Advisor + localhost Artifact fallback - Mac test

Apple Silicon Mac testing build with the same fixes as the latest local Windows EXE.

Includes the advisor 1M checkbox, corrected tool-argument streaming, compaction timeout/error fixes, Artifact schema compatibility, and the new localhost fallback. When a converted-provider model calls Artifact, CC Switch returns guidance that claude.ai hosting is unavailable and directs the model to create/serve HTML locally and verify the URL.

Download CC-Switch-Advisor-macos-15.zip, quit the old test app, extract the ZIP on your Mac, and open CC Switch Advisor Test.app. Keep your existing profile/settings. The optional launcher uses a fresh, separate test profile.

This is an ad-hoc signed, unnotarized test app. See README for Apple's Open Anyway instructions and checksums in SHA256SUMS.txt. Actual localhost preview behavior still needs your manual test; no new live model requests were used.

Source: ab13462aa5491f8e839b7d19a77022da3dd3355a on feat/same-provider-advisor. An upstream advisor PR remains gated on manual Windows/Mac testing.

Verified on the native Apple Silicon runner: 273 Rust tests and 24 frontend tests passed, typecheck passed, the app displayed its main window and stayed running for 10 seconds, and strict signature verification passed both before and after ZIP extraction. The downloaded ZIP matches the CI SHA-256. Mac build and checks.