chore: change camelCase to snake_case

[stevekaplan123]

Description

Change strings

[gitvelocity-reviewer]

📊 Code Quality Score: 1/100

10 × 0.1 (Nano ESF) = 1

Category	Score	Factors
🔭 Scope	2/20	2 locale files, pure key rename, no logic changes, no new APIs
🏗️ Architecture	1/20	Minor naming convention alignment, no structural or dependency changes
⚙️ Implementation	1/20	Simple key rename, no algorithms or control flow
⚠️ Risk	4/20	Silent UI regression risk if consumer code not updated; old keys removed without aliasing; no rollback complexity
✅ Quality	2/15	No tests needed for i18n keys, but PR appears incomplete without consumer code updates
🔒 Perf / Security	0/5	Not applicable for i18n key renaming

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