ideathinklab01-source d17eff29d5 fix(delegate): guard _load_config() against delegation: null in config.yaml ...

YAML parses `delegation: null` as Python None. `dict.get(key, {})`
only uses the default when the key is *missing*, not when it exists with
a None value, so `cfg.get("max_concurrent_children")` crashes with
`'NoneType' object has no attribute 'get'`.

Same pattern as fd9b692d (fix(tui): tolerate null top-level sections).
Use `dict.get(key) or {}` to handle both missing and None-valued keys.

Closes: delegation null config crash (same class as #7215, #7346)

2026-05-04 03:09:59 -07:00

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