feat: Add Save/Save Draft button to chat interface

- Add dynamic button that shows "Save" when no draft exists
- Changes to "Save Draft" when a pending draft is in progress
- Uses floppy disk icon (IconDeviceFloppy) for visual consistency
- Clicking "Save" creates empty draft and navigates to edit page
- Clicking "Save Draft" navigates to edit page with existing draft
- Reactive state tracking using useSelector for draft state

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

app/chat/page.tsx

@@ -15,12 +15,13 @@ import {
   Tooltip,
 } from '@mantine/core';
 import { useRef, useEffect, useState } from 'react';
-import { IconVolume, IconMicrophone, IconNotes } from '@tabler/icons-react';
+import { IconVolume, IconMicrophone, IconDeviceFloppy } from '@tabler/icons-react';
 import { UserMenu } from '@/components/UserMenu';
 import { useVoiceMode } from '@/hooks/useVoiceMode';
 import { useAppMachine } from '@/hooks/useAppMachine';
 import { notifications } from '@mantine/notifications';
 import { useMediaQuery } from '@mantine/hooks';
+import { useSelector } from '@xstate/react';
 
 /**
  * Get the voice button text based on the current state
@@ -62,6 +63,10 @@ export default function ChatPage() {
   // State for creating node
   const [isCreatingNode, setIsCreatingNode] = useState(false);
 
+  // Check if we have a pending draft (using useSelector for reactivity)
+  const pendingNodeDraft = useSelector(appActor, (state) => state.context.pendingNodeDraft);
+  const hasPendingDraft = !!pendingNodeDraft;
+
   // Use the clean voice mode hook
   const { state, send, transcript, error } = useVoiceMode({
     messages,
@@ -122,6 +127,34 @@ export default function ChatPage() {
     }
   };
 
+  // Handler for Manual/Save button
+  const handleManualOrSave = () => {
+    if (hasPendingDraft && pendingNodeDraft) {
+      // If we have a draft, navigate to edit with it
+      appActor.send({
+        type: 'NAVIGATE_TO_EDIT',
+        draft: pendingNodeDraft,
+      });
+    } else {
+      // Create an empty draft for manual entry
+      const emptyDraft = {
+        title: '',
+        content: '',
+        conversationContext: messages.map((m) => {
+          if ('parts' in m && Array.isArray((m as any).parts)) {
+            return `${m.role}: ${(m as any).parts.find((p: any) => p.type === 'text')?.text || ''}`;
+          }
+          return `${m.role}: ${(m as any).content || ''}`;
+        }).join('\n'),
+      };
+
+      appActor.send({
+        type: 'CREATE_NODE_FROM_CONVERSATION',
+        draft: emptyDraft,
+      });
+    }
+  };
+
   // Add initial greeting message on first load
   useEffect(() => {
     if (messages.length === 0) {
@@ -377,6 +410,15 @@ export default function ChatPage() {
                 variant="filled"
                 disabled={isVoiceActive}
               />
+              <Button
+                onClick={handleManualOrSave}
+                radius="xl"
+                variant={hasPendingDraft ? 'filled' : 'light'}
+                color={hasPendingDraft ? 'blue' : 'gray'}
+                leftSection={<IconDeviceFloppy size={20} />}
+              >
+                {hasPendingDraft ? 'Save Draft' : 'Save'}
+              </Button>
               <Button
                 type="submit"
                 radius="xl"