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Description
This PR improves the UX when navigating between different diagrams in a project.

Previously, the ElementsPanel (the project tree on the left) only highlighted a diagram if it was explicitly clicked with the mouse. If the user switched tabs via the central ProjectView (e.g., clicking the tabs directly or using PageUp/PageDown), the tree selection remained static and lost sync with the currently active view.

This patch connects the diagramActivated signal from the ProjectView to the ElementsPanel, ensuring the tree automatically highlights the currently active diagram whenever the view changes.

Technical Changes
To allow the QetDiagramEditor to update the tree selection:

Changed elements_panel in ElementsPanelWidget from private to public.
Changed getItemForDiagram() in GenericPanel from protected to public.
Added a lambda connection in qetdiagrameditor.cpp (right after the ProjectView creation) to retrieve the QTreeWidgetItem for the activated diagram and call setCurrentItem().
Testing
Compiled and tested locally.
Verified that switching tabs with the mouse updates the tree.
Verified that switching tabs via keyboard shortcuts (PageUp/PageDown) correctly updates the tree selection.

Hi team,
I added a new feature to export a wiring list directly to CSV.
It uses the toXml() method to grab the project data directly from RAM, so no manual autosave is required before exporting.
Features:
Exports Folio, Element labels, Terminals, and conductor properties.
Resolves links across folios.
Removes duplicates.
Best regards!

This Pull Request introduces a new feature for the automatic numbering of terminals across an entire project. This tool significantly speeds up the workflow when dealing with large terminal blocks, replacing manual labeling or external scripts.
Integrated GUI: A new dialog (TerminalNumberingDialog) allows users to choose between X-axis or Y-axis priority for sorting.

Smart Sorting: Terminals are sorted by their prefix, then by folio index, and finally by their physical coordinates on the diagram (with a 1px tolerance for alignment).

Alphanumeric Support: Users can choose to include or exclude alphanumeric suffixes.

Preservation of Special Terminals: Standard terminal labels like "N", "PE", or "L1" are preserved to maintain electrical correctness, while still being counted in the sequence to ensure correct numbering for subsequent terminals.

Full Undo/Redo Support: The numbering process is encapsulated in a QUndoCommand macro, allowing users to revert all changes with a single "Undo" action.

This PR introduces a new feature to QElectroTech: Templates (user-defined reusable component groups/snippets). To provide a clean user experience, a dedicated "Templates" tab has been added to the element collection widget alongside the existing collections.

Currently, this is a Draft / WIP to gather early feedback on the architectural integration and the general concept before polishing the remaining features.

I would love to get your thoughts on the general approach and the UI/Model integration so far. Are there any specific architectural guidelines I should keep in mind before proceeding with the remaining To-Dos?

Hi Laurent,
I hope this solves the problem.

Safe List Iteration: Implemented safeDiagrams (a local copy of the selection) in QETDiagramEditor to prevent iterator invalidation while the project tree structure changes during bulk operations.

UI Stability & Database Sync: Added QCoreApplication::processEvents(QEventLoop::ExcludeUserInputEvents) within move loops. This ensures the database and UI remain synchronized, preventing the application from freezing or throwing SQL errors during bulk moves.

Directional Logic for Moves: Fixed move order logic (Forward loop for "Up", Backward loop for "Down" and "UpTop") to preserve the relative order of selected items.

Fixed Large Moves (x10 / x100): Repaired the logic for moving blocks over 10 and 100 pages. Applied the same safety loops and corrected boundary checks (using >= instead of >) to allow moves when exactly 10 or 100 pages are available.

Multi-Delete Support: Integrated and stabilized the ability to delete multiple selected diagrams at once, ensuring the UI updates correctly and the internal project model remains consistent.

Selection Persistence: Updated ElementsPanelWidget to clear and restore the selection after an operation. This prevents the tree view from incorrectly expanding the selection to unselected items between moved or deleted blocks.

Enhanced Safety & Validation:

Updated updateButtons() to calculate the boundary (min/max index) of the entire selection. Actions (including Delete and all Move types) are now correctly disabled if any part of the selection reaches the project boundaries.

Updated keyPressEvent() to respect these enabled/disabled states, preventing illegal move or delete operations via keyboard shortcuts (Delete, F3-F9).

This project provides a systematic Chinese localization enhancement for the QElectroTech element library.

[Core Feature: Directory-as-Context]
Driven by the Yingkou Lingbao New Materials technical team, this localization employs "path-context-aware" logic:

Semantic Alignment: By modeling filenames based on their directory hierarchy, we ensure high accuracy for technical terms within their specific engineering domains.

Full Coverage: Both .elmt and qet_directory files have been synchronized, enabling seamless Chinese navigation.

[Disclaimer & Feedback]
Given the vast scale of the library, there may still be room for optimization in certain niche terms. We welcome any corrections or feedback from the open-source community.

Contributor: 营口菱宝新材料有限公司 (Yingkou Lingbao New Materials Co., Ltd.)