[FR] Web-UI & Markdown-File

### Description

Suggestion to Improve AppFlowy Self-Hosted Web UI
What this is about

In a self-hosted setup with a custom domain, AppFlowy already worked well on desktop and iOS, and sync between those clients was working reliably. The main problems appeared in the Web UI, which currently feels much less mature than the desktop and mobile apps.
What was observed

The instance itself was reachable through the domain, HTTPS, and tunnel setup. The admin console was also reachable through the domain and could be used at least partially.

However, several problems appeared in the Web UI:

Login through the Web UI was not stable and often ended in a loop back to the login page.

The admin console and the actual AppFlowy Web app did not feel well connected, especially when moving from the admin area into the Web app.

The message “No access to this page” and “This workspace doesn't have a default published page” was confusing and did not really help with troubleshooting.

In self-hosted mode, /web did not clearly feel separated between “normal web app” usage and “publish to web / website” usage.

Why this is a problem

From a self-hoster’s perspective, if desktop and iOS already work with the same cloud instance, the Web UI is expected to work in a similar way. In this case, desktop and iOS worked, but the Web UI still had login and access problems.

This is frustrating because it makes users assume their setup is wrong, even when the main issue seems to be the current state of the Web UI itself.
Request to the AppFlowy team

The self-hosted Web UI would benefit a lot from further development and stabilization. From a user perspective, these areas seem especially important:

Web login should work reliably and should not fall into login loops.

The admin console and the Web app should work together more smoothly, so moving between them feels consistent and stable.

Error messages should be clearer and explain whether the problem is about login, workspace setup, published pages, or missing configuration.

The difference between the normal Web app and the publish-to-web feature should be explained more clearly or handled better in the product itself.

In short

The self-hosted Web UI currently does not feel as polished or reliable as the desktop and iOS apps. For users who want to rely on their own AppFlowy Cloud setup every day, it would be very helpful if the Web UI was improved further, especially around login, session handling, routing, and general clarity.

It would also be great if, in the self-hosted version, you could find the notes and documents as Markdown files in the NAS directory. Services can sometimes go down for various reasons, and you might need to access your documents.

### Impact

All self-host users. Self-hosting is becoming an increasingly significant part of people’s lives worldwide, and more and more people are getting into it; I’ve recently started doing it myself, as data privacy is extremely important.

Self-host users would appreciate it if the web UI worked properly when they want to access the service from external devices (e.g. at work) and don’t want to – or often can’t – download a desktop app specifically for this purpose. For example, I work remotely a lot and in the office

The Markdown file would be a valuable addition for any user of Appflowy, as nobody wants to voluntarily give up access to their own data.

### Additional Context

_No response_