Redesigned citation review panel for Office add-ins and workpaper navigation fixes

Citation details now appear in a docked bottom panel below the document viewer, so the source document and your review notes are visible at the same time. Toggle the panel open or closed with a button in the pane controls, drag the divider to adjust its height, and the add-in remembers your preference across sessions. The panel works the same way in both Excel and Word.
Validate and Flag are now available directly in the panel — no need to reach for the ribbon for single-citation verdicts. Unreviewed citations show Validate and Flag buttons in the bottom panel; once a verdict is set, the button becomes a status badge (Validated / Flagged) with a one-click clear option. The ribbon Review group still handles bulk selections in Excel.
New Settings button (gear icon) in the ribbon lets you re-link a bound workbook or Word document to a different engagement or task without closing the pane. Use the familiar cascading picker to select or create a client, engagement, or task.
Sign-in is more reliable. If Microsoft's authentication flow takes an unusual path, the add-in now detects the completed sign-in and returns to the pane automatically rather than appearing stuck. If the pane ever lands on the wrong page, clicking any ribbon button brings it back immediately.

Clicking a cell now opens the correct source document. The document viewer opens to the file where the cell's primary citation is highlighted — not to a fallback file that may have nothing to do with that cell's evidence. Citations that reference a file from a different part of the engagement also load correctly.
The collapse/expand arrow on datasource column groups now points in the correct direction after each click.