web: simplify font fallbacks

web/workspace/src/app.css

@@ -60,24 +60,8 @@
     --radius-panel: 12px;
     --interactive-hover: oklch(94.5% 0 0);
     --interactive-selected: oklch(93% 0.02 230);
-    --font-sans:
-      "Gen Interface JP",
-      Inter,
-      ui-sans-serif,
-      system-ui,
-      -apple-system,
-      BlinkMacSystemFont,
-      "Segoe UI",
-      sans-serif;
-    --font-mono:
-      "IBM Plex Mono",
-      ui-monospace,
-      SFMono-Regular,
-      Menlo,
-      Monaco,
-      Consolas,
-      "Liberation Mono",
-      monospace;
+    --font-sans: "Gen Interface JP", sans-serif;
+    --font-mono: "IBM Plex Mono", monospace;
   }
   @media (prefers-color-scheme: dark) {
     :root {

web/workspace/src/lib/workspace/console/worker-console.ui.test.ts

@@ -18,9 +18,9 @@ Deno.test("workspace app css uses bundled UI fonts", async () => {
       appCss.includes("gen-interface-jp/500.css") &&
       appCss.includes("gen-interface-jp/600.css") &&
       appCss.includes("gen-interface-jp/700.css") &&
-      appCss.includes("--font-sans:") &&
-      appCss.includes('"Gen Interface JP"') &&
-      appCss.includes("Inter"),
+      appCss.includes('--font-sans: "Gen Interface JP", sans-serif;') &&
+      !appCss.includes("ui-sans-serif") &&
+      !appCss.includes("system-ui"),
     "global app css should import the tracked Gen Interface JP weights and prefer it in the sans font stack",
   );
   assert(
@@ -28,9 +28,9 @@ Deno.test("workspace app css uses bundled UI fonts", async () => {
       appCss.includes("@fontsource/ibm-plex-mono/latin-500.css") &&
       appCss.includes("@fontsource/ibm-plex-mono/latin-600.css") &&
       appCss.includes("@fontsource/ibm-plex-mono/latin-700.css") &&
-      appCss.includes("--font-mono:") &&
-      appCss.includes('"IBM Plex Mono"') &&
-      appCss.includes("ui-monospace"),
+      appCss.includes('--font-mono: "IBM Plex Mono", monospace;') &&
+      !appCss.includes("ui-monospace") &&
+      !appCss.includes("SFMono-Regular"),
     "global app css should import the tracked IBM Plex Mono weights and prefer it in the mono font stack",
   );
 });