feat(docs): In-app documentation browser with Jekyll site and Docusaurus sync

[jamesarich]

Summary

Adds a full in-app documentation browser to the Meshtastic Android & Desktop app, backed by a Jekyll site for standalone browsing and a Docusaurus sync pipeline for meshtastic.org.

What's included

In-app docs browser (feature/docs)

• 17 user guide pages + 9 developer guide pages written against source code
• Markdown rendering via multiplatform-markdown-renderer with M3 theming
• Keyword search engine with aliases and weighted scoring
• TOC with per-page icons via MeshtasticIcons
• Inline screenshot rendering via Coil 3 + ComposeResourceImageTransformer
• Deep link support (meshtastic://docs/{pageId})
• Crowdin i18n for user-facing pages

Jekyll site (docs/)

• just-the-docs v0.11.0 theme with Meshtastic M3 colors
• Auto-deployed via GitHub Pages on push to main
• Section index pages with What's New highlights

Docusaurus sync (Phase 10)

• scripts/sync-android-docs.js — transforms Jekyll → Docusaurus format
• WebP screenshot conversion via cwebp
• Weekly sync workflow (lives in meshtastic/meshtastic#2405)

New content pages (Phase 10)

• docs/user/translate.md — Crowdin contribution guide
• docs/developer/measurement.md — MetricFormatter API guide

Screenshot testing

• 8 @PreviewLightDark previews in DocsPreviews.kt
• 8 screenshot tests in DocsScreenshotTests.kt

Verification

• ./gradlew spotlessApply detekt assembleDebug test allTests passes
• Sync script dry-run verified (27 pages + 37 screenshots)

Related

• Docusaurus sync PR: meshtastic/meshtastic#2405
• Apple equivalent: meshtastic/meshtastic#2393
• Spec: specs/20260507-161858-app-docs-markdown/

[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
2373	1	2372	0

View the top 1 failed test(s) by shortest run time

org.meshtastic.core.database.DatabaseManagerWithDbRetryTest::withDb retries against current database when previous pool closes during switch

Stack Traces | 20.3s run time

java.lang.AssertionError: expected:<42424242> but was:<null>
	at org.junit.Assert.fail(Assert.java:89)
	at org.junit.Assert.failNotEquals(Assert.java:835)
	at org.junit.Assert.assertEquals(Assert.java:120)
	at kotlin.test.junit.JUnitAsserter.assertEquals(JUnitSupport.kt:32)
	at kotlin.test.AssertionsKt__AssertionsKt.assertEquals(Assertions.kt:63)
	at kotlin.test.AssertionsKt.assertEquals(Unknown Source)
	at kotlin.test.AssertionsKt__AssertionsKt.assertEquals$default(Assertions.kt:62)
	at kotlin.test.AssertionsKt.assertEquals$default(Unknown Source)
	at org.meshtastic.core.database.DatabaseManagerWithDbRetryTest$withDb retries against current database when previous pool closes during switch$1.invokeSuspend(DatabaseManagerWithDbRetryTest.kt:99)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:34)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:100)
	at kotlinx.coroutines.test.TestDispatcher.processEvent$kotlinx_coroutines_test(TestDispatcher.kt:24)
	at kotlinx.coroutines.test.TestCoroutineScheduler.tryRunNextTaskUnless$kotlinx_coroutines_test(TestCoroutineScheduler.kt:98)
	at kotlinx.coroutines.test.TestBuildersKt__TestBuildersKt$runTest$2$1$workRunner$1.invokeSuspend(TestBuilders.kt:326)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:34)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:100)
	at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:256)
	at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:54)
	at kotlinx.coroutines.BuildersKt__BuildersKt.runBlockingImpl(Builders.kt:30)
	at kotlinx.coroutines.BuildersKt.runBlockingImpl(Unknown Source)
	at kotlinx.coroutines.BuildersKt__Builders_concurrentKt.runBlockingK(Builders.concurrent.kt:172)
	at kotlinx.coroutines.BuildersKt.runBlockingK(Unknown Source)
	at kotlinx.coroutines.BuildersKt__Builders_concurrentKt.runBlockingK$default(Builders.concurrent.kt:157)
	at kotlinx.coroutines.BuildersKt.runBlockingK$default(Unknown Source)
	at kotlinx.coroutines.test.TestBuildersJvmKt.createTestResult(TestBuildersJvm.kt:10)
	at kotlinx.coroutines.test.TestBuildersKt__TestBuildersKt.runTest-8Mi8wO0(TestBuilders.kt:309)
	at kotlinx.coroutines.test.TestBuildersKt.runTest-8Mi8wO0(TestBuilders.kt:1)
	at kotlinx.coroutines.test.TestBuildersKt__TestBuildersKt.runTest-8Mi8wO0(TestBuilders.kt:167)
	at kotlinx.coroutines.test.TestBuildersKt.runTest-8Mi8wO0(TestBuilders.kt:1)
	at kotlinx.coroutines.test.TestBuildersKt__TestBuildersKt.runTest-8Mi8wO0$default(TestBuilders.kt:159)
	at kotlinx.coroutines.test.TestBuildersKt.runTest-8Mi8wO0$default(TestBuilders.kt:1)
	at org.meshtastic.core.database.DatabaseManagerWithDbRetryTest.withDb retries against current database when previous pool closes during switch(DatabaseManagerWithDbRetryTest.kt:69)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
	at org.robolectric.RobolectricTestRunner$HelperTestRunner$1.evaluate(RobolectricTestRunner.java:524)
	at org.robolectric.internal.SandboxTestRunner.executeInSandbox(SandboxTestRunner.java:494)
	at org.robolectric.internal.SandboxTestRunner.access$900(SandboxTestRunner.java:67)
	at org.robolectric.internal.SandboxTestRunner$7.evaluate(SandboxTestRunner.java:442)
	at org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
	at org.robolectric.internal.SandboxTestRunner.access$600(SandboxTestRunner.java:67)
	at org.robolectric.internal.SandboxTestRunner$6.evaluate(SandboxTestRunner.java:333)
	at org.robolectric.internal.SandboxTestRunner$3.evaluate(SandboxTestRunner.java:233)
	at org.robolectric.internal.SandboxTestRunner$5.lambda$evaluate$0(SandboxTestRunner.java:317)
	at org.robolectric.internal.bytecode.Sandbox.lambda$runOnMainThread$0(Sandbox.java:101)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
	at java.base/java.lang.Thread.run(Thread.java:1583)

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