feat(web): persist town radio pause preference in localStorage

[harshithmullapudi]

Summary

• Persist the radio's pause/play choice under town-radio:paused in localStorage so a paused radio stays paused across reloads.
• Autoplay arm skips the default track when the flag is set.
• toggle writes the flag; next / prev / select clear it (picking a track implies intent to play).

Test plan

• Load the app, let the radio auto-start on first interaction, pause it → reload → radio stays paused, no auto-start on next click.
• Pause, then reload and press play in the popover → radio plays and the flag clears; reload again → radio auto-starts.
• With the radio paused, press next/prev/select in the popover → playback starts and the persisted flag clears.
• Private / storage-disabled mode → radio still works, just doesn't remember the preference.

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