Store ReviewMode, DiffFrom, DiffTo, and DiffCommit in SessionHistory
and persist them to JSONL (conditionally, only when non-empty). Display
mode in viewer list page and show version details (from/to or commit)
on the session detail page based on review mode.
Make encodeRepoPath cross-platform by properly handling volume names, backslash separators, and drive letter colons. Add unit tests covering Unix, Windows, and edge-case inputs.
Re-location LLM calls were invisible in session history and their token
consumption was unaccounted for. Refactor the code_comment handling path
to record re-location requests/responses into session JSONL, accumulate
token usage into global counters, and display them in the viewer.
Also fixes: async context cancellation risk (WithoutCancel), duplicate
telemetry recording, missing timeout enforcement, missing {existing_code}
placeholder in the re-location prompt, and renames Parse to ParseComments
for clarity.
Unify the config folder name to `.opencodereview` across all runtime paths,
tests, docs, and i18n strings. Also make defaultConfigPath() return an error
instead of silently falling back to a current-directory file when $HOME is
unresolvable.