Native viewer: use guruconnect:// protocol with fallback to download

server/static/dashboard.html

@@ -596,14 +596,17 @@
                         <div class="connect-option-desc">Full keyboard capture including Win key, Alt+Tab, and Ctrl+Alt+Del.</div>
                     </div>
                 </div>
-                <div id="nativeCommandContainer" style="display: none;">
+                <div id="nativeNotInstalled" style="display: none; margin-top: 16px; padding: 16px; background: hsla(45, 93%, 47%, 0.1); border: 1px solid hsla(45, 93%, 47%, 0.3); border-radius: 8px;">
-                    <div class="native-command">
+                    <p style="margin-bottom: 12px; color: hsl(45, 93%, 55%);">
-                        <button class="copy-btn" onclick="copyNativeCommand()">Copy</button>
+                        <strong>Native viewer not installed</strong>
-                        <code id="nativeCommandText"></code>
-                    </div>
-                    <p style="margin-top: 12px; font-size: 12px; color: hsl(var(--muted-foreground));">
-                        Run this command in PowerShell or CMD where guruconnect-viewer.exe is located.
                     </p>
+                    <p style="font-size: 13px; margin-bottom: 12px; color: hsl(var(--muted-foreground));">
+                        Download and run GuruConnect to register the protocol handler, then click "Try Again".
+                    </p>
+                    <div style="display: flex; gap: 8px;">
+                        <a href="/downloads/guruconnect.exe" class="btn btn-primary" style="text-decoration: none;">Download GuruConnect</a>
+                        <button class="btn btn-outline" onclick="retryNativeViewer()">Try Again</button>
+                    </div>
                 </div>
             </div>
         </div>
@@ -927,24 +930,26 @@
         // Connect modal state
         let connectSessionId = null;
         let connectMachineName = null;
+        let protocolCheckTimeout = null;
 
         const connectModal = document.getElementById("connectModal");
         const connectClose = document.getElementById("connectClose");
         const connectWeb = document.getElementById("connectWeb");
         const connectNative = document.getElementById("connectNative");
-        const nativeCommandContainer = document.getElementById("nativeCommandContainer");
+        const nativeNotInstalled = document.getElementById("nativeNotInstalled");
-        const nativeCommandText = document.getElementById("nativeCommandText");
         const connectMachineNameEl = document.getElementById("connectMachineName");
 
         connectClose.addEventListener("click", () => {
             connectModal.classList.remove("active");
-            nativeCommandContainer.style.display = "none";
+            nativeNotInstalled.style.display = "none";
+            if (protocolCheckTimeout) clearTimeout(protocolCheckTimeout);
         });
 
         connectModal.addEventListener("click", (e) => {
             if (e.target === connectModal) {
                 connectModal.classList.remove("active");
-                nativeCommandContainer.style.display = "none";
+                nativeNotInstalled.style.display = "none";
+                if (protocolCheckTimeout) clearTimeout(protocolCheckTimeout);
             }
         });
 
@@ -953,27 +958,63 @@
                 const viewerUrl = "/viewer.html?session_id=" + connectSessionId;
                 window.open(viewerUrl, "viewer_" + connectSessionId, "width=1280,height=800,menubar=no,toolbar=no,location=no,status=no");
                 connectModal.classList.remove("active");
-                nativeCommandContainer.style.display = "none";
+                nativeNotInstalled.style.display = "none";
             }
         });
 
         connectNative.addEventListener("click", () => {
-            if (connectSessionId) {
+            launchNativeViewer();
-                const protocol = window.location.protocol === "https:" ? "wss:" : "ws:";
-                const serverUrl = protocol + "//" + window.location.host + "/ws/viewer";
-                const cmd = `guruconnect-viewer.exe -i ${connectSessionId} -s ${serverUrl}`;
-                nativeCommandText.textContent = cmd;
-                nativeCommandContainer.style.display = "block";
-            }
         });
 
-        function copyNativeCommand() {
+        function launchNativeViewer() {
-            const cmd = nativeCommandText.textContent;
+            if (!connectSessionId) return;
-            navigator.clipboard.writeText(cmd).then(() => {
+
-                const btn = document.querySelector(".copy-btn");
+            const protocol = window.location.protocol === "https:" ? "wss:" : "ws:";
-                btn.textContent = "Copied!";
+            const serverUrl = encodeURIComponent(protocol + "//" + window.location.host + "/ws/viewer");
-                setTimeout(() => btn.textContent = "Copy", 2000);
+            const protocolUrl = `guruconnect://view/${connectSessionId}?server=${serverUrl}`;
-            });
+
+            // Try to launch the protocol handler
+            // We use a hidden iframe to avoid navigation issues
+            const iframe = document.createElement("iframe");
+            iframe.style.display = "none";
+            document.body.appendChild(iframe);
+
+            // Set up timeout to detect if protocol handler didn't work
+            let launched = false;
+            const startTime = Date.now();
+
+            // If window loses focus quickly, protocol likely worked
+            const blurHandler = () => {
+                if (Date.now() - startTime < 2000) {
+                    launched = true;
+                    connectModal.classList.remove("active");
+                    nativeNotInstalled.style.display = "none";
+                }
+            };
+            window.addEventListener("blur", blurHandler, { once: true });
+
+            // Try to launch
+            try {
+                iframe.contentWindow.location.href = protocolUrl;
+            } catch (e) {
+                // Some browsers throw on custom protocols
+            }
+
+            // Fallback: also try window.location for browsers that block iframe protocols
+            protocolCheckTimeout = setTimeout(() => {
+                window.removeEventListener("blur", blurHandler);
+                document.body.removeChild(iframe);
+
+                if (!launched) {
+                    // Protocol handler probably not installed, show download option
+                    nativeNotInstalled.style.display = "block";
+                }
+            }, 1500);
+        }
+
+        function retryNativeViewer() {
+            nativeNotInstalled.style.display = "none";
+            launchNativeViewer();
         }
 
         function connectToMachine(sessionId) {
@@ -981,7 +1022,7 @@
             connectSessionId = sessionId;
             connectMachineName = machine?.agent_name || sessionId.slice(0, 8);
             connectMachineNameEl.textContent = connectMachineName;
-            nativeCommandContainer.style.display = "none";
+            nativeNotInstalled.style.display = "none";
             connectModal.classList.add("active");
         }