Disk-mounted folders on desktop and improved folder management (#7502)

Description of Changes

Adds folder kinds so the file manager can work with real directories on
disk.

Desktop
- New folder is now a menu with two options: "Add local folder" and "New
folder on the server".
- Add local folder opens the native picker and mounts a directory. Files
are listed straight from disk, nothing is copied in.
- Subfolders show inside a mount and open like any folder. New folder
inside a mount creates a real directory on disk.
- Moving, dropping or uploading files into a mount writes them to the
directory. The app copy is only removed after the write succeeds. Name
clashes get a " (2)" suffix.
- Mounted files get thumbnails.
- Adding the same directory twice just returns the existing mount.
- Removing a mount never touches the disk.
- The server option is disabled in local mode with a sign in message.

Web + desktop
- Uploading or dropping files while inside a folder puts them in that
folder instead of Local.
- Files can be dragged onto folders in the grid and the tree to move
them.
- Folders show an origin badge (cloud or local).
- The Local view now means files that are not in any folder.

Follow ups for a future pr
- Mount listing cap: large directories currently show the 500 most
recent files with no notice. Will be removed as part of the
virtualisation/performance PR.
- Folders within folders need to be supported
- Symlinks in mounts: currently not listed. Behaviour to be decided
alongside the wider folder work.

Author: reecebrowne

.gitignore

@@ -312,3 +312,4 @@ docs/type3/signatures/
 
 # Local screenshot artifacts from *-screenshots.spec.ts
 frontend/editor/screenshots/
+frontend/editor/src-tauri/libs/.variant

frontend/editor/public/locales/en-US/translation.toml

@@ -4321,7 +4321,8 @@ download = "Download"
 downloadAll = "Download all"
 downloadVersion = "Download this version"
 dropOverlay = "Drop files to upload"
-dropOverlaySub = "Files start in Local. Use 'Move to' or 'Save to cloud' to organize them into a folder."
+dropOverlaySub = "Files land in Local. Organize them into folders any time."
+dropOverlaySubFolder = "They'll be added to this folder."
 duplicate = "Duplicate"
 file = "File"
 fileInfo = "File info"
@@ -4334,19 +4335,27 @@ inPath = "in {{path}}"
 inWorkspace = "Open"
 inWorkspaceAria = "Already in workspace"
 loading = "Loading…"
-localFoldersUnavailable = "Folders are cloud-only - save a file to the cloud to organize it."
+localFolderManagedByDisk = "This folder is managed by its directory on disk."
+moveAcrossKindsBlocked = "These folders live in different places, so one can't go inside the other."
+moveIntoMountCloudSkipped_one = "{{count}} server file stayed in your files. It lives on the server, not on this disk."
+moveIntoMountCloudSkipped_other = "{{count}} server files stayed in your files. They live on the server, not on this disk."
+moveIntoMountFailed_one = "{{count}} file could not be written into the folder."
+moveIntoMountFailed_other = "{{count}} files could not be written into the folder."
+moveIntoVirtualCloudSkipped_one = "{{count}} server file was left in place. Server files can't live in browser-only folders."
+moveIntoVirtualCloudSkipped_other = "{{count}} server files were left in place. Server files can't live in browser-only folders."
 moveSkippedRemote_one = "{{count}} file couldn't be moved on the server (no permission or already deleted)."
 moveSkippedRemote_other = "{{count}} files couldn't be moved on the server (no permission or already deleted)."
 moveTo = "Move to…"
 newFolder = "New folder"
-newFolderStorageDisabled = "Server folder storage isn't enabled. Ask your admin to turn it on."
+newFolderStorageDisabled = "Server folder storage isn't enabled."
 newFolderTabUnavailable = "Switch to All or Cloud to create folders."
 offlineNoFolderEdits = "Server folder sync unavailable - folder changes are disabled. Check sign-in and storage configuration."
 open = "Open"
 openVersionInWorkspace = "Open in workspace"
 originFilter = "Filter by source"
 refresh = "Refresh from server"
 remove = "Delete"
+removeLocalFolder = "Remove (files stay on disk)"
 removeVersion = "Remove this version"
 rename = "Rename"
 renamed = "Renamed"
@@ -4359,6 +4368,7 @@ selectAll = "Select all"
 selectAllHint = "Click to select all. Tip: hold Ctrl (or Cmd) to add files one at a time, Shift to select a range."
 selectedCount = "{{count}} selected"
 selectFile = "Select file {{name}}"
+serverFolderNeedsConnection = "Sign in to Stirling Cloud or connect a self-hosted server to use server folders."
 shareDisabledHint = "File sharing isn't enabled on this server. Ask your admin to enable it."
 shareManage = "Manage sharing"
 showDetails = "Show details"
@@ -4367,7 +4377,6 @@ summary_one = "{{count}} item"
 summary_other = "{{count}} items"
 tree = "Folders"
 upload = "Upload"
-uploadedToLocal = "Uploaded files start in Local. Use 'Save to cloud' to put them in a folder."
 uploadFromMobile = "Upload from Mobile"
 versionActions = "Version actions"
 versionCollapse = "Collapse middle versions"
@@ -4433,6 +4442,8 @@ title = "You haven't shared any files yet"
 [filesPage.error]
 actionFailed = "Could not {{action}}."
 actionFailedDetail = "Could not {{action}}: {{message}}"
+addFolderFailed = "Could not add the folder."
+addFolderFailedDetail = "Could not add the folder: {{message}}"
 cloudDeleteFailed_one = "Couldn't delete 1 file from the cloud."
 cloudDeleteFailed_other = "Couldn't delete {{count}} files from the cloud."
 deleteFolderFailed = "Could not delete folder."
@@ -4445,8 +4456,14 @@ moveFilesFailed = "Could not move files."
 moveFilesFailedDetail = "Could not move files: {{message}}"
 moveFolderFailed = "Could not move folder."
 moveFolderFailedDetail = "Could not move folder: {{message}}"
+openDiskFileFailed = "Could not open {{name}}."
+openDiskFileFailedDetail = "Could not open {{name}}: {{message}}"
+readFolderFailed = "Could not read the folder."
+readFolderFailedDetail = "Could not read the folder: {{message}}"
 removeFilesFailed = "Could not remove files."
 removeFilesFailedDetail = "Could not remove files: {{message}}"
+removeFolderFailed = "Could not remove folder."
+removeFolderFailedDetail = "Could not remove folder: {{message}}"
 uploadFilesFailed = "Could not upload files."
 uploadFilesFailedDetail = "Could not upload files: {{message}}"
 
