ENH - use Inter across phone UI

frontend/src/assets/main.css

@@ -211,9 +211,11 @@
   }
 }
 :root {
-  font-family:
-    -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue',
-    sans-serif;
+  font-family: var(--sky-font-family);
+  font-feature-settings:
+    'liga' 1,
+    'calt' 1;
+  font-optical-sizing: auto;
   font-synthesis: none;
   text-rendering: optimizeLegibility;
   -webkit-font-smoothing: antialiased;
@@ -234,7 +236,9 @@ body,
   user-select: none;
 }
 button,
-input {
+input,
+textarea,
+select {
   font: inherit;
 }
 button {
@@ -1632,8 +1636,7 @@ button {
   overflow: hidden;
   background: #000;
   color: #f5f5f7;
-  font-family:
-    -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', sans-serif;
+  font-family: var(--sky-font-family);
 }
 .darkchat-page button,
 .darkchat-page input,
@@ -7833,8 +7836,7 @@ button {
   min-height: var(--springboard-grid-row);
 }
 .app-icon-button {
-  font-family:
-    -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', sans-serif;
+  font-family: var(--sky-font-family);
   touch-action: none;
   user-select: none;
   -webkit-user-select: none;

frontend/src/components/HomeFolderOverlay.vue

@@ -331,8 +331,7 @@ function finishPageSwipe(event: PointerEvent): void {
   z-index: 70;
   inset: 0;
   color: #fff;
-  font-family:
-    -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', sans-serif;
+  font-family: var(--sky-font-family);
 }
 
 .home-folder-backdrop {

frontend/src/components/PayphoneOverlay.vue

@@ -399,7 +399,7 @@ onBeforeUnmount(() => {
     rgb(30 38 42 / 35%),
     rgb(0 0 0 / 84%) 72%
   );
-  font-family: 'Segoe UI', Arial, sans-serif;
+  font-family: var(--sky-font-family);
   pointer-events: auto;
   user-select: none;
 }

frontend/src/components/RadioHud.vue

@@ -210,7 +210,7 @@ onBeforeUnmount(() => {
   z-index: 40;
   display: flex;
   pointer-events: none;
-  font-family: Inter, ui-sans-serif, system-ui, sans-serif;
+  font-family: var(--sky-font-family);
 }
 
 .radio-hud[data-horizontal='left'] {

frontend/src/components/SpringboardWidget.vue

@@ -677,9 +677,7 @@ onBeforeUnmount(() => {
   backdrop-filter: blur(26px) saturate(125%);
   -webkit-backdrop-filter: blur(26px) saturate(125%);
   cursor: pointer;
-  font-family:
-    -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text',
-    'Segoe UI', sans-serif;
+  font-family: var(--sky-font-family);
   user-select: none;
   -webkit-user-select: none;
   touch-action: none;

frontend/src/ui/InterFont.contract.test.ts

@@ -0,0 +1,59 @@
+import { existsSync, readdirSync, readFileSync } from 'node:fs'
+import { join } from 'node:path'
+import { fileURLToPath } from 'node:url'
+
+import { describe, expect, it } from 'vitest'
+
+const sourceDirectory = fileURLToPath(new URL('..', import.meta.url))
+const tokensSource = readFileSync(new URL('./tokens.css', import.meta.url), 'utf8')
+const mainCssSource = readFileSync(
+  new URL('../assets/main.css', import.meta.url),
+  'utf8',
+)
+
+function styleSources(directory: string): Array<{
+  file: string
+  source: string
+}> {
+  return readdirSync(directory, { withFileTypes: true }).flatMap((entry) => {
+    const path = join(directory, entry.name)
+    if (entry.isDirectory()) return styleSources(path)
+    if (!/\.(?:css|vue)$/.test(entry.name)) return []
+    return [{ file: path, source: readFileSync(path, 'utf8') }]
+  })
+}
+
+describe('Inter font contract', () => {
+  it('bundles normal and italic variable fonts for every supported weight', () => {
+    expect(
+      existsSync(new URL('../assets/fonts/InterVariable.woff2', import.meta.url)),
+    ).toBe(true)
+    expect(
+      existsSync(
+        new URL('../assets/fonts/InterVariable-Italic.woff2', import.meta.url),
+      ),
+    ).toBe(true)
+    expect(tokensSource.match(/@font-face/g)).toHaveLength(2)
+    expect(tokensSource.match(/font-weight:\s*100 900;/g)).toHaveLength(2)
+    expect(tokensSource).toContain("--sky-font-family: 'Inter', Arial, sans-serif;")
+  })
+
+  it('applies the shared font to the document and native form controls', () => {
+    expect(mainCssSource).toMatch(
+      /:root\s*\{[\s\S]*?font-family:\s*var\(--sky-font-family\);/,
+    )
+    expect(mainCssSource).toMatch(
+      /button,\s*input,\s*textarea,\s*select\s*\{\s*font:\s*inherit;/,
+    )
+  })
+
+  it('does not bypass the shared token with a generic system UI stack', () => {
+    const genericSystemStack =
+      /font-family\s*:\s*(?:-apple-system|BlinkMacSystemFont|system-ui|ui-sans-serif|['"]Segoe UI['"])/
+    const violations = styleSources(sourceDirectory)
+      .filter(({ source }) => genericSystemStack.test(source))
+      .map(({ file }) => file.slice(sourceDirectory.length + 1))
+
+    expect(violations).toEqual([])
+  })
+})

