Add Load button to workflow picker to open workflows in new tab

Fetches the latest snapshot and loads it as a named temporary workflow
tab, keeping the current workflow untouched.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

js/snapshot_manager.js

@@ -2004,6 +2004,21 @@ const CSS = `
     font-size: 11px;
     color: var(--descrip-text, #888);
 }
+.snap-workflow-load-btn {
+    flex-shrink: 0;
+    margin-left: 6px;
+    padding: 1px 8px;
+    font-size: 10px;
+    border: 1px solid rgba(59, 130, 246, 0.4);
+    border-radius: 3px;
+    background: rgba(59, 130, 246, 0.15);
+    color: #3b82f6;
+    cursor: pointer;
+    line-height: 1.4;
+}
+.snap-workflow-load-btn:hover {
+    background: rgba(59, 130, 246, 0.3);
+}
 .snap-workflow-viewing-banner {
     padding: 5px 10px;
     border-bottom: 1px solid var(--border-color, #444);
@@ -2829,6 +2844,39 @@ async function buildSidebar(el) {
             row.appendChild(nameSpan);
             row.appendChild(countSpanItem);
 
+            // "Load" button — opens latest snapshot as a new workflow tab
+            if (entry.workflowKey !== currentKey) {
+                const loadBtn = document.createElement("button");
+                loadBtn.className = "snap-workflow-load-btn";
+                loadBtn.textContent = "Load";
+                loadBtn.title = "Open latest snapshot as a new workflow tab";
+                loadBtn.addEventListener("click", async (e) => {
+                    e.stopPropagation();
+                    try {
+                        const records = await db_getAllForWorkflow(entry.workflowKey);
+                        if (!records || records.length === 0) {
+                            showToast("No snapshots found for this workflow", "error");
+                            return;
+                        }
+                        // Get the most recent snapshot (last by timestamp)
+                        const latest = records[records.length - 1];
+                        const full = await db_getFullRecord(entry.workflowKey, latest.id);
+                        if (!full || !full.graphData) {
+                            showToast("Failed to load snapshot data", "error");
+                            return;
+                        }
+                        // Load as new tab with the workflow's name (string 4th arg = new temporary workflow with that name)
+                        await app.loadGraphData(full.graphData, true, true, entry.workflowKey);
+                        collapsePicker();
+                        showToast(`Loaded "${entry.workflowKey}" in a new tab`, "success");
+                    } catch (err) {
+                        console.error("[SnapshotManager] Load workflow failed:", err);
+                        showToast("Failed to load workflow", "error");
+                    }
+                });
+                row.appendChild(loadBtn);
+            }
+
             row.addEventListener("click", async () => {
                 if (entry.workflowKey === currentKey) {
                     viewingWorkflowKey = null;