Add auto-author functionality and move publish button

- Auto-add author identity when not publishing on behalf of others
- Check for existing :author: and :p: tags, only add if missing
- Add ["author", displayName] and ["p", pubkey] tags automatically
- Move publish button from top gradient to underneath text area
- Preserve smart color functionality: blue for articles, green for notes
- Position publish button next to preview button for better UX

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

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

src/lib/components/ZettelEditor.svelte

@@ -185,8 +185,27 @@ Understanding the nature of knowledge itself...
           {/if}
         </div>
         
-        <!-- Unified Publishing Button -->
-        <div class="flex space-x-2">
+      </div>
+    </div>
+  </div>
+
+  <div class="flex items-center justify-between">
+    <Button
+      color="light"
+      size="sm"
+      on:click={togglePreview}
+      class="flex items-center space-x-1"
+    >
+      {#if showPreview}
+        <EyeOutline class="w-4 h-4" />
+        <span>Hide Preview</span>
+      {:else}
+        <EyeOutline class="w-4 h-4" />
+        <span>Show Preview</span>
+      {/if}
+    </Button>
+
+    <!-- Smart Publishing Button -->
     {#if generatedEvents && contentType !== 'none'}
       <Button
         color={contentType === 'article' ? 'blue' : 'green'}
@@ -208,26 +227,6 @@ Understanding the nature of knowledge