release: 2.8.0

[jamesarich]

Release 2.8.0 — milestone integration onto main

This PR rolls up the entire 2.8.0 milestone onto main. Every milestone PR was retargeted onto release/2.8.0 and merged in dependency order, with conflicts and Room schema renumbering resolved per-PR (verified by per-PR CI plus local build/lint before each merge). This branch is the single, reviewed integration point for the release.

⚠️ Held for sign-off — do not merge to main until cumulative CI is green and the release is signed off.

Merge readiness: main is an ancestor of this branch (0 behind / 18 ahead); a fast-forward is clean — git merge-tree reports no conflicts and the merged tree is byte-identical to the release tree. See Merge strategy below.

🌟 New Features

• feat(ai): Add App Functions for system AI integration #5585 — App Functions for system AI integration; exposes mesh workflows to the Android system and on-device agents.
• feat(car): Android Car App Library integration #5633 — Android Car App Library integration (Android Auto).
• feat: FTS5 full-text message search #5373 — FTS5 full-text message search (Room v39).
• feat: add air quality telemetry display (PM1.0, PM2.5, PM10, CO2) #5701 — Air-quality telemetry display: PM1.0 / PM2.5 / PM10 / CO₂ (Room v40).
• feat(node): msh.to device hardware links ("I want one" section + Settings directory) #5714 — msh.to device hardware links: "I want one" section + Settings directory (Room v41).
• feat(discovery): mesh network discovery #5275 — Mesh network discovery (Room v42).
• feat(settings): implement set_ham_mode HamParameters admin message #5780 — set_ham_mode HamParameters admin message.

🛠️ Refactoring & Architecture — KMP Migration Milestone

• refactor: Remove AIDL API and modernize service architecture #5586 — Remove the AIDL API and modernize the service architecture: replaces the bound-service AIDL surface with a coroutine RadioController seam in core.repository, moving business logic toward commonMain. Downstream PRs were fixed up against the moved/renamed APIs (DataPacket.{ID_BROADCAST,…} → NodeAddress.*, getPacketId() → generatePacketId(), SendMessageUseCase now returns Int).
• refactor(node): fetch device links from the API, drop the bundled matcher #5765 — Fetch device links from the API and drop the bundled matcher.
• Discovery now consumes the upstream org.meshtastic:protobufs Maven dependency (after Replace :core:proto with org.meshtastic:protobufs:2.7.25 #5675) instead of locally-generated protos (dfb414813).

🐛 Bug Fixes

• fix: resolve release/2.8.0 branch-review findings (car hosts, AI node IDs, discovery abort, AQ zeros) #5813 — Resolve release/2.8.0 branch-review findings: Car host-allowlist digests, AI node-ID formatting for high-bit node nums, discovery scan abort/restore ordering, and air-quality zero-suppression — plus added FTS-backfill and discovery-abort regression tests.
• fix(node): chart local-node air-quality telemetry (orphaning + zero-suppression) #5793 — Chart local-node air-quality telemetry (fixes series orphaning + clean-air 0 µg/m³ suppression).
• Start AppFunctionStateSync from the Application rather than createdAtStart (b5dd6ff9e).
• Use a single connection for in-memory test databases (613dee91b).

🧹 Chores

• perf: add Baseline Profile generation for :androidApp #5735 — Baseline Profile generation for :androidApp (cold-start AOT).
• docs: update repo/developer/in-app docs and repair the screenshot pipeline for 2.8.0 #5775 — Update repo/developer/in-app docs and repair the screenshot pipeline for 2.8.0.
• Bump VERSION_NAME_BASE → 2.8.0 (versionCode stays git-derived) (b40fa567d).
• Run Pull Request CI for PRs targeting release/** branches (9a0ed4ddf).

Room schema serialization (resolved)

main was at Room v38. The four DB-touching PRs each originally claimed v39; they were serialized by merge order to v39 → v40 → v41 → v42 — each renumbered on its branch (bump version, re-chain @AutoMigration, regenerate NN.json via Room export). Every migration is validated by Room codegen at build time.

