fix: UTF-8 boundary issue in compactor and remove openfang-runtime from bundle

desktop/src-tauri/src/intelligence/compactor.rs

@@ -306,20 +306,24 @@ impl ContextCompactor {
     fn extract_topic(&self, content: &str) -> Option<String> {
         let trimmed = content.trim();
 
-        // First sentence or first 50 chars
+        // Find sentence end markers (byte position)
         let sentence_end = trimmed.find(|c| c == '。' || c == '！' || c == '？' || c == '\n');
 
-        if let Some(pos) = sentence_end {
-            if pos <= 80 {
-                return Some(trimmed[..=pos].to_string());
+        if let Some(byte_pos) = sentence_end {
+            if byte_pos <= 80 {
+                // Find the char boundary after the sentence end marker
+                // The marker itself is a single char (1-3 bytes for Chinese)
+                let end_boundary = byte_pos + trimmed[byte_pos..].chars().next().map(|c| c.len_utf8()).unwrap_or(1);
+                return Some(trimmed[..end_boundary].to_string());
             }
         }
 
-        if trimmed.len() <= 50 {
+        if trimmed.chars().count() <= 50 {
             return Some(trimmed.to_string());
         }
 
-        Some(format!("{}...", &trimmed[..50]))
+        // Use chars() to safely handle UTF-8 boundaries
+        Some(format!("{}...", trimmed.chars().take(50).collect::<String>()))
     }
 
     /// Extract key conclusions/decisions from assistant messages

desktop/src-tauri/tauri.conf.json

@@ -26,13 +26,6 @@
   "bundle": {
     "active": true,
     "targets": "nsis",
-    "useLocalToolsDir": true,
-    "resources": [
-      "resources/openfang-runtime/"
-    ],
-    "externalBin": [
-      "binaries/ov"
-    ],
     "icon": [
       "icons/32x32.png",
       "icons/128x128.png",