[LeanBitLab]

💡 What: Moved GradientDrawable and RippleDrawable allocations out of onBindViewHolder hot-paths (HeaderViewHolder.bind and ClipViewHolder.setContent) and into their respective init blocks.
🎯 Why: Creating UI drawables repeatedly during RecyclerView scrolling causes unnecessary garbage collection pressure and layout jank.
📊 Expected Impact: Reduced memory allocation per scroll frame and smoother clipboard list scrolling.
🔬 Verification: Build and unit tests passed. No em dashes were introduced.

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PR created automatically by Jules for task 11512128971581730145 started by @LeanBitLab

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