feat: modernize error page (#2949)

* can't figure this out!

* raise here so it gets picked up by exceptions

* add few more info for error rendering

* add a few more checks for browser

not fail safe just one more layer

* cleaner error display

... hopefully

* add go to extension

* keep buttons add go to extension

* feat: identify extensions that are not installed

* fix: status code

* fix: full path

* add account/logout button if 401

prevent getting stuck

* fix: ext access

* fix user button

* fix: 404 page

* fix: json 404 response

* fix: dumb rendering

* fix: `/api` request always json

* fix: extension api path

* test: check regtest

* test: investgate

* something made ws slower?

* fix: change error code

---------

Co-authored-by: Vlad Stan <stan.v.vlad@gmail.com>
Co-authored-by: dni ⚡ <office@dnilabs.com>
Co-authored-by: Arc <33088785+arcbtc@users.noreply.github.com>

lnbits/middleware.py

@@ -82,7 +82,11 @@ class InstalledExtensionMiddleware:
             return HTMLResponse(
                 status_code=status_code,
                 content=template_renderer()
-                .TemplateResponse(Request(scope), "error.html", {"err": msg})
+                .TemplateResponse(
+                    Request(scope),
+                    "error.html",
+                    {"err": msg, "status_code": status_code, "message": msg},
+                )
                 .body,
             )
 
@@ -114,7 +118,6 @@ class ExtensionsRedirectMiddleware:
 
 
 class AuditMiddleware(BaseHTTPMiddleware):
-
     def __init__(self, app: ASGIApp, audit_queue: asyncio.Queue) -> None:
         super().__init__(app)
         self.audit_queue = audit_queue