feat: hardware wallet detail screen

[jvsena42]

Part of #589

This PR adds a detail screen for paired hardware wallets. Tapping a device's tile on the home screen now opens a Savings/Spending-style overview of that watch-only wallet instead of a "Coming Soon" notice.

Description

• Adds the Hardware Wallet detail screen: the device name with a blue Bitcoin icon in the top bar, a balance header, the device's on-chain activity grouped by date with blue hardware icons, and a Remove button.
• Adds a Transfer To Spending button on funded devices; it shows a "not yet implemented" notice for now (the on-device signed transfer flow lands in a later PR).
• Removing a device shows a confirmation dialog explaining funds stay safe, then stops the device's watchers, deletes its stored activity, and forgets every paired entry for that wallet, so its tile and balance disappear from the home screen.
• Empty / zero-balance devices show only the balance header and the Remove button.
• Renders the global Send / Scan / Receive bar on the new route, matching the Savings and Spending screens.

This is the iOS port of synonymdev/bitkit-android#1022. iOS already had the watch-only data layer (per-device deviceIds, removeDevice, walletsLoaded, blue hardware activity icons, and walletId-scoped activity queries), so this PR is mainly the detail screen and its navigation wiring.

Linked Issues/Tasks

• FIGMA
• Part of epic epic: Trezor Hardware Wallet UI #589
• Stacked on feat: home-screen hardware wallet (watch-only) #605
• Ports synonymdev/bitkit-android#1022

Screenshot / Video

with-activities.mov

delete.mov

QA Notes

OBS: Only tested with emulator

Manual Tests

• 1. Pair a Trezor -> Home -> tap the hardware tile -> Hardware Wallet opens: device name with a blue Bitcoin icon in the top bar, balance header, recent device activity with blue icons.
• 2. Hardware Wallet (funded) -> tap Transfer To Spending: "Transfer to spending not yet implemented." toast shows.
• 3. Hardware Wallet -> tap an activity item -> Activity Item opens.
• 4a. Hardware Wallet -> tap Remove -> confirm dialog (funds-safe copy) -> Cancel: dialog closes, still on Hardware Wallet.
  • 4b. tap Remove -> Remove: returns to Home, the tile is gone, the headline total drops the hardware balance, no error toast.
• 5. Empty / zero-balance device -> Hardware Wallet: ₿0 balance header, no Transfer button, Remove button shown, Send/Receive bar visible.
• 6. regression: Home, Savings, Spending, and All Activity -> bottom Send/Scan/Receive bar visible on each.

Automated Checks

• Build passes: xcodebuild -workspace Bitkit.xcodeproj/project.xcworkspace -scheme Bitkit -configuration Debug -destination 'platform=iOS Simulator,id=<iPhone 16>' ONLY_ACTIVE_ARCH=YES build (concrete simulator UDID + ONLY_ACTIVE_ARCH=YES because the Rust xcframeworks are arm64-only).
• Tests pass: BitkitTests/HwWalletManagerTests (29 tests) — existing coverage for removeDevice (stops watchers, deletes activities) and forget-via-update. No new tests added because the new code is SwiftUI view orchestration over the already-tested HwWalletManager.removeDevice and TrezorManager.forgetDevice.
• SwiftFormat: clean on changed files.
• node scripts/validate-translations.js could not run locally (missing glob dependency / no package.json in this checkout); the added English keys are well-formed.
• CI: standard build and test checks run by the PR bot.

[jvsena42]

Waiting for #605 merge to open this branch for review