fix(sessions): strip OpenClaw message_id suffix and allow 2-line titles

OpenClaw gateway injects `[message_id: UUID]` metadata at the end of
every message, wasting display space. Strip this suffix from both title
and summary fields.

Also change session title display from single-line truncate to
line-clamp-2, so longer titles (e.g. OpenClaw's timestamp-prefixed
messages) can show more meaningful content across two lines.

src-tauri/src/session_manager/providers/openclaw.rs

@@ -18,6 +18,15 @@ use super::utils::{
 
 const PROVIDER_ID: &str = "openclaw";
 
+/// Strip trailing `\n[message_id: ...]` metadata injected by OpenClaw gateway.
+fn strip_message_id_suffix(text: &str) -> &str {
+    if let Some(pos) = text.rfind("\n[message_id:") {
+        text[..pos].trim_end()
+    } else {
+        text
+    }
+}
+
 pub fn scan_sessions() -> Vec<SessionMeta> {
     let agents_dir = get_openclaw_dir().join("agents");
     if !agents_dir.exists() {
@@ -215,14 +224,15 @@ fn parse_session(path: &Path, display_names: Option<&HashMap<String, String>>) -
         if event_type == "message" {
             if let Some(message) = value.get("message") {
                 let text = message.get("content").map(extract_text).unwrap_or_default();
-                if !text.trim().is_empty() {
+                let cleaned = strip_message_id_suffix(&text);
+                if !cleaned.trim().is_empty() {
                     if first_user_message.is_none()
                         && message.get("role").and_then(Value::as_str) == Some("user")
                     {
-                        first_user_message = Some(text.trim().to_string());
+                        first_user_message = Some(cleaned.trim().to_string());
                     }
                     if summary.is_none() {
-                        summary = Some(text);
+                        summary = Some(cleaned.trim().to_string());
                     }
                 }
             }

src/components/sessions/SessionItem.tsx

@@ -85,7 +85,7 @@ export function SessionItem({
               {getProviderLabel(session.providerId, t)}
             </TooltipContent>
           </Tooltip>
-          <span className="text-sm font-medium truncate flex-1">
+          <span className="text-sm font-medium line-clamp-2 flex-1">
             {searchQuery ? highlightText(title, searchQuery) : title}
           </span>
           <ChevronRight