Follow-up to #2574 and f95f1ab18, which guarded the archive path. The
delete path had the same two defects and worse consequences.
`useSessionUIStore.deleteSession`/`deleteSessions` declared an `options`
parameter and discarded it on both paths, so a caller-supplied runtime
key was a silent no-op. `SessionDialogs.tsx:416` already passes options
today and they never reach the action.
The delete path also never rechecked the runtime. Session IDs are not
unique across runtimes, so a response produced by a previous runtime
could commit `finalizeConfirmedSessionDeletion` against the runtime the
user switched to: evicting an unrelated session from the live and global
stores and calling `cleanupPersistedSessionState`, which erases queued
messages, todos, folder membership, inline-comment drafts, chat draft,
and pins. That is user data loss, not stale cache.
`cleanupPersistedSessionState` already rejects an identity whose runtime
is no longer active, but `finalizeConfirmedSessionDeletion` defeated that
check by passing the live `getRuntimeKey()` at commit time, comparing a
value with itself. It now forwards the captured key.
Adopt the default-on shape from f95f1ab18: `expectedRuntimeKey` defaults
to the active runtime in `deleteSession`, `deleteSessionInDirectory` and
the new canonical `deleteSessions` action, and is rechecked before the
request and before every reconciliation. A `404` still means "already
deleted" and commits cleanup, but only while the captured runtime is
active; after a switch it describes the wrong runtime and the action
reports failure instead of committing.
Also documents the throw contract of `patchSessionMetadata`, a
non-blocking nit raised by the review bot on #2574.
Alexandre Reyes Martins
d19ff96c02