fix: Telex spacing timing, add --update self-updater, add Telex engine tests

- Add 15ms delay between clipboard paste and trailing uinput ASCII
- Add 3 new Telex tests (Tuaans→Tuấn, nguyeenx→nguyễn, gios→gió)
- AppRun: --update flag downloads latest AppImage from GitHub releases

engine/src/bamboo.rs

@@ -528,4 +528,36 @@ mod tests {
         assert_eq!(process(InputMethod::Telex, "chafo"), "chào");
         assert_eq!(process(InputMethod::Vni, "chao2"), "chào");
     }
+
+#[test]
+fn test_telex_tuaan() {
+    let mut e = crate::bamboo::BambooEngine::new(crate::input_method::InputMethod::Telex);
+    let mut out = String::new();
+    for ch in "Tuaans".chars() {
+        if let Some(o) = e.process_key(ch) { out = o; }
+    }
+    assert_eq!(out, "Tuấn", "Expected Tuấn, got {}", out);
+}
+
+#[test]
+fn test_telex_nguyeenx() {
+    let mut e = crate::bamboo::BambooEngine::new(crate::input_method::InputMethod::Telex);
+    let mut out = String::new();
+    for ch in "nguyeenx".chars() {
+        if let Some(o) = e.process_key(ch) { out = o; }
+    }
+    assert_eq!(out, "nguyễn", "Expected nguyễn, got {}", out);
+}
+
+#[test]
+fn test_telex_gios() {
+    let mut e = crate::bamboo::BambooEngine::new(crate::input_method::InputMethod::Telex);
+    let mut out = String::new();
+    for ch in "gios".chars() {
+        if let Some(o) = e.process_key(ch) { out = o; }
+    }
+    assert_eq!(out, "gió", "Expected gió, got {}", out);
+}
+
+
 }

packaging/appimage/build-appimage.sh

@@ -197,6 +197,30 @@ cat > "$APPDIR/AppRun" << 'EOF'
 #!/bin/sh
 HERE="$(dirname "$(readlink -f "${0}")")"
 
+# Handle --update flag: download latest AppImage from GitHub
+if [ "$1" = "--update" ]; then
+    echo "Viet+ Self-Updater"
+    RELEASE_URL="https://github.com/vndangkhoa/vietc/releases/latest/download/Viet+-x86_64.AppImage"
+    TEMP="/tmp/Viet+-update.AppImage"
+    echo "Downloading latest release..."
+    if command -v curl >/dev/null 2>&1; then
+        curl -L -o "$TEMP" "$RELEASE_URL" 2>/dev/null
+    elif command -v wget >/dev/null 2>&1; then
+        wget -q -O "$TEMP" "$RELEASE_URL" 2>/dev/null
+    else
+        echo "ERROR: curl or wget required for updates" >&2
+        exit 1
+    fi
+    if [ -s "$TEMP" ]; then
+        chmod +x "$TEMP"
+        mv "$TEMP" "$(readlink -f "${0}")"
+        echo "Updated! Restart the AppImage."
+    else
+        echo "ERROR: Download failed" >&2
+    fi
+    exit 0
+fi
+
 # Export our bin dir on PATH so child processes can find sibling binaries
 export PATH="$HERE/usr/bin:$PATH"
 

protocol/src/uinput_monitor.rs

@@ -380,10 +380,14 @@ impl UinputInjector {
             }
         }
 
-        // Trailing ASCII via uinput (spaces, punctuation)
-        for ch in ascii_tail.chars() {
-            if let Some(kc) = char_to_linux_keycode(ch) {
-                self.send_key_stroke(kc, false);
+        // Trailing ASCII via uinput (spaces, punctuation).
+        // Small delay lets the clipboard paste finish before trailing chars arrive.
+        if !ascii_tail.is_empty() {
+            std::thread::sleep(std::time::Duration::from_millis(15));
+            for ch in ascii_tail.chars() {
+                if let Some(kc) = char_to_linux_keycode(ch) {
+                    self.send_key_stroke(kc, false);
+                }
             }
         }