Add split-repo compatibility gates for terraphim-ai server and desktop #23
Description
Problem
The split between terraphim-ai-desktop and the sibling terraphim-ai repo needs ongoing compatibility coverage. Today the manual compile/build checks pass, but the relationship is not yet enforced by a dedicated compatibility gate.
Goal
Add explicit desktop/server compatibility checks for the split-repo architecture.
Scope
- codify the validated contract surface between desktop web mode and
terraphim_server - add scripts or CI steps that run
cargo check -p terraphim_server, desktop Rust checks, frontend build, and focused parity tests - document expected server endpoints and Tauri command names used by the desktop app
Acceptance
- compatibility steps are scripted and documented
- regressions in server endpoints or desktop callers fail early
- desktop/server parity is testable without re-discovering contracts manually