Files
dc17965c79 fix(mobile): serialize channel sections sync (#3165)
### What changed?

Serializes channel-section relay synchronization so a late relay
`CLOSED` cannot overlap an in-flight retry and install duplicate
subscriptions. Pending subscription results are invalidated and
immediately closed when the manager is disposed or superseded.

### Why?

The startup retry added in #3004 could race with a late `CLOSED` or
manager disposal, leaking an untracked live subscription. This keeps
retry recovery single-flight and makes the lifecycle boundary explicit.

### How is it tested?

Build and run.

Added tests:

-
[`ChannelSectionsManager`](https://github.com/block/buzz/tree/main/mobile/test/features/channels/channel_sections/channel_sections_manager_test.dart)
interleaving coverage for in-flight retry serialization and disposal
during subscription setup

*🤖 This PR was authored with a Buzz agent.*

Signed-off-by: npub15w828kxsxu2684ynste0uah2jwkgatd99flt7ds4523hzm8ju6cshdr8hh <a38ea3d8d03715a3d49382f2fe76ea93ac8eada52a7ebf3615a2a3716cf2e6b1@buzz.block.builderlab.xyz>
Co-authored-by: npub15w828kxsxu2684ynste0uah2jwkgatd99flt7ds4523hzm8ju6cshdr8hh <a38ea3d8d03715a3d49382f2fe76ea93ac8eada52a7ebf3615a2a3716cf2e6b1@buzz.block.builderlab.xyz>
2026-08-05 07:55:26 -07:00
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