Two changes addressing agent context visibility and error recovery:
1. Enable DOGFOOD_FLAGS in oss.rs — this activates AgentViewBlockContext,
which auto-attaches user-executed command output (stdout/stderr/exit code)
to the AI conversation context. Previously the LLM was blind to any
commands the user ran via `!` prefix in agent view.
2. Add instant "Fix this error" prompt suggestion when a user-run command
fails (non-zero exit) in agent view. This lets users hand off errors to
the agent with one click instead of manually copy-pasting output.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
