treefmt: apply prettier

Pure `nix fmt` output from the commit before this one — no hand edits.
203 files: 52 md, 42 tsx, 32 js, 32 css, 21 ts, 13 html, 8 json, 3 mjs.

Reproduce with `nix develop -c nix fmt` on the parent commit; the result
should be byte-identical to this tree.

None of the 13 `.prettierignore` entries appears here — verified by
intersecting the changed-file list against the ignore file, with a
control proving the intersection finds a match when one exists.

frontend/packages/agent/src/lib/dashboardBase.ts

@@ -5,7 +5,7 @@
 // `/agent/<name>/` on the dashboard's own origin (`location.origin`);
 // accessed directly, it's the same host on `dashboardPort`.
 export function resolveDashboardBase(dashboardPort: number): string {
-  return location.pathname.startsWith('/agent/')
-    ? location.origin + '/'
+  return location.pathname.startsWith("/agent/")
+    ? location.origin + "/"
     : `${location.protocol}//${location.hostname}:${dashboardPort}/`;
 }