1. ArgumentList (fix injection): ClaudeArgsBuilder.Build() now returns
IReadOnlyList<string>; ClaudeProcess populates ProcessStartInfo.ArgumentList
instead of Arguments, so values like system prompts are never shell-split.
DailyPrepPrompt, RefinePrompt, and WeekReportService migrated similarly.
All IClaudeProcess fakes updated.
2. ContinueAsync exception guard: wrap RunOnceAsync in try/catch matching
the RunAsync pattern so an unexpected exception never leaves the task
stuck in Running status.
3. Planning chain cascade: OnChildFinishedAsync now calls CancelAsync on
the immediate blocked successor when a child fails or is cancelled,
triggering a recursive cascade that clears the entire remaining chain
instead of leaving it wedged.
4. FailAsync guard: restrict valid source states to Running and Queued;
WaitingForReview -> Failed is now rejected, preventing an invalid
transition that could corrupt the review workflow.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
