Fix the issue where CSV export/import creates nested root groups when the database has a custom root group name.
Added comprehensive tests to verify the fix works for both custom and default root group names, and preserves existing behavior for single-level groups.
Implement heuristic approach for CSV import root group detection:
- Analyzes all CSV rows before processing to find consistent first path components
- Only skips the first component if it appears in 80% or more of paths
- Handles absolute paths (starting with "/") by ignoring them in analysis
- Preserves existing behavior when no clear common root is found
Co-authored-by: droidmonkey <2809491+droidmonkey@users.noreply.github.com>
The Database, DatabaseWidget, and DatabaseTabWidget classes share many responsibilities in inconsistent ways resulting in impenetrable and unmaintainable code and a diverse set of bugs and architecture restrictions. This patch reworks the architecture, responsibilities of, and dependencies between these classes.
The core changes are:
* Move loading and saving logic from widgets into the Database class
* Get rid of the DatabaseManagerStruct and move all the information contained in it into the Database
* Let database objects keep track of modifications and dirty/clean state instead of handing this to external widgets
* Move GUI interactions for loading and saving from the DatabaseTabWidget into the DatabaseWidget (resolves#2494 as a side-effect)
* Heavily clean up DatabaseTabWidget and degrade it to a slightly glorified QTabWidget
* Use QSharedPointers for all Database objects
* Remove the modifiedImmediate signal and replace it with a markAsModified() method
* Implement proper tabName() method instead of reading back titles from GUI widgets (resolves#1389 and its duplicates #2146#855)
* Fix unwanted AES-KDF downgrade if database uses Argon2 and has CustomData
* Improve code
This patch is also the first major step towards solving issues #476 and #2322.
