Clean up planning/state docs for next milestone and re-scope todo to drawer-native file tree migration

[Copilot]

This update addresses the request to make project state documentation lean before starting the next UI milestone. It removes stale historical blockers and aligns the active plan around moving file browsing into the side panel drawer.

• Problem alignment

  • Cleans up todo.md and current_status.md so they reflect the current SAF/Okio architecture state, not resolved historical issues.
  • Re-scopes immediate work toward drawer-native recursive file tree + drag-and-drop, and deprecates the standalone file-browser path in planning.

• Documentation updates

  • plan/todo.md
    • Marks core file I/O as completed (SAF root selection, recursive scan, Okio read/write, note creation).
    • Splits out upcoming milestones into explicit actionable items:
      • drawer-integrated file tree (global access, infinite depth, scrollable)
      • drag-and-drop move interactions in drawer tree
      • removal of standalone FileBrowserScreen navigation
  • current_status.md
    • Rewritten as a clean architecture snapshot:
      • DataStore-persisted SAF root
      • repository-driven recursive tree
      • Okio-backed file read/write and note creation
    • Sets immediate next step to implementing drawer-native tree + SAF-reactive DnD moves and removing separate file-browser route.

• Plan clarity example

  - [ ] Move file tree into side panel drawer (global access, expandable infinite-depth hierarchy, scrollable section).
  - [ ] Add drag-and-drop file/folder move interactions inside the drawer tree (reactive SAF disk updates).
  - [ ] Remove standalone `FileBrowserScreen` navigation and keep file browsing as a persistent drawer feature.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• dl.google.com
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java /usr/lib/jvm/temurin-17-jdk-amd64/bin/java --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.lang.invoke=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED --add-exports=jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED --add-exports=jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED --add-opens=java.base/java.nio.charset=ALL-UNNAMED --add-opens=java.base/java.net=ALL-UNNAMED --add-opens=java.base/java.util.concurrent=ALL-UNNAMED --add-opens=java.base/java.util.concurrent.atomic=ALL-UNNAMED --add-opens=java.xml/javax.xml.namespace=ALL-UNNAMED --add-opens=java.base/java.time=ALL-UNNAMED -Xmx2048m -Dfile.encoding=UTF-8 -Duser.country -Duser.language=en -Duser.variant (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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