[stable-25.0.x] Bugfix/noid/fix npe for get message - #6598
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getMessage's network fallback called getAndPersistMessages(bundle), which does `bundle.getSerializable(KEY_FIELD_MAP) as HashMap<String, Int>` - a non-null cast that throws NullPointerException when the key is absent. None of getMessage's callers (pinned message lookup, both getMessageById overloads in ChatViewModel) ever put KEY_FIELD_MAP into the bundle, so this crashed whenever the requested message wasn't already cached locally. java.lang.NullPointerException at OfflineFirstChatRepository.getAndPersistMessages (OfflineFirstChatRepository.kt:546) at OfflineFirstChatRepository$getMessage$1.invokeSuspend (OfflineFirstChatRepository.kt:451) Fetch the message directly via network.getContextForChatMessage instead, the same by-id lookup loadMessageContext already uses for this situation, rather than routing through the windowed pull API that getAndPersistMessages is meant for. Assisted-by: Claude Code:claude-sonnet-5 Signed-off-by: Marcel Hibbe <dev@mhibbe.de>
getAndPersistMessages required its bundle to carry KEY_FIELD_MAP but only enforced that via an unsafe cast, so a missing key surfaced as a bare NullPointerException with no indication of what went wrong. Its only remaining callers (initLongPolling, loadMoreMessages) are both internal and already set the field map correctly, so this can only fire on a future programming error - the right response is still to crash, not to swallow it, but with a message that says why instead of an opaque NPE. Document the precondition on the function and replace the cast with requireNotNull. Assisted-by: Claude Code:claude-sonnet-5 Signed-off-by: Marcel Hibbe <dev@mhibbe.de>
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Backport of PR #6592