chore: 🔀 merge upstream nightly v0.0.46-nightly.20261010.2908

[chamaquita-d3]

Closes #72

Merges upstream v0.0.46-nightly.20261010.2908 into custom-nightly. Fork CI typechecks and builds the desktop app.

File:lines	Class	custom-nightly	Upstream	Kept	Why
apps/desktop/src/ipc/DesktopIpcHandlers.ts:71-84	disjoint	imports for dock mood and background folder IPC	imports webLinks IPC	both	Different IPC methods; both are registered.
apps/mobile/src/App.tsx:93-118	disjoint	wraps the tree in a View with PhoneBackgroundLayer and PhoneBackgroundQuickAdjust	adds NativeLayoutMetricsProvider	both	Fork's background layer stays; upstream's provider wraps the navigation and hosts.
apps/server/package.json:46-60	disjoint	ai, diff deps	@t3tools/source-control-* workspace deps	both	Different dependencies, listed alphabetically.
apps/server/src/provider/acp/AcpSessionRuntime.processTree.test.ts:655-670	same question	fake pids start at process.pid + 1	fake pids start at 500 000 (or 1 000) so none shares the runner's process group	upstream	Upstream's base avoids the server's own group. The fork's tombstone pids, merged cleanly, now use the same base (parentPidBase) so the file typechecks.
apps/server/src/server.ts:674-684	disjoint	layerVoiceTranscription provided in the misc layers	layerUsage moved above layerBackground; source-control drivers moved to a package	both	Kept upstream's new layerUsage position and added the fork's voice layer.
apps/web/src/components/chat/ChatComposer.tsx:4316-4335	disjoint	voice.messageSent(sentPrompt) after send	onTypingGuardSend() after send	both	Independent post-send hooks.
pnpm-lock.yaml	generated	fork deps	upstream lock	upstream, then pnpm install --ignore-scripts	Reconciled with the merged manifests.
scripts/build-desktop-artifact.ts:1322-1440	same question	renderMacEntitlements writes entitlements (mic access) for every signed build, wrapping the passkey fragment	resolveMacWebAuthnEntitlements reads the provisioning profile; renderMacPasskeyEntitlements takes the result	both	Passkey renderer is now a fragment taking upstream's profile-derived MacWebAuthnEntitlements. renderMacEntitlements(passkeySigning, webAuthn) keeps the fork's always-on microphone entitlement.
scripts/build-desktop-artifact.ts:2872-2890	disjoint	NSMicrophoneUsageDescription	CFBundleDocumentTypes for default-browser support	both	Separate Info.plist keys.
scripts/build-desktop-artifact.ts:3838-3862	same question	profile existence check and entitlements written for all signed mac builds	entitlements written only with passkey signing; profile parsed for WebAuthn	both	Entitlements are still written for every signed build. The profile is parsed only with passkey signing, and the result also feeds the stage package.json (t3codeWebAuthn).
scripts/build-desktop-artifact.test.ts:47-52,1931-2031	same question	tests renderMacEntitlements(config) and the microphone case	tests passkey rendering and profile resolution	both	Upstream's tests call renderMacEntitlements with the WebAuthn argument. The fork's microphone test is kept.
apps/desktop/src/ipc/methods/dockMood.ts:5	fix	imports HostProcessPlatform from @t3tools/shared/hostProcess	module renamed to @t3tools/shared/HostProcess, export Platform	upstream	Fork-only file; adapted to the rename (pingdotgg#17641).

Typecheck passes for scripts, apps/server, apps/desktop, apps/web, and apps/mobile. scripts/build-desktop-artifact.test.ts passes.

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