feat: add guided project workflow panel (Discuss → Plan → Execute → Verify)

src/lib/components/NavMenu.svelte

@@ -23,6 +23,7 @@
   import PrdPanel from "./PrdPanel.svelte";
   import ChangelogPanel from "./ChangelogPanel.svelte";
   import TaskLoopPanel from "./TaskLoopPanel.svelte";
+  import WorkflowPanel from "./WorkflowPanel.svelte";
   import { injectTextStore } from "$lib/stores/projectContext";
 
   const DISCORD_URL = "https://chat.nhcarrigan.com";
@@ -67,6 +68,7 @@
   let showPrdPanel = $state(false);
   let showChangelog = $state(false);
   let showTaskLoop = $state(false);
+  let showWorkflowPanel = $state(false);
 
   const progress = $derived($achievementProgress);
   const activeAgentCount = $derived($runningAgentCount);
@@ -245,6 +247,15 @@
       <span>Task Loop</span>
     </button>
 
+    <!-- Guided Workflow -->
+    <button onclick={menuAction(() => (showWorkflowPanel = true))} class="nav-item">
+      <svg class="w-5 h-5 shrink-0" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 5l7 7-7 7" />
+        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M3 12h18" />
+      </svg>
+      <span>Guided Workflow</span>
+    </button>
+
     <!-- File Editor -->
     <button
       onclick={menuAction(() => editorStore.toggleEditor())}
@@ -513,6 +524,21 @@
   <TaskLoopPanel onClose={() => (showTaskLoop = false)} />
 {/if}
 
+{#if showWorkflowPanel}
+  <WorkflowPanel
+    onClose={() => (showWorkflowPanel = false)}
+    onOpenPrdPanel={() => {
+      showWorkflowPanel = false;
+      showPrdPanel = true;
+    }}
+    onOpenTaskLoop={() => {
+      showWorkflowPanel = false;
+      showTaskLoop = true;
+    }}
+    workingDirectory={workingDirectory || selectedDirectory}
+  />
+{/if}
+
 <style>
   .nav-item {
     display: flex;