feat: per-peripheral type icons with detection and manual picker

[MegaManSec]

Summary

Each peripheral now shows a type-specific icon instead of the single shared keyboard glyph, in both the menu-bar dropdown and the Peripheral settings tab. The displayed type is the user's manual override if set, otherwise auto-detected.

Changes

• PeripheralType — new enum (keyboard / mouse / trackpad / headphones / airpods / microphone / unknown) with availability-resolving SF Symbols (falls back to older glyphs on older macOS) and detect(name:classOfDevice:).
• Auto-detection — combines the Bluetooth Class of Device (best for audio gear, whose names rarely say "headphones") with the device name (AirPods vs any headset; mouse vs trackpad, both of which report as a generic pointing device).
• Manual picker — in Settings, each row's icon is a menu: Automatic (clears the override), the six types, and Other. Works in both Registered and Available sections; the override is keyed by address, so it carries over when an Available peripheral is added.
• Store — persisted local typeOverrides map + a deviceClasses cache populated from the live paired-device snapshot; peripheralType(for:) / setTypeOverride(_:for:).
• Name-refresh fix — registered names now reconcile against the live paired list, so renaming a device in System Settings -> Bluetooth propagates to the list, dropdown, and Settings. The Peripheral tab polls while visible, and the dropdown fetches on open.
• Dropdown interaction — rows act on mouse-up (released inside the row) instead of mouse-down; dragging off cancels.

Notes

• The type override is local to each Mac (not synced over the wire) — consistent with how peripheral metadata is handled today; the peer auto-detects its own icons.
• No new files (project uses explicit file refs) and no wire-protocol changes.

Test plan

• Dropdown shows correct per-type icons.
• Settings -> Peripheral: icon menu offers Automatic + 6 types + Other, in both Registered and Available.
• Rename a device in System Settings -> Bluetooth with the tab open -> updates within ~2s, no tab switch.
• Dropdown rows act on release, not press; drag-off cancels.

Builds clean and passes swift format lint.

[github-actions]

🎉 This PR is included in version 2.15.0 🎉

The release is available on GitHub release

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