Add analysis preview to case list

Introduce a `preview_lines` setting in `users.toml` to control the
number of visible lines for the analysis preview in the case list. This
feature extracts the first paragraph of the `document.md` file, strips
markdown formatting, and displays it, capped by the configured
`preview_lines`. The actual line clamping is handled client-side via CSS
`line-clamp`.

server/tests/analyze_test.rs

@@ -33,6 +33,7 @@ fn make_user(slug: &str) -> User {
         whisper: Default::default(),
         retention: Default::default(),
         window_hours: 72,
+        preview_lines: 2,
     }
 }
 

server/tests/auth_test.rs

@@ -19,6 +19,7 @@ fn test_config() -> Arc<Config> {
             whisper: Default::default(),
             retention: Default::default(),
             window_hours: 72,
+            preview_lines: 2,
         }],
         api_keys: HashMap::from([("test-key-123".into(), "dr_test".into())]),
         ..Config::test_default()

server/tests/case_page_test.rs

@@ -25,6 +25,7 @@ fn make_user(slug: &str) -> User {
         whisper: Default::default(),
         retention: Default::default(),
         window_hours: 72,
+        preview_lines: 2,
     }
 }
 

server/tests/close_watermark_test.rs

@@ -25,6 +25,7 @@ fn make_user(slug: &str, password_plain: &str) -> User {
         whisper: Default::default(),
         retention: Default::default(),
         window_hours: 72,
+        preview_lines: 2,
     }
 }
 

server/tests/delete_recording_test.rs

@@ -25,6 +25,7 @@ fn make_user(slug: &str, password_plain: &str) -> User {
         whisper: Default::default(),
         retention: Default::default(),
         window_hours: 72,
+        preview_lines: 2,
     }
 }
 

server/tests/login_test.rs

@@ -16,6 +16,7 @@ fn make_user(slug: &str, password_plain: &str) -> User {
         whisper: Default::default(),
         retention: Default::default(),
         window_hours: 72,
+        preview_lines: 2,
     }
 }
 

server/tests/magic_link_test.rs

@@ -26,6 +26,7 @@ fn make_user() -> User {
         whisper: Default::default(),
         retention: Default::default(),
         window_hours: 72,
+        preview_lines: 2,
     }
 }
 

server/tests/oneliners_api_test.rs

@@ -30,6 +30,7 @@ fn test_config() -> (Arc<Config>, PathBuf) {
             whisper: Default::default(),
             retention: Default::default(),
             window_hours: 72,
+            preview_lines: 2,
         }],
         api_keys: HashMap::from([(TEST_KEY.into(), TEST_SLUG.into())]),
         ..Config::test_default()

server/tests/retention_sweep_test.rs

@@ -36,6 +36,7 @@ fn user_with_retention(slug: &str, auto_close_days: u32, auto_delete_days: u32)
             auto_delete_days,
         },
         window_hours: 72,
+        preview_lines: 2,
     }
 }
 

server/tests/sse_integration.rs

@@ -39,6 +39,7 @@ fn make_user(slug: &str) -> User {
         whisper: Default::default(),
         retention: Default::default(),
         window_hours: 72,
+        preview_lines: 2,
     }
 }
 

server/tests/transcribe_test.rs

@@ -267,6 +267,7 @@ fn test_config_with_whisper(whisper_url: String) -> Arc<Config> {
             whisper: Default::default(),
             retention: Default::default(),
             window_hours: 72,
+            preview_lines: 2,
         }],
         whisper_url,
         whisper_timeout_seconds: 5,

server/tests/transient_failure_retries_test.rs

@@ -76,6 +76,7 @@ async fn transient_whisper_failure_is_reenqueued_and_recovers() {
         whisper: Default::default(),
         retention: Default::default(),
         window_hours: 72,
+        preview_lines: 2,
     }];
     let config = Arc::new(cfg);
 

server/tests/upload_test.rs

@@ -24,6 +24,7 @@ fn test_config() -> Arc<Config> {
             whisper: Default::default(),
             retention: Default::default(),
             window_hours: 72,
+            preview_lines: 2,
         }],
         api_keys: HashMap::from([("test-key-123".into(), "dr_test".into())]),
         ..Config::test_default()

server/tests/web_test.rs

@@ -23,6 +23,7 @@ fn test_config() -> Arc<Config> {
             whisper: Default::default(),
             retention: Default::default(),
             window_hours: 72,
+            preview_lines: 2,
         }],
         api_keys: HashMap::from([("test-key".into(), "dr_test".into())]),
         ..Config::test_default()