Dispenser Improvements

[droplister]

Summary

• Create dispenser review: rename labels to match form ("Escrow Amount", "Amount per Dispense"), add USD equivalents for BTC fields
• Close dispenser form: reorder details (Remaining → Price → TX Hash), remove 5-block note, increase dropdown font size
• Close dispenser review: show dispenser tx hash and escrow amount being returned
• Dispense review: rename "Dispenser TX Hash" → "Dispenser", reorder fields (dispenser shown before # of dispenses)
• Dispense form: include estimated fee in insufficient balance error message
• Market dispensers page: fix "My Dispensers" link, extract CopyableStat component, fix copy highlight to not include checkmark

Test plan

• Create dispenser: verify review labels match form, USD shows for BTC fields
• Close dispenser form: verify Remaining shows before Price, no 5-block note
• Close dispenser review: verify tx hash and escrow return amount display
• Dispense review: verify "Dispenser" label and field order
• Dispense form: test Max button with high fee rate (1200 sat/vB)
• Market page: test "My Dispensers" navigates, copy highlight is correct