[tombell]

Restoring the exact last valid configuration after an invalid edit left the reload error reported. Move the change check into the configuration store so restoration clears the error and runtime overrides, while unchanged files preserve overrides.

Simplify queued runtime updates, remove unused border state, shorten internal and test names, and apply declaration ordering and statement spacing. Remove a duplicate socket round-trip test, three JSONC syntax cases covered by the shared package, and a redundant immutability assertion. Condense the internal documentation and distinguish current behavior from remaining validation work.

Validation:

• Strict formatting and whitespace checks passed.
• All 37 Swift tests passed, including regression coverage for watched reload recovery.
• CLI version and example configuration validation passed.
• A temporary live daemon with borders disabled passed startup, queries, unchanged-file override preservation, invalid-edit recovery, restoration of identical valid contents, and stop/socket cleanup checks.

Desktop rendering transitions were not rerun.