Restores the legacy stdout/stderr auth-pattern fallback in
checkCursorAgentAvailability() that the plan's Task 2 Step 4
required but the implementation had dropped. Threads an optional
deps parameter through checkCursorConnectionIfNeeded() so its
error branch is reachable in tests, and switches both it and the
manual-refresh route to exhaustive switch statements over the
renewal result. Adds a short-lived host-keyed dedup cache around
tryIdeAuth() so multiple due Cursor connections sharing a host
don't each open the same state.vscdb file in one sweep tick.
Adds opportunistic eviction to the manual-refresh cooldown map,
an outer try/catch to the availability route for defense-in-depth
consistency with the plan's other routes, and corrects a stale
JSDoc claim about the /login route's auth check. Documents the
now-empirically-confirmed agent-cli-state.json schema mismatch
found while validating against a real cursor-agent install.
Adds src/lib/tokenHealthCheckCursor.ts, sweep-side glue that calls
the renewal orchestrator and persists the result, wired into
tokenHealthCheck.ts's checkConnection() via a new Cursor-specific
branch placed ahead of the generic no-refresh-token fallthrough.
Carves out a non-terminal exception for a Cursor connection that
already landed at testStatus "expired" via the request-time 401
path, excluding permanently-dead account_deactivated connections.
Extends buildRefreshFailureUpdate() with an overrides param so
Cursor's failure path can use a distinct, non-terminal errorCode
instead of the generic refresh_failed/expired taxonomy.
