@4.28.1", "", { "dependencies": { "baseline-browser-mapping": "^2.9.0", "caniuse-lite": "^1.0.30001759", "electron-to-chromium": "^1.5.263", "node-releases": "^2.0.27", "update-browserslist-db": "^1.2.0" }, "bin": "cli.js" }, "sha512-ZC5Bd0LgJXgwGqUknZY/vkUQ04r8NXnJZ3yYi4vDmSiZmC/pdSN0NbNRPxZpbtO4uAfDUAFffO8IZoM3Gj8IkA=="],