Stream enhancements: audio chimes, withdraw button state, pulsing indicators, cliff reminders

[Akanimoh12]

Summary

This PR addresses four related UI/UX enhancements for the stream component ecosystem, closing issues #799-802:

• components/stream/RateTicker.tsx: add audio chime toggle when streaming milestone is reached #799 (Audio chime on milestones): RateTicker now supports optional audio notifications at threshold crossings, enabling gamified user engagement for streaming milestones
• components/stream/BulkWithdrawButton.tsx: disable button with tooltip if claimable balance is zero #800 (Disable button with tooltip): BulkWithdrawButton properly indicates unavailable state with tooltip when no claimable funds exist
• components/stream/StreamCard.tsx: add status pill with pulsing green indicator for active streaming #801 (Pulsing active indicator): StreamCard displays an animated green pulse dot to visually differentiate active streams from completed/static ones
• components/stream/AddToCalendarButton.tsx: generate ICS calendar file with stream cliff reminder #802 (Cliff reminder in calendar): AddToCalendarButton now includes optional cliff unlock reminder 24 hours before unlock for initial fund notification

Test plan

• Audio chime toggles on/off correctly and plays at configured milestone thresholds
• Withdraw button disabled with visible tooltip when all streams have zero claimable balance
• Pulsing indicator appears only for active streams, not paused/ended/cancelled
• Cliff reminder option appears in calendar dropdown when cliffTime is provided
• All existing functionality remains unaffected (backward compatible)

Closes #799
Closes #800
Closes #801
Closes #802

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