Plan scoped refactor: move file tree into Dashboard side panel (no DnD, no file moves)

[Copilot]

This PR narrows the work to a safe, incremental slice: relocate the existing recursive file tree into the DashboardScreen side panel, while explicitly deferring drag-and-drop and on-disk file move logic.
At this stage, the branch captures the implementation plan/status updates for that scoped UI migration.

• Scope reset for Divide-and-Conquer iteration

  • Added a dedicated iteration checklist to plan/todo.md for:
    • rendering file tree in drawer,
    • folder expand/collapse,
    • depth indentation,
    • file-open behavior parity,
    • removing standalone FileBrowserScreen routing.

• Current project-state tracking

  • Updated current_status.md with:
    • explicit in-scope vs out-of-scope boundaries for this PR step,
    • iteration context for the side-panel migration.

• Planned UI behavior (unchanged intent, now explicitly scoped)

  • Keep file open path identical (file click still opens editor).
  • Keep recursive tree model and folder expansion behavior.
  • Remove navigation dependency on standalone file browser screen once drawer tree is wired.

## Iteration: Move File Tree into Side Panel (2026-02-22)

- [ ] Move recursive file tree rendering into the Dashboard side panel with folder expand/collapse and indentation.
- [ ] Preserve file-open behavior so clicking a file still opens Editor.
- [ ] Remove standalone FileBrowser route/screen wiring from navigation.

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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