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* 🚑 Fix RangeError from re-entrant error handling in errors.cljs Two complementary changes to prevent 'RangeError: Maximum call stack size exceeded' when an error fires while the potok store error pipeline is still on the call stack: 1. Re-entrancy guard on on-error: a volatile flag (handling-error?) is set true for the duration of each on-error invocation. Any nested call (e.g. from a notification emit that itself throws) is suppressed with a console.error instead of recursing indefinitely. 2. Async notification in flash: the st/emit!(ntf/show ...) call is now wrapped in ts/schedule (setTimeout 0) so the notification event is pushed to the store on the next event-loop tick, outside the error-handler call stack. This matches the pattern already used by the :worker-error, :svg-parser and :comment-error handlers. * 🐛 Add unit tests for app.main.errors Test coverage for the error-handling module: - stale-asset-error?: 6 cases covering keyword-constant and protocol-dispatch mismatch signatures, plus negative cases - exception->error-data: plain JS Error, ex-info with/without :hint - on-error dispatch: map errors routed via ptk/handle-error, JS exceptions wrapped into error-data before dispatch - Re-entrancy guard: verifies that a second on-error call issued from within a handle-error method is suppressed (exactly one handler invocation) --------- Signed-off-by: Andrey Antukh <niwi@niwi.nz>