T3 Code 0.1.5-netpro2k.1

Fix native Claude update notifications to follow the version its installer actually offers.

• Determine Claude's effective Stable or Latest update channel using its read-only doctor command, then check Anthropic's native release feed.
• Keep unavailable or unrecognized native update information unknown rather than advertising npm-only releases.
• Preserve native Claude's configured home for update commands and isolate version caches between differently configured instances sharing one executable.
• Keep existing npm, Homebrew, mise, and other package-manager handling.

This addresses Studio showing native Claude 2.1.314 as outdated because npm advertises 2.1.316, even though claude update correctly reports the native installation is up to date. The corrected resolver was checked against Studio's real installation and reports installed 2.1.314 / installable latest 2.1.314.

Based on the same official upstream v0.1.5 as the previous fork build. Mac ARM64 and Linux x64 desktop/server artifacts are built from the same source. Use the normal in-app update flow; the installed Claude version and update channel are preserved.