fix: show paused status when account has no sync sources

[Rello]

Motivation

• The tray window incorrectly displayed “All synced!” for a connected account that had no configured sync folders and no enabled VFS/File Provider, while the tray icon correctly showed the pause state.

Description

• Add hasConfiguredSyncSource() helper to detect whether the current account has any configured sync folder or an enabled File Provider/VFS domain (guarded by BUILD_FILE_PROVIDER_MODULE).
• Update setSyncStateToConnectedState() to show “Sync paused” with the pause icon when the account is connected but has no configured sync source instead of reporting “All synced!”.
• Restrict the initial sync-state evaluation in initSyncState() to only process folders that belong to the active account to avoid unrelated folders affecting the tray summary.
• Modified file: src/gui/tray/syncstatussummary.cpp.

Testing

• Attempted to build the macOS target with xcodebuild build -target NextcloudDev, but the command failed in this environment because xcodebuild is not available (bash: command not found: xcodebuild).
• No other automated test runs were executed in this environment.

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Codex Task

[Rello]

Account is connected, but no folder sync nor VFS is enabled. the status is wrong

[github-actions]

Artifact containing the AppImage: nextcloud-appimage-pr-9473.zip

Digest: sha256:e4d4c37a91b7c8961c0fb7d262d140756bbf0b3bd2e9ccd6d49b3495e8c6c9f3

To test this change/fix you can download the above artifact file, unzip it, and run it.

Please make sure to quit your existing Nextcloud app and backup your data.

[sonarqubecloud]

Quality Gate failed

Failed conditions
0.0% Coverage on New Code (required ≥ 80%)
3 New Code Smells (required ≤ 0)

See analysis details on SonarQube Cloud

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