Prevent infinite recursion reporting a problem

[StephenMcConnel]

Devin review

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This change is 

[greptile-apps]

Greptile Summary

Adds a per-thread boolean flag (s_isReporting) to break a mutual-recursion cycle where ShowToast triggers a network/reporting operation that eventually calls back into NonFatalProblem.Report, causing a StackOverflowException.

• The [ThreadStatic] attribute is the right tool here: the recursion is synchronous and same-thread, so per-thread isolation correctly blocks the cycle without affecting unrelated threads.
• The finally block in the new code guarantees the flag is reset even if ShowToast throws, and the guard is placed precisely at the passive/toast code path that produces the cycle.

Important Files Changed

Filename	Overview
src/BloomExe/NonFatalProblem.cs	Adds a [ThreadStatic] reentrancy guard around ShowToast to break the Report → ShowToast → SendBundle → ReportConnectionError → Report recursion cycle; implementation is correct.

_{Reviews (1): Last reviewed commit: "Prevent infinite recursion reporting a p..." | Re-trigger Greptile}