Move all inline markup out of ui.rs into server/templates/:
styles.css — shared stylesheet
index.html — dashboard page
app_detail.html — app detail page
users.html — users admin page
Templates are embedded at compile time via include_str! and rendered
with simple str::replace("{{placeholder}}", value) calls. JS/CSS
braces no longer need escaping, making the templates editable with
normal syntax highlighting.
https://claude.ai/code/session_01FKCW3FDjNFj6jve4niMFXH
