[BUG] Dropbox sync fails if script has an emoji (e.g. 🚧) in title

[huyz]

Sequence of actions:

1. Rename a script and add the emoji 🚧 to it
2. Sync via Dropbox

Problem:

Settings page says Sync failed!

Background page console says:

index.js:1 Upload script: greasyfork.org-0aGoogle-20Calendar-20-2d-20Dark-20Night-20Mode-20Theme-20-2d-20first-20login-20🚧-0a
index.js:1 
 POST https://content.dropboxapi.com/2/files/upload 409 (Conflict)
index.js:1 Failed syncing: Dropbox

{error_summary: 'path/malformed_path/.', error: {…}}
409
"https://content.dropboxapi.com/2/files/upload"

Expected result:

When I rename the script and remove the emoji, the sync succeeds and the Background page console says:

Upload script: greasyfork.org-0aGoogle-20Calendar-20-2d-20Dark-20Night-20Mode-20Theme-20-2d-20first-20login.-20[WIP]-0a

with no error message

Environment:

• OS: macOS 14.4.1 23E224 (Sonoma) (Apple M1 Max, arm64)
• Browser: Brave Version 1.65.114 Chromium: 124.0.6367.60 (Official Build) (arm64)
• Violentmonkey Version: v2.18.0

[tophf]

@gera2ld, the fix is arguably to add u to escRE flags in

violentmonkey/src/background/sync/dropbox.js

Line 15 in 586ba58

const escRE = /[\u007f-\uffff]/g; // eslint-disable-line no-control-regex

Although maybe not, because it preserves the emoji, so maybe we should process the surrogate pairs manually?