⚡ Bolt: [presentation metrics calculation optimization]

[google-labs-jules]

💡 What: Refactored CreateEconomicMetrics in WorkspacePresentation.cs to calculate 9 actor-related metric dictionaries simultaneously using a single foreach loop and pre-allocated dictionaries.

🎯 Why: The previous implementation used 10 separate passes over SimulationActors, creating 9 separate LINQ .ToDictionary() allocations and executing redundant GetValueOrDefault ledger lookups per actor on every tick update, causing unnecessary GC pressure and CPU overhead on the UI thread.

📊 Impact: Reduces iteration count over the actors collection by 9x and eliminates 9 temporary enumerators/closure allocations on the hot path for updating UI metrics.

🔬 Measurement: UI tick metric creation speedup. Verified with dotnet test tests passing (0 failures).

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PR created automatically by Jules for task 15714439175362359004 started by @wnj00524

[google-labs-jules]

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