fix: polish wallet ui

[pwltr]

Description

This PR polishes the current wallet UI stack:

• Aligns button text styles, small button sizing, scanner/send icon button backgrounds, selected tab indicator color, and money symbol styling.
• Tightens amount screen, transfer flow, wallet activity, invoice tag, receive confirmation, boost sheet, and activity detail spacing/typography.
• Updates onboarding/settings intro copy, translations, sheet intro layout behavior, and restore wallet mnemonic emphasis.
• Keeps a changelog fragment for the wallet polish work and restores the existing incoming payment request fragment from master.

Design

Mapped screen references are listed in docs/screens-map.md for the touched screens, including:

• HomeScreen.kt → Wallet On-chain › Wallet BTC
• SavingsWalletScreen.kt → Savings, Spending, Hardware Balances › Savings Populated
• SpendingWalletScreen.kt → Savings, Spending, Hardware Balances › Spending Ready
• SpendingAmountScreen.kt / SpendingAdvancedScreen.kt / SpendingConfirmScreen.kt → Transfer to Spending Balance From Savings frames
• EditInvoiceScreen.kt / ReceiveConfirmScreen.kt / ReceiveQrScreen.kt → receive/send invoice frames
• ActivityDetailScreen.kt / AllActivityScreen.kt → transaction/activity frames
• RestoreWalletScreen.kt / OnboardingSlidesScreen.kt / CreateWalletScreen.kt → onboarding frames
• BackupIntroScreen.kt / QuickPayIntroScreen.kt → settings intro frames

Out-of-map sheets and shared components were cross-checked against the existing iOS implementation and user-provided screenshots during implementation.

Preview

QA Notes

Manual Tests

• Open the wallet home screen and verify the section spacing between balances, activity, and action areas remains visually consistent.
• Open Savings and Spending wallet screens and verify the transfer button has the intended space before the first activity row.
• Walk through the transfer-to-spending amount, advanced, and confirm screens; verify title/amount spacing, number pad spacing, amount symbols, and coin image tilt on slider drag.
• Open receive invoice editing and verify tags sit in the same row as the add tag button, note/add-tag input styling matches, and selected tag spacing is correct.
• Open transaction details and the boost sheet; verify the boost icon, fee amount symbol, long duration text, outline suggested-fee button, and single top toast behavior.
• Walk through onboarding/settings intro screens and restore wallet; verify copy, translations, sheet image placement, and focused mnemonic word weight.

Automated Checks

• ./gradlew compileDevDebugKotlin

[pwltr]

Hopefully this is the right fix for #1267.

[pwltr]

Should this default to false for all sheets?

[pwltr]

This fixed small button text and disabled styles