M6: design system in :core:design (Kalas muted, design-spec §2 and §3)

KvittTheme with every Material and Kvitt colour role light and dark, the 14
category colours with containers, chart and avatar colours, type scale with
tabular amount styles, spacing, shapes (stable fallbacks: MaterialShapes is not
in Material 3 1.4.0), elevation and motion springs; 191 Material Symbols
Rounded vector drawables (33 category tokens filled and outline, UI icons);
253 shared strings from docs/ux/strings.csv in values and values-sv with
plurals; pure-Kotlin MoneyFormatter, DateFormatter (ISO weeks) and AmountInput
with unit tests; every component of design-spec §3 with TalkBack semantics,
including the ledger rows and editor fields (D-019) and Canvas charts; a
preview catalogue in the debug source set; 212 Roborazzi goldens (49 sheets x
light/dark x sv/en plus 16 at 200 %). The two :app empty-screen goldens are
re-recorded because they render the real theme now (PNG only).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TQd3pEP9UeN2uifbHknQ7B

android/core/design/build.gradle.kts

@@ -1,9 +1,24 @@
-// :core:design — theme, tokens, shared components and formatters. M2b ships only the placeholder theme; M6 owns it.
+// :core:design — theme, tokens, shared components, charts, formatters and shared strings (SPEC §6.2, docs/ux/design-spec.md
+// §2 and §3). Owned by M6; feature modules (M7x) consume it and may not edit it.
 plugins {
     id("kvitt.android.library")
     id("kvitt.android.compose")
+    alias(libs.plugins.roborazzi)
+}
+
+roborazzi {
+    outputDir.set(file("src/test/screenshots"))
 }
 
 dependencies {
     api(project(":core:model"))
+    // Avatars: pictures are loaded by Coil; :app supplies the request model through LocalAvatarPictures (design-spec §3.3).
+    implementation(libs.coil.compose)
+
+    debugImplementation(libs.androidx.compose.ui.test.manifest)
+    testImplementation(libs.androidx.compose.ui.test.junit4)
+    testImplementation(libs.robolectric)
+    testImplementation(libs.roborazzi)
+    testImplementation(libs.roborazzi.compose)
+    testImplementation(libs.roborazzi.junit.rule)
 }