aisman

Session 132, Step 5: Implement in-browser server file/folder picker modal (replace disabled native dialog)
- AIM-2453 Implement in-browser server file/folder picker modal (replace disabled native dialog)
- AIM-2463 Fix incorrect processing times in output files (end before start)
- AIM-2464 Fix step.agent from 'Claude Sonnet 3.5' to 'DeepSeek V4 Pro'
- AIM-2465 Generate SQL update script for SessionStep durations
- AIM-2466 Fix validateOutputFile to catch end-before-start timing errors
- AIM-2467 Fix loadInstructions to never call server for project files