⚡ Bolt: Scope TimelineView tightly around CountdownRing

[google-labs-jules]

💡 What: Scoped TimelineView tightly around CountdownRing in RunningView.swift.
🎯 Why: Wrapping the entire view inside a TimelineView closure causes unnecessary re-evaluations and redraws of static elements (buttons, labels) on every tick.
📊 Impact: Reduces CPU usage and unnecessary view re-evaluations.
🔬 Measurement: Verify by checking the CPU profile during the running state.

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PR created automatically by Jules for task 2698215342502265197 started by @TytaniumDev

[google-labs-jules]

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