frontend/src/ui/foundation.css

@@ -525,8 +525,7 @@
   height: var(--sky-widget-label-height);
   overflow: hidden;
   color: var(--sky-widget-label-color, #fff);
-  font-family:
-    -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', sans-serif;
+  font-family: var(--sky-font-family);
   font-size: 11.5px;
   font-weight: 500;
   letter-spacing: -0.15px;

frontend/src/ui/tokens.css

@@ -1,3 +1,19 @@
+@font-face {
+  font-family: 'Inter';
+  font-style: normal;
+  font-weight: 100 900;
+  font-display: swap;
+  src: url('../assets/fonts/InterVariable.woff2') format('woff2');
+}
+
+@font-face {
+  font-family: 'Inter';
+  font-style: italic;
+  font-weight: 100 900;
+  font-display: swap;
+  src: url('../assets/fonts/InterVariable-Italic.woff2') format('woff2');
+}
+
 :root {
   --sky-device-pixel-ratio: 1;
   --sky-hairline-scale: 1;
@@ -26,9 +42,7 @@
   --sky-font-title: 17px;
   --sky-font-medium-title: 24px;
   --sky-font-large-title: 34px;
-  --sky-font-family:
-    -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'SF UI Text',
-    'Helvetica Neue', Helvetica, Arial, sans-serif;
+  --sky-font-family: 'Inter', Arial, sans-serif;
   --sky-transition-fast: 100ms;
   --sky-transition-normal: 200ms;
   --sky-ease-out: cubic-bezier(0.22, 1, 0.36, 1);

frontend/src/views/apps/BillingApp.vue

@@ -791,7 +791,7 @@ onBeforeUnmount(() => {
   flex-direction: column;
   color: #f6f7f9;
   background: #07090c;
-  font-family: Inter, system-ui, sans-serif;
+  font-family: var(--sky-font-family);
 }
 .billing-app--light {
   --billing-border: rgb(15 23 42 / 10%);

frontend/src/views/apps/CalendarApp.vue

@@ -1156,13 +1156,7 @@ onMounted(async () => {
   padding: 47px 0 24px;
   background: var(--bg);
   color: var(--label);
-  font-family:
-    Inter,
-    -apple-system,
-    BlinkMacSystemFont,
-    'SF Pro Display',
-    system-ui,
-    sans-serif;
+  font-family: var(--sky-font-family);
 }
 
 .calendar--light {

frontend/src/views/apps/CityMarktApp.vue

@@ -2195,7 +2195,7 @@ onMounted(async () => {
   overflow: hidden;
   background: #151613;
   color: #f8f8f4;
-  font-family: Inter, system-ui, sans-serif;
+  font-family: var(--sky-font-family);
 }
 .citymarkt--light {
   --ink: #fff;

frontend/src/views/apps/FeatherApp.vue

@@ -3590,7 +3590,7 @@ onMounted(async () => {
   overflow: hidden;
   background: #12171b !important;
   color: #f7f8f4;
-  font-family: Inter, system-ui, sans-serif;
+  font-family: var(--sky-font-family);
 }
 .feather-app--active.feather-app--light {
   --feather-panel: #f0f1ec;

frontend/src/views/apps/FlipTokApp.vue

@@ -3375,7 +3375,7 @@ onBeforeUnmount(() => {
   overflow: hidden;
   background: #000;
   color: #fff;
-  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', sans-serif;
+  font-family: var(--sky-font-family);
 }
 .state,
 .light-empty,

frontend/src/views/apps/LocalPagesApp.vue

@@ -1526,7 +1526,7 @@ onMounted(async () => {
   overflow: hidden;
   background: #12171b;
   color: #f7f7f2;
-  font-family: Inter, system-ui, sans-serif;
+  font-family: var(--sky-font-family);
 }
 .pages--light {
   --yellow: #8a6500;

frontend/src/views/apps/MemoryApp.vue

@@ -278,7 +278,7 @@ onBeforeUnmount(() => {
   background:
     radial-gradient(circle at 88% 8%, rgb(255 255 255 / 72%), transparent 28%),
     linear-gradient(155deg, #f4efff 0%, #e7ddff 55%, #d9cdf7 100%);
-  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
+  font-family: var(--sky-font-family);
   user-select: none;
 }
 