Deferred to a follow-up

• feat: firmware lockdown mode (provision / unlock / lock-now) #5439 firmware lockdown — needs LockdownAuth.max_session_seconds / disable and LockdownStatus.State.DISABLED, which are merged on protobufs develop (#916, #929) but not yet in a tagged org.meshtastic:protobufs release. Re-port once a release carrying them is published. (Protos come from the pinned Maven dependency — there is no proto submodule.)

Merge strategy

A clean fast-forward is available (verified non-mutating, main left untouched):

• CLI fast-forward (git push origin release/2.8.0:main) — preserves all 18 reviewed SHAs verbatim, linear, no merge commit; auto-closes this PR.
• Merge commit — preserves an explicit release boundary and an atomic-revert handle, at the cost of a non-linear edge.
• "Rebase and merge" (button) — linear, but rewrites the commit SHAs.

Commit 9a0ed4ddf adds release/** to the PR-CI branches trigger; this carries to main on merge. Intended as ongoing policy for future release branches — keep unless you want it reverted pre-merge.

Testing Performed

• PacketFtsSearchTest (FTS search DAO): search match / non-match, conversation scoping, and a backfill regression (Kotlin-side DataPacket.text decode) — added in fix: resolve release/2.8.0 branch-review findings (car hosts, AI node IDs, discovery abort, AQ zeros) #5813.
• DiscoveryScanEngineTest: reconnect-timeout abort, manual stop, and normal completion each restore the home LoRa preset and finalize the session — added in fix: resolve release/2.8.0 branch-review findings (car hosts, AI node IDs, discovery abort, AQ zeros) #5813.
• AiFunctionProviderImplTest: high-bit node-num round-trip (num = -1 → !ffffffff) — added in fix: resolve release/2.8.0 branch-review findings (car hosts, AI node IDs, discovery abort, AQ zeros) #5813.
• Each milestone PR's own unit tests (per-PR CI green before merge).
• Full local baseline on the integrated branch: ./gradlew spotlessCheck detekt assembleDebug test allTests kmpSmokeCompile.

🤖 Generated with Claude Code

[github-actions]

✅ Preview staleness check passed

Preview and screenshot references are up to date.

[github-actions]

✅ Docs staleness check passed

This PR includes updates to docs/en/ alongside the source changes. Thank you!

[github-actions]

✅ Screenshot reference staleness passed

Preview and screenshot references are up to date.

[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
2711	1	2710	0

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

org.meshtastic.core.data.repository.DeviceLinkRepositoryImplTest::reconcilePrunesShortCodesNoLongerInCatalog()[jvm]

Stack Traces | 0.096s run time

org.opentest4j.AssertionFailedError: expected: <[a]> but was: <[a, b]>
	at kotlin.test.junit5.JUnit5Asserter.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.data.repository.DeviceLinkRepositoryImplTest$reconcilePrunesShortCodesNoLongerInCatalog$1.invokeSuspend(DeviceLinkRepositoryImplTest.kt:172)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:34)
	at kotlinx.coroutines.UndispatchedCoroutine.afterResume(CoroutineContext.kt:278)
	at kotlinx.coroutines.AbstractCoroutine.resumeWith(AbstractCoroutine.kt:101)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:47)
	at kotlinx.coroutines.internal.DispatchedContinuationKt.resumeCancellableWithInternal(DispatchedContinuation.kt:384)
	at kotlinx.coroutines.DispatchedCoroutine.afterResume(Builders.common.kt:588)
	at kotlinx.coroutines.AbstractCoroutine.resumeWith(AbstractCoroutine.kt:101)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:47)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:100)
	at kotlinx.coroutines.internal.LimitedDispatcher$Worker.run(LimitedDispatcher.kt:124)
	at kotlinx.coroutines.scheduling.TaskImpl.run(Tasks.kt:89)
	at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:586)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:798)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:717)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:704)

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