Add folder picker to the session toolbar

[ComputelessComputer]

The session toolbar now has a place to create and select folders, and the summary / memo / transcript tabs sit on the right next to the calendar control.

What changed

• Left toolbar: a folder picker plus the editable note title. Users can search existing folders, create a new one, or remove the note from its folder. Folders are a single level only — nested paths like work/meetings are rejected.
• Right toolbar: the summary / memo / transcript pill moves left of the calendar / meeting control, then share and overflow stay as they were.
• Folders are stored on the session as folder_path (already in SQLite). The picker lists distinct top-level names from existing notes. If a note already has a nested path, the picker shows the first segment and writing a folder flattens it.

Tests

• Folder path helpers (single-level normalize, nested reject, top-level listing)
• Folder picker select / create / remove / nested-name reject
• Title breadcrumb with picker
• View switcher placement next to the calendar control
• Existing header and note-input tab tests updated for the split components

  

[netlify]

✅ Deploy Preview for anarlog canceled.

Name	Link
🔨 Latest commit	75713cc
🔍 Latest deploy log	https://app.netlify.com/projects/anarlog/deploys/6a85e2e9952f1000081df660