⚡ Bolt: Optimize LinearClockBitmapGenerator drawing loop

[google-labs-jules]

💡 What:

• Replaced floating-point division (/ minutesPerPixel) with multiplication (* pixelsPerMinute) in the main drawing loops.
• Optimized actualEndMin calculation in the event loop to avoid redundant null checks and property access for DayEvent.end.

🎯 Why:

• Division is computationally more expensive than multiplication. Since generate() runs frequently (every minute per widget) and iterates over events and hours, this micro-optimization reduces CPU cycles.
• Avoiding redundant null checks makes the loop tighter and cleaner.

📊 Impact:

• Reduces arithmetic cost inside the drawing loops (O(N) for events, O(M) for hours).
• Improvement is in nanoseconds/microseconds range per call, but contributes to overall efficiency for background widget updates.

Note:

• During verification, a syntax error (§§import) was found in app/src/main/kotlin/com/dagsbalken/app/ui/dagskompisen/WeatherAssistantCard.kt which prevented compilation.
• I temporarily fixed it locally to verify my changes (lint passed), but I have reverted that fix in this PR to strictly follow atomic commit principles and avoid out-of-scope changes.
• The repository build is currently broken due to that file, but this PR's changes are correct and verified in isolation.

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PR created automatically by Jules for task 2252159343462383843 started by @Zoekur

[google-labs-jules]

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