P0 Fixes:
- Enable toml `preserve_order` feature for reliable key ordering
- Extract pure detection functions to utils/commonConfigDetection.ts (fix layer inversion)
- Return structured result from preserveCodexConfigFormat to prevent data loss
P1 Fixes:
- Handle pure TOML strings in Codex config instead of silent skip
- Surface extractDiff errors in useCodexCommonConfig instead of swallowing
- Log parse errors in detectCommonConfigEnabledByContent for debugging
P2 Fixes:
- Use parsing-based assertions in Rust TOML ordering tests
- Add schema warning when Codex config field is wrong type
- Add depth/node limits to isSubset function (prevent stack overflow)
- Replace hardcoded "{}" check with adapter.hasValidContent()
P3 Fixes:
- Refactor Gemini errors to structured GeminiConfigErrorInfo format
- Add mapGeminiErrorToI18n for type-safe error-to-i18n mapping
- Add hasContent method to CommonConfigAdapter interface
- Move isSubset utility to configMerge.ts for reuse
- Export preserveCodexConfigFormat from adapters for hook use
- Add hasContentByAppType dispatcher for unified content detection
- Remove dead code from providerConfigUtils (hasCommonConfigSnippet,
hasTomlCommonConfigSnippet, hasGeminiCommonConfigSnippet)
- Fix backfill pollution: extract custom config from live when common config enabled
- Fix proxy backup: merge common config before backup to preserve full config
- Unify null override semantics: null no longer overrides in both frontend and backend
- Add missing i18n keys for common config UI
- Hide format button in readonly JsonEditor
- Add mapGeminiWarningToI18n for user-friendly warning messages
Add comprehensive config merge utilities for both Rust backend and TypeScript frontend
to support the new common config architecture where customConfig overrides commonConfig.
Backend (Rust):
- Add config_merge.rs module with JSON and TOML merge functions
- Support deep merge where source overrides target for nested objects
- Add extract_difference functions to identify custom-only keys
- Include compute_final_*_config functions for runtime merge calculation
- Register module in lib.rs
Frontend (TypeScript):
- Add configMerge.ts with isPlainObject, deepClone, deepEqual, deepMerge utilities
- Implement computeFinalConfig for merging common + custom configs
- Add extractDifference to identify keys unique to live config
- Add tomlConfigMerge.ts with TOML-specific merge/extract functions
- Use smol-toml for parsing and serialization
These utilities form the foundation for the refactored common config system
where providers store only custom config and merge with shared templates at runtime.
YoVinchen