settings: Rename user_display_settings to user_preferences.

[Jai0401]

Finished renaming user_display_settings to user_preferences.

Fixes part of zulip#26874.

this pull request:

Renames user_display_settings to user_preferences.

Changed Files: web/src/server_events_dispatch.js web/src/settings_config.ts web/templates/settings/display_settings_general.hbs web/templates/settings/display_settings_information.hbs

Self-review checklist

• [x] Self-reviewed the changes for clarity and maintainability (variable names, code reuse, readability, etc.).

Communicate decisions, questions, and potential concerns.

• [ ] Explains differences from previous plans (e.g., issue description).
• [ ] Highlights technical choices and bugs encountered.
• [ ] Calls out remaining decisions and concerns.
• [ ] Automated tests verify logic where appropriate.

Individual commits are ready for review (see commit discipline).

• [x] Each commit is a coherent idea.
• [x] Commit message(s) explain reasoning and motivation for changes.

Completed manual review and testing of the following:

• [ ] Visual appearance of the changes.
• [ ] Responsiveness and internationalization.
• [ ] Strings and tooltips.
• [ ] End-to-end functionality of buttons, interactions and flows.
• [x] Corner cases, error conditions, and easily imagined bugs.

[alya]

@sahil839 are you up for reviewing this one?

[sahil839]

Looks good to me. @timabbott ready for your review.

[timabbott]

Merged, thanks @Jai0401!

It looks like there's still a cluster of template files to rename visible via ls web/templates/settings/*display_settings*; one will need to be careful to update how they're included via handlebars partials for that.