@@ -4466,12 +4483,21 @@ activeCount = "{{count}} filters active"
 clearAll = "Clear filters"
 label = "Filters"
 
+[filesPage.folderKind]
+local = "Local folder"
+virtual = "Browser folder"
+
 [filesPage.folderName]
 cancel = "Cancel"
 error = "Could not save folder. Try again."
 label = "Folder name"
 placeholder = "Folder name"
 
+[filesPage.folderOrigin]
+diskHint = "A folder mounted from a directory on your disk"
+serverHint = "A folder stored on the Stirling server"
+virtualHint = "A folder that lives only in this browser"
+
 [filesPage.moveDialog]
 cancel = "Cancel"
 confirm = "Move here"
@@ -4485,10 +4511,16 @@ newFolderPlaceholder = "Folder name"
 newFolderToggle = "Create new folder…"
 title = "Move to folder"
 
+[filesPage.newFolderMenu]
+addExisting = "Add local folder"
+server = "New folder on the server"
+serverHint = "Synced to your account, available wherever you sign in."
+
 [filesPage.origin]
 all = "All sources"
 cloud = "Cloud"
 cloudHint = "Stored on the Stirling server"
+diskHint = "A file in the mounted folder on your disk"
 local = "Local"
 localHint = "Only stored in this browser"
 shared = "Shared"

frontend/editor/src-tauri/capabilities/default.json

@@ -39,6 +39,18 @@
       "identifier": "fs:allow-read-file",
       "allow": [{ "path": "**" }]
     },
+    {
+      "identifier": "fs:allow-read-dir",
+      "allow": [{ "path": "**" }]
+    },
+    {
+      "identifier": "fs:allow-stat",
+      "allow": [{ "path": "**" }]
+    },
+    {
+      "identifier": "fs:allow-mkdir",
+      "allow": [{ "path": "**" }]
+    },
     {
       "identifier": "fs:allow-write-file",
       "allow": [{ "path": "**" }]