Refactor case detail into a dedicated page

This commit restructures the web interface for case details. The
previous `/web/cases/{case_id}` route, which previously showed both the
case summary and its recordings, has been split into two distinct pages:

- `/web/cases/{case_id}`: This page now displays the overall case
  information, including the document if available.
- `/web/cases/{case_id}/recordings`: This new page is dedicated to
  listing and displaying individual recordings within a case.

This change improves the organization and clarity of the web UI,
allowing for more focused views of case data. Additionally, the
`case_detail.html` and `document.html` templates have been removed as
their functionality is now handled by the new `case_page.html` and the
upcoming document rendering logic. The `cases.html` template has also
been removed, indicating a shift towards more granular page views.

scripts/dictate.sh

@@ -83,7 +83,7 @@ show_case() {
     fi
 
     echo
-    echo "Browse: $SERVER_URL/web/"
+    echo "Browse: $SERVER_URL/web/cases"
 }
 
 # Record + upload for the given case, then display the case state.