Problem
On the Proton Mail iOS app, emails that use a small font are hard to read. The only workaround is pinch-to-zoom with two fingers. The text does get bigger, but then I can no longer move around within the email: when I try to pan to the right to read the rest of a line, the app moves the whole view instead (swiping to the next/previous email or triggering navigation), so the zoomed content is unusable.
Steps to reproduce

Open an email with small text on the iOS app.
Pinch to zoom in to enlarge the text.
Try to drag the zoomed content horizontally (e.g. to the right) to read a long line.
Instead of panning inside the email, the whole app view shifts/navigates away.

Expected behaviour
When zoomed in, I should be able to freely pan up/down and left/right within the email content, without the gesture triggering app-level navigation.
Feature request

Fix the panning bug so zoomed content can be moved in all directions.
Add a dedicated text-size / font-scaling setting for reading emails (independent of pinch-zoom), ideally with automatic reflow so lines wrap to the screen width and no horizontal scrolling is needed at all.

This would make small-font emails much easier to read on mobile and remove the frustrating navigation conflict.