/stop

Stop the interactive Flutter session and generate session notes file

<objective>
Stop the current interactive Flutter session and generate the session notes file.

**Outputs by session mode:**
- Debug session: `plan/sess-debug-MM-DD-HH-mm.md` - Issues with diagnostics and suggested fixes
- Dev session: `plan/sess-dev-MM-DD-HH-mm.md` - Requests and file changes

Use `--discard` ($ARGUMENTS contains "discard") to stop without generating the report.
</objective>

<context>
Current time: !`date "+%m-%d-%H-%M"`
Plan directory: !`ls -la plan/ 2>/dev/null | head -10 || echo "plan/ not found"`
</context>

<stop_protocol>
## Stopping the Session

**1. Stop the Flutte...