frontend/src/views/apps/MinesweeperApp.vue

@@ -419,7 +419,7 @@ onBeforeUnmount(() => {
   background:
     radial-gradient(circle at 88% 7%, rgb(108 231 218 / 32%), transparent 30%),
     linear-gradient(155deg, #effcf7 0%, #cfeee5 52%, #abdcd7 100%);
-  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
+  font-family: var(--sky-font-family);
   touch-action: manipulation;
   user-select: none;
 }

frontend/src/views/apps/NeonDropApp.vue

@@ -376,7 +376,7 @@ onBeforeUnmount(() => {
   padding: 52px 14px 25px;
   color: #f5fbff;
   background: radial-gradient(circle at 50% 0, #253163, #090c22 58%, #050715);
-  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
+  font-family: var(--sky-font-family);
   user-select: none;
   touch-action: manipulation;
 }

frontend/src/views/apps/NumberMergeApp.vue

@@ -334,7 +334,7 @@ onBeforeUnmount(() => window.removeEventListener('keydown', handleKeydown))
   background:
     radial-gradient(circle at 86% 8%, rgb(255 192 94 / 28%), transparent 29%),
     linear-gradient(155deg, #fff3dc 0%, #f3d8b7 55%, #e8b98d 100%);
-  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
+  font-family: var(--sky-font-family);
   touch-action: none;
   user-select: none;
 }

frontend/src/views/apps/SkyFlappyApp.vue

@@ -166,7 +166,7 @@ onBeforeUnmount(() => {
 </template>
 
 <style scoped>
-.flappy-app { --sky-a:#50d8f2;--sky-b:#765ce8;--tower:#574be8;--tower-light:#9b94ff;--tower-dark:#3429a6;--tower-glow:#79e7ff; position:absolute;inset:0;overflow:hidden;padding:52px 16px 27px;color:#fff;background:linear-gradient(160deg,#19375e,#433b80);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;user-select:none;touch-action:manipulation; }
+.flappy-app { --sky-a:#50d8f2;--sky-b:#765ce8;--tower:#574be8;--tower-light:#9b94ff;--tower-dark:#3429a6;--tower-glow:#79e7ff; position:absolute;inset:0;overflow:hidden;padding:52px 16px 27px;color:#fff;background:linear-gradient(160deg,#19375e,#433b80);font-family:var(--sky-font-family);user-select:none;touch-action:manipulation; }
 .flappy-app--playing { padding:0; }
 .flappy-app--neon { --sky-a:#151c58;--sky-b:#a329a2;--tower:#19dfe6;--tower-light:#82ffff;--tower-dark:#087f91;--tower-glow:#26fbff; }.flappy-app--storm { --sky-a:#6f8497;--sky-b:#2b3955;--tower:#df765f;--tower-light:#ffb18e;--tower-dark:#8d3e39;--tower-glow:#ff997d; }
 .flappy-header{height:55px;display:flex;align-items:center;justify-content:space-between}.flappy-header span{display:block;color:#d9e9fa;font-size:14px;font-weight:850;letter-spacing:1.1px;text-transform:uppercase}.flappy-header h1{margin:1px 0 0;font-size:32px;line-height:1}.flappy-header button,.flappy-toolbar button{width:36px;height:36px;display:grid;place-items:center;padding:0;border:1px solid #ffffff35;border-radius:12px;color:#fff;background:#ffffff18}

frontend/src/views/apps/SnakeApp.vue

@@ -302,7 +302,7 @@ onBeforeUnmount(() => {
   background:
     radial-gradient(circle at 85% 8%, rgb(100 211 91 / 22%), transparent 30%),
     linear-gradient(165deg, #142b25 0%, #0c1715 62%, #08100f 100%);
-  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
+  font-family: var(--sky-font-family);
   user-select: none;
   touch-action: none;
 }

frontend/src/views/apps/TowerStackApp.vue

@@ -314,7 +314,7 @@ onBeforeUnmount(() => {
 </template>
 
 <style scoped>
-.tower-app { position: absolute; inset: 0; overflow: hidden; padding: 52px 16px 27px; color: #eef5ff; background: radial-gradient(circle at 75% 8%, #7146c866, transparent 35%), linear-gradient(170deg, #161634, #242054 52%, #10132c); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; user-select: none; touch-action: manipulation; }
+.tower-app { position: absolute; inset: 0; overflow: hidden; padding: 52px 16px 27px; color: #eef5ff; background: radial-gradient(circle at 75% 8%, #7146c866, transparent 35%), linear-gradient(170deg, #161634, #242054 52%, #10132c); font-family: var(--sky-font-family); user-select: none; touch-action: manipulation; }
 .tower-app--playing { padding: 0; }
 .tower-header { height: 50px; display: flex; align-items: center; justify-content: space-between; }
 .tower-header span { display: block; color: #c1b8f1; font-size: 10px; font-weight: 850; letter-spacing: 1.1px; text-transform: uppercase; }