refactor(theme-studio): restore studio state after mutating gates via withSavedState

Seven gates (locktest, mocktest, gallerytest, safetest, ndtest, viewlocktest,
expandpersisttest) mutated PALETTE/MAP/SYNTAX/UIMAP/PKGMAP/LOCKED and restored
nothing, so opening the studio at one of those #hashes left its state corrupted
for interactive use. Wrap each in withSavedState(keys, body), scoped to the keys
that gate touches: snapshot the named globals, run the body, restore in a finally.
Uses a JSON-round-trip clone (the studio objects carry values structuredClone
throws on — the same clone the gates' own local saves use). The 14 gates that
already restore locally are left as-is. Verified: all 44 gates green, the restore
round-trip holds for reassignment + in-place + Set mutation, and a forced
assertion in a wrapped gate still reports FAIL.

0 files changed, 0 insertions, 0 deletions