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.

server/src/routes/case_actions.rs

@@ -2,9 +2,8 @@ use std::path::{Path, PathBuf};
 use std::sync::Arc;
 use std::time::SystemTime;
 
-use askama::Template;
 use axum::extract::State;
-use axum::response::{Html, Redirect};
+use axum::response::Redirect;
 use time::OffsetDateTime;
 use time::format_description::well_known::Rfc3339;
 use tokio::io::AsyncWriteExt;
@@ -22,13 +21,6 @@ use crate::error::AppError;
 use crate::paths::{DELETE_MARKER, DeleteMarker, read_delete_marker, write_delete_marker};
 use crate::routes::user_web::locate_case_or_404;
 
-#[derive(Template)]
-#[template(path = "document.html")]
-struct DocumentTemplate {
-    case_id: String,
-    content: String,
-}
-
 /// POST /web/cases/{case_id}/analyze
 ///
 /// Trigger an LLM analysis for the case. If no document exists yet, writes
@@ -87,32 +79,6 @@ pub async fn handle_analyze_case(
     Ok(Redirect::to("/web/cases"))
 }
 
-/// GET /web/cases/{case_id}/document
-///
-/// Render the latest `document_v{N}.md` for the case. The handler scans the
-/// case directory and picks the highest N — no symlink, no separate pointer.
-pub async fn handle_document_view(
-    user: AuthenticatedWebUser,
-    State(config): State<Arc<Config>>,
-    CaseIdPath(case_id): CaseIdPath,
-) -> Result<Html<String>, AppError> {
-    let user_root = config.data_path.join(&user.slug);
-    let case_dir = locate_case_or_404(&user_root, &case_id, &user.slug, "document view").await?;
-
-    let md = read_document(&case_dir)
-        .await
-        .ok_or_else(|| AppError::NotFound("Noch kein Dokument erzeugt".into()))?;
-    let content = crate::analyze::render::md_to_html(&md);
-
-    DocumentTemplate {
-        case_id: case_id.to_string(),
-        content,
-    }
-    .render()
-    .map(Html)
-    .map_err(|e| AppError::Internal(format!("Template render failed: {e}")))
-}
-
 /// Build an `AnalysisInput` for the given case directory.
 /// Collects all `.m4a` (excluding `.m4a.failed`), reads the matching
 /// `.transcript.txt` for each, skips blank transcripts, and computes