chore: Remove straggling mentions of prettier (#12907)

AGENTS.md

@@ -9,7 +9,7 @@ There is a web client which is fully responsive and works on mobile devices.
 - **`shared/`** - Shared TypeScript types, utilities, and editor components
 - **`plugins/`** - Plugin system for extending functionality
 - **`public/`** - Static assets served directly
-- **Various config files** - TypeScript, Vite, Vitest, Prettier, Oxlint configurations
+- **Various config files** - TypeScript, Vite, Vitest, oxfmt, Oxlint configurations
 
 Refer to /docs/ARCHITECTURE.md for detailed architecture documentation.
 
@@ -33,7 +33,7 @@ You're an expert in the following areas:
 - Critical – Do not create new markdown (.md) files.
 - Use early returns for readability.
 - Emphasize type safety and static analysis.
-- Follow consistent Prettier formatting.
+- Follow consistent oxfmt formatting.
 - Do not replace smart quotes ("") or ('') with simple quotes ("").
 - Do not add translation strings manually; they will be extracted automatically from the codebase.
 
@@ -175,7 +175,7 @@ yarn test:shared   # All shared code tests
 ## Code Quality
 
 - Use Oxlint for linting: `yarn lint`
-- Format code with Prettier: `yarn format`
+- Format code with oxfmt: `yarn format`
 - Check types with TypeScript: `yarn tsc`
 - Pre-commit hooks run automatically via Husky.
 - Fix linting issues before committing.

README.md

@@ -12,7 +12,6 @@
 </p>
 <p align="center">
   <a href="http://www.typescriptlang.org" rel="nofollow"><img src="https://img.shields.io/badge/%3C%2F%3E-TypeScript-%230074c1.svg" alt="TypeScript"></a>
-  <a href="https://github.com/prettier/prettier"><img src="https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat" alt="Prettier"></a>
   <a href="https://github.com/styled-components/styled-components"><img src="https://img.shields.io/badge/style-%F0%9F%92%85%20styled--components-orange.svg" alt="Styled Components"></a>
   <a href="https://translate.getoutline.com/project/outline" alt="Localized"><img src="https://badges.crowdin.net/outline/localized.svg"></a>
 </p>

docs/ARCHITECTURE.md

@@ -1,6 +1,6 @@
 # Architecture
 
-Outline is composed of a backend and frontend codebase in this monorepo. As both are written in TypeScript, they share some code where possible. We utilize the latest ES6 language features, including `async`/`await`, and types. Prettier formatting and Oxlint are enforced by CI.
+Outline is composed of a backend and frontend codebase in this monorepo. As both are written in TypeScript, they share some code where possible. We utilize the latest ES6 language features, including `async`/`await`, and types. oxfmt formatting and Oxlint are enforced by CI.
 
 ## Frontend