[FEATURE] Font size zoom inside the File viewer pane (source & preview modes)
Preflight Checklist
- [x] I have searched existing requests and this feature hasn't been requested yet
- [x] This is a single feature request (not multiple features)
Problem Statement
The File viewer pane (opened by clicking file links in assistant messages) has no font size control; Ctrl+= / Ctrl+- do not affect it. Reading long files or wide tables in it is hard. Related requests #69289 and #48841 (both closed as duplicates) were about panel/chat zoom - the File viewer pane specifically still has no zoom. Desktop v2.1.237, Windows 11.
Proposed Solution
Support Ctrl + = / Ctrl + - (Cmd on macOS) inside the File viewer, in both source and preview modes, and remember the chosen size.
Alternative Solutions
OS-level display scaling - affects everything, not just the viewer; window zoom changes the whole app.
Priority
Low - Nice to have
Feature Category
File operations
Use Case Example
- I open a markdown design doc from a file link; it renders as a preview with wide tables.
- The default size is too small to scan the table, so I read it in the terminal instead - defeating the point of the viewer.
- With Ctrl+= I would zoom the pane, read the table, and zoom back for code.
Additional Context
Filed alongside two companion requests about the same pane: markdown :line links, and keeping line position across the source/preview toggle.