fix(android): bundle the typefaces instead of fetching them at runtime

Typography.kt resolved Fraunces, Inter and JetBrains Mono through the Play
Services font provider, which fetches them over the network on first use.
Same rule-164 problem the web client had, with a second failure mode on
top: the provider is absent entirely on devices without Play Services, so
the app fell back to the platform default and stopped looking like
Minstrel — quietly, with no error.

The five static instances now live in res/font, vendored by the same
tools/vendor-fonts.py that produces the web bundle. Both clients draw
from one list of faces so they cannot drift apart. Cost is ~0.86 MB of
APK; the runtime path is removed rather than kept as a fallback — the
ui-text-google-fonts dependency, its version-catalog entry and the
provider certificate hashes in font_certs.xml are all gone.

Two things about fetching TTFs that are worth writing down, because both
fail by succeeding:

Google Fonts picks the format from the User-Agent, and there is no
parameter to ask for one. A modern UA gets woff2, which res/font cannot
load. The obvious "use an old UA" fix gets EOT — an IE-only format that
downloads happily, has a plausible size, and is entirely useless here. An
Android 4.4 UA is what actually yields TrueType.

css2 also collapses a multi-weight request to 400 for legacy clients, so
asking for Medium silently returns Regular: a valid TrueType file that
renders at the wrong weight everywhere. Each weight is therefore fetched
on its own URL, and the script now asserts OS/2 usWeightClass on every
download — that field is the only thing distinguishing the two files.

Verified before wiring: all five carry TrueType magic, the 400/500 pairs
differ, and their usWeightClass reads 400/400/500/500/400 as declared
beside them in the FontFamily.

Not covered: there is no guard for this on the Android side. The web
equivalent is asserted by no-external-assets.test.ts, but the Android
tree has no source-inspection test pattern to follow and no way to
falsify one without a local Gradle run.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SQ31KQpYbStyK5y58UmPLH

android/app/build.gradle.kts

@@ -150,7 +150,6 @@ dependencies {
     implementation(libs.compose.ui)
     implementation(libs.compose.ui.graphics)
     implementation(libs.compose.material3)
-    implementation(libs.compose.ui.text.google.fonts)
     debugImplementation(libs.compose.ui.tooling)
     implementation(libs.compose.ui.tooling.preview)
 

android/app/src/main/java/com/fabledsword/minstrel/theme/Typography.kt

@@ -2,72 +2,45 @@ package com.fabledsword.minstrel.theme
 
 import androidx.compose.material3.Typography
 import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.text.font.Font
 import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.text.font.FontStyle
 import androidx.compose.ui.text.font.FontWeight
-import androidx.compose.ui.text.googlefonts.Font
-import androidx.compose.ui.text.googlefonts.GoogleFont
 import androidx.compose.ui.unit.sp
 import com.fabledsword.minstrel.R
 
 /**
- * Google Fonts provider — fetches font files via Play Services Fonts at
- * runtime, caches them across launches. Matches the Flutter client's
- * `google_fonts` package behaviour (no bundled .ttf files in either tree).
+ * Bundled typefaces, vendored into res/font by tools/vendor-fonts.py.
+ *
+ * These were fetched at runtime through the Play Services font provider until
+ * 2026-09-09. That is a network dependency for rendering, and a deployed
+ * instance is not guaranteed one — the provider is also absent entirely on
+ * devices without Play Services, where the app silently fell back to the
+ * platform default and stopped looking like Minstrel. Bundling costs ~0.86 MB
+ * of APK and removes both failure modes.
  *
  * Per FabledSword design system:
  *   - Fraunces — display + headline (mythic serif)
  *   - Inter — body + label (clean sans for UI text)
  *   - JetBrains Mono — technical / monospace
  * Weights are restricted to 400 (regular) and 500 (medium) only.
+ *
+ * Each res/font entry is a single static instance, not a variable font: the
+ * weight declared beside it here must match the file's own OS/2
+ * usWeightClass, which the vendoring script asserts on download.
  */
-private val GoogleFontProvider = GoogleFont.Provider(
-    providerAuthority = "com.google.android.gms.fonts",
-    providerPackage = "com.google.android.gms",
-    certificates = R.array.com_google_android_gms_fonts_certs,
-)
-
-private val FrauncesFont = GoogleFont("Fraunces")
-private val InterFont = GoogleFont("Inter")
-private val JetBrainsMonoFont = GoogleFont("JetBrains Mono")
-
 private val Fraunces = FontFamily(
-    Font(
-        googleFont = FrauncesFont,
-        fontProvider = GoogleFontProvider,
-        weight = FontWeight.W400,
-        style = FontStyle.Normal,
-    ),
-    Font(
-        googleFont = FrauncesFont,
-        fontProvider = GoogleFontProvider,
-        weight = FontWeight.W500,
-        style = FontStyle.Normal,
-    ),
+    Font(R.font.fraunces_regular, FontWeight.W400, FontStyle.Normal),
+    Font(R.font.fraunces_medium, FontWeight.W500, FontStyle.Normal),
 )
 
 private val Inter = FontFamily(
-    Font(
-        googleFont = InterFont,
-        fontProvider = GoogleFontProvider,
-        weight = FontWeight.W400,
-        style = FontStyle.Normal,
-    ),
-    Font(
-        googleFont = InterFont,
-        fontProvider = GoogleFontProvider,
-        weight = FontWeight.W500,
-        style = FontStyle.Normal,
-    ),
+    Font(R.font.inter_regular, FontWeight.W400, FontStyle.Normal),
+    Font(R.font.inter_medium, FontWeight.W500, FontStyle.Normal),
 )
 
 private val JetBrainsMono = FontFamily(
-    Font(
-        googleFont = JetBrainsMonoFont,
-        fontProvider = GoogleFontProvider,
-        weight = FontWeight.W400,
-        style = FontStyle.Normal,
-    ),
+    Font(R.font.jetbrains_mono_regular, FontWeight.W400, FontStyle.Normal),
 )
 
 /**

android/app/src/main/res/values/font_certs.xml

@@ -1,16 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Google Fonts provider certificate hashes for downloadable fonts via
-     androidx.compose.ui.text.googlefonts.GoogleFont.Provider. Standard
-     values published by Google; copied verbatim from the AndroidX docs. -->
-<resources>
-    <array name="com_google_android_gms_fonts_certs">
-        <item>@array/com_google_android_gms_fonts_certs_dev</item>
-        <item>@array/com_google_android_gms_fonts_certs_prod</item>
-    </array>
-    <string-array name="com_google_android_gms_fonts_certs_dev">
-        <item>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</item>
-    </string-array>
-    <string-array name="com_google_android_gms_fonts_certs_prod">
-        <item>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</item>
-    </string-array>
-</resources>

android/gradle/libs.versions.toml

@@ -53,7 +53,6 @@ compose-ui-graphics = { module = "androidx.compose.ui:ui-graphics" }
 compose-ui-tooling = { module = "androidx.compose.ui:ui-tooling" }
 compose-ui-tooling-preview = { module = "androidx.compose.ui:ui-tooling-preview" }
 compose-material3 = { module = "androidx.compose.material3:material3" }
-compose-ui-text-google-fonts = { module = "androidx.compose.ui:ui-text-google-fonts" }
 hilt-android = { module = "com.google.dagger:hilt-android", version.ref = "hilt" }
 hilt-compiler = { module = "com.google.dagger:hilt-compiler", version.ref = "hilt" }
 room-runtime = { module = "androidx.room:room-runtime", version.ref = "room" }