Diagnostic Appl for Swimlane B.1. Each section writes to a key that should classify into a different scope.
Expected scope: PERSONAL. Each viewer should see their own slice.
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Expected scope: SHARED. In B.1 falls back to legacy shared — everyone on this app sees the same value.
Expected scope: PUBLIC. Any viewer — including anonymous — sees the same value.
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Raw state — use this to confirm B.0 plumbing and B.1 dispatch.
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