# Auto-fill Equipment/Drawing from Export History

## Problem

When a SolidWorks file is opened that doesn't match the `DrawingInfo` regex (e.g., `Conveyor Frame.sldasm` instead of `5028 A02 Conveyor.slddrw`), the equipment and drawing number dropdowns are left empty even though the file may have been exported before with known values.

## Decision

- **Lookup key:** SolidWorks source file path (`ActiveDocument.FilePath`)
- **Storage:** Query the existing `ExportRecords` table (no new table or migration)
- **Priority:** Database lookup first; fall back to title regex parse if no history found

## Design

### Modify `UpdateActiveDocumentDisplay()` in `MainForm.cs`

When the active document changes:

1. Query the DB for the most recent `ExportRecord` where `SourceFilePath` matches `activeDoc.FilePath` (case-insensitive)
2. If found, parse the stored `DrawingNumber` via `DrawingInfo.Parse()` and auto-fill equipment/drawing dropdowns
3. If not found, fall back to current behavior: `DrawingInfo.Parse(activeDoc.Title)`

### What doesn't change

- No schema changes, no new migration
- Equipment/drawing dropdowns still populated with historical values in `InitializeDrawingDropdowns()`
- Export flow untouched

### Error handling

- DB query wrapped in try/catch so failures don't break the UI
- Case-insensitive path comparison (Windows paths are case-insensitive)