feat(keymap): gaming layers + joystick launcher

[rdlu]

Closes #11.

Summary

Adds 5 new layers — GAME_PICK (transient launcher) + GAME_MC / GAME_LOL / GAME_DOOM / GAME_CS2 — entered from SYS via the joystick center key. The 4-way joystick cluster becomes a launcher: directionals pick a game, center cancels.

Design was discussed and locked in #11 (see comments dated 2026-04-11).

What landed

Entry / exit

• SYS pos 58 (was &mkp LCLK, dead duplicate of NAV's LCLK) → &to 5 (GAME_PICK)
• GAME_PICK joystick: UP→MC, DOWN→LoL, LEFT→Doom, RIGHT→CS2, CENTER→BASE (cancel). Every other key is &none so a stray press can't escape the picker.
• Exit combo 0 + 12 (top corners), scoped to layers 6-9 → &GAME_EXIT macro (RGB off + &to 0)
• Re-pick combo 0 + 5, scoped to layers 6-9 → &to 5

Cross-game chassis (identical for all 4 games)

• Plain WASD/QWER on left half, plain QWERTY on right half — chat works without leaving game mode
• LCTRL @ pos 39 (pinky, replaces BSLH) — sprint/crouch, unified across MC/Doom/CS2/LoL
• LSHIFT @ pos 57 (left thumb, BASE BSPC slot) — sneak/walk
• SPACE on both thumbs (pos 56 + 59)
• BSPC @ pos 60 (replaces BASE lt 2 DEL) — chat correction
• LALT @ pos 61 (replaces BASE caps_word)
• F13 @ pos 62 (replaces F12) — push-to-talk for Discord/in-game voice
• mo MEDIA @ pos 63 preserved for full media controls
• Joystick = audio cluster: VOL+ / VOL- / MUTE / play-pause + center ENTER
• Encoder = volume up/down everywhere

Per-game variant

Only pos 0 differs: F3 (debug screen) on MC, ` (console) on LoL/Doom/CS2.

The four games stay as separate layers so the OLED display-name and the per-game RGB color (green MC / gold LoL / red Doom / blue CS2) make the active mode obvious.

RGB feedback

Each game-entry macro chains &rgb_ug RGB_ON, &rgb_ug RGB_COLOR_HSB(...), &to N. Exit macro chains &rgb_ug RGB_OFF, &to 0.

Test plan

• CI build succeeds for both halves
• Flash both halves; verify mise run draw SVG matches expectation
• Hold SYS (left thumb), tap joystick center, release SYS → OLED shows GAME?
• From GAME?, tap joystick UP → OLED shows MINECRFT, RGB underglow turns green
• In Minecraft: WASD moves, LSHIFT (pos 57) sneaks, LCTRL (pos 39) sprints, SPACE jumps, T opens chat, type a sentence using the right half, ENTER sends
• Joystick UP/DN/LT/RT adjust volume / mute / play-pause without leaving game mode
• Hold pos 63 → MEDIA layer accessible
• F13 PTT works in Discord (after binding it there)
• Combo 0 + 12 exits cleanly back to BASE, RGB turns off
• Combo 0 + 5 returns to picker without bouncing through BASE
• Repeat smoke test for LoL / Doom / CS2

🤖 Generated with Claude Code

[rdlu]

Implementation summary

Implemented per the locked design in #11. Branch: feat/game-layers, single commit.

Files touched:

• config/eyelash_sofle.keymap — added 4 game-entry macros + 1 exit macro, 2 new combos (exit/re-pick), modified SYS pos 58, added 5 new layers
• keymap-drawer/eyelash_sofle.{yaml,svg} — regenerated via mise run draw

Non-obvious choices:

1. Layers 6-9 are nearly identical bindings — only pos 0 differs (F3 vs grave). Kept them as 4 separate layers so the OLED display-name and per-game RGB color provide unambiguous visual feedback. Future per-game tuning has a place to live.
2. GAME_PICK uses &none for non-launcher keys, not &trans — prevents accidentally typing through to BASE while in launcher mode.
3. Exit combo timeout = 50ms — strict, since both keys are corners pressed deliberately.
4. F2 (screenshot) kept on left thumb pos 53 — replaces BASE mo SYS. SYS access from a game layer is unnecessary; F2 is cheap to keep.
5. &mkp LCLK on SYS pos 58 was dead weight before this PR (LCLK is also on NAV pos 15). Repurposing it as the launcher entry costs nothing.

Awaiting: CI build artifacts, then v2.0.0 pre-release.
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