feat(hid): rebind POP Keys' dedicated emoji keys

[RafRaf]

I recently picked up a POP Keys keyboard and wanted to remap the emoji row the same way I remap everything else on my Logi gear (I've actually swapped in some of the spare keycaps it ships with, so what's printed on my keys right now isn't even the stock heart-eyes/crying/smiley/tears set — more on why that doesn't matter below). Turns out OpenLogi has no way to bind those keys at all — 4 of POP Keys' 5 dedicated emoji keys aren't modeled as a ButtonId anywhere. Only the "open emoji panel" key was already covered (KeyEmoji).

This PR adds the missing four as new ButtonId variants (KeyEmojiHeartEyes, KeyEmojiCrying, KeyEmojiSmiley, KeyEmojiTears) and wires their CIDs (0x104–0x107) into the 0x1b04 diversion table, so they're bindable in config.toml the same way KeySearch/KeyDictation/etc. already are. The naming/binding is by HID++ control ID, not by whatever's printed on the cap — since POP Keys keycaps are swappable, that's the only thing that actually stays stable per key.

I only did the config-side plumbing, not a dashboard entry — figured this counts as a small fix rather than a new feature. The Keys tab doesn't render this category of key at all yet (not even the existing 9), so a proper POP Keys render in the dashboard felt like its own, bigger effort and probably deserves a separate PR.

Tested locally on macOS — fmt/clippy/test --workspace all pass, and I confirmed live on my own POP Keys (spare caps and all) that it actually works:

[devices."direct:046d:b365:serial:xxxxxxxx".bindings]
KeyEmojiHeartEyes = { TypeText = "👍" }
KeyEmojiCrying = { TypeText = "❤️" }
KeyEmojiSmiley = { TypeText = "🔥" }
KeyEmojiTears = { TypeText = "😂" }

Happy to adjust naming or scope if you'd rather it done differently.

[greptile-apps]

Greptile Summary

The PR makes four dedicated POP Keys emoji controls configurable through the existing HID++ keyboard-diversion path.

• Adds append-only ButtonId variants and unbound defaults for the four controls.
• Maps CIDs 0x0104–0x0107 into keyboard capture.
• Documents an example POP Keys binding.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains.

Important Files Changed

Filename	Overview
crates/openlogi-core/src/binding/button.rs	Adds four append-only emoji-key identifiers and includes them in the keyboard-key set without changing existing serialized identifiers.
crates/openlogi-core/src/binding/defaults.rs	Gives the new keyboard controls unbound defaults so their native behavior remains unless configured.
crates/openlogi-hid/src/session/keyboard.rs	Maps the four POP Keys control IDs into the existing capability-gated HID++ diversion and event-dispatch flow.
docs/config.example.toml	Adds a configuration example demonstrating a dedicated emoji-key binding.

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