Add todoocard skill (parent) with today-eats sub-skill

[jiqimaooo]

Summary

• Add parent skill todoocard for TodooCard / 土豆片 six-color e-paper
• Nested sub-skill today-eats（今天吃点啥）
• Shared convert/send/protocol on the parent; sub-skills only hold UX/flow
• No device IDs, tokens, or personal data

Layout

todoocard/                      # parent skill (install this directory)
├── SKILL.md
├── config.example.json
├── evals/evals.json
├── references/protocol.md
├── scripts/                    # shared transport
│   ├── image_to_payload.py
│   ├── safe_send.py
│   ├── fast_send.py
│   ├── native_sender.swift
│   └── build_native_sender.sh
└── today-eats/                 # sub-skill
    ├── SKILL.md
    ├── evals/evals.json
    └── scripts/
        ├── cli.py
        └── meal_template.py

Why parent + sub-skill

TodooCard will grow more card types (weather, arbitrary image, etc.).
A single parent skill owns device binding and BLE; each sub-skill only describes its trigger and content pipeline.

Checklist

• kebab-case top-level skill directory todoocard
• Parent + sub-skill SKILL.md with name/description
• scripts/ references/ layout
• no secrets
• evals present

Test plan

• Install /var/minis/skills/todoocard (entire folder)
• python3 today-eats/scripts/cli.py scan / probe --save
• eat --prepare-only then full eat push

[wsvn53]

Thanks for the contribution! Found two small bugs during review — both are edge-case fallbacks, not blocking the main flow, but worth fixing:

1. Wrong fallback path for native_binary (todoocard/today-eats/scripts/cli.py)

native_bin = Path(cfg.get("native_binary") or (SCRIPTS / "native_sender"))

SCRIPTS here is today-eats/scripts/, but native_sender is built into the parent's todoocard/scripts/ (see build_native_sender.sh). The default config value is correct, but if native_binary is ever cleared/empty in config.json, this fallback points to a path that will never exist — it silently falls through to the slow CLI sender instead of the native one. Should be PARENT_SCRIPTS / "native_sender".

2. Stale references to a file that doesn't exist: todoocard_cli.py

• cli.py: raise SystemExit("... run: todoocard_cli.py scan && probe --save")
• meal_template.py (--send branch): subprocess.check_call(["python3", str(here / "todoocard_cli.py"), "eat", "--prepare-only"])

The actual entry point is cli.py, not todoocard_cli.py. The first is a misleading error message (copy-pasting it will just fail with "command not found"); the second is dead/broken code — if meal_template.py is ever run standalone with --send, it will crash looking for a nonexistent file.

Minor nit: PARENT_SCRIPTS = PARENT_ROOT / "scripts" is assigned twice in cli.py (once before the import, once right after) — harmless but looks like leftover from a rename.

Otherwise looks solid — no hardcoded device IDs/tokens, good protocol docs in references/protocol.md, evals present for both skills. Would like these fixed before merge.