Add folder management UI with hierarchical navigation drawer and ManageFolders screen

[Copilot]

Implements the folder management system described in the interface spec: navigation drawer with expandable folder hierarchy, dedicated folder management screen with edit mode, and folder creation dialog with color picker.

Domain & Data

• Folder model (@Serializable) with id, name, color, parentId, order, noteCount — supports nested hierarchies
• StoragePreferences extended with folder CRUD (JSON-serialized to DataStore) and trash note tracking
• FolderColors — 11 predefined color swatches matching the spec

FolderViewModel

• Full folder lifecycle: create, rename, delete (cascading to descendants), reorder, move, batch color
• Multi-select edit mode with selectedFolderIds / isEditMode state
• Circular reference protection on moveFolder/moveFolders — validates target is not a descendant
• Tree helpers: getRootFolders, getChildFolders, countNotesInSubtree

UI Changes

• DashboardScreen drawer redesigned: All notes → Trash → divider → expandable Folders section with note count badges → "Manage Folders" pill button. Settings gear replaces close button. Chevron expand uses IconButton to isolate click from row tap.
• DashboardScreen main: title → "All notes", FAB → circular with Edit icon, added MoreVert action, empty state shows "No notes" / "Tap the button below to create a note"
• ManageFoldersScreen (new): folder tree in rounded card, indent by depth, chevron + reorder handle per row. Edit mode swaps handles for checkboxes, shows bottom action bar (Move, Create sub…, Folder color, Rename, Delete). "Create folder" row with green + at bottom.
• CreateFolderDialog: text input + horizontally scrollable color swatch row with checkmark selection

Navigation & DI

• Screen.ManageFolders route added to NavGraph
• FolderViewModel registered in Koin appModule
• DashboardScreen takes onOpenManageFolders callback

Tests

• 10 unit tests covering Folder serialization round-trips, hierarchy filtering, descendant collection, and FolderColors configuration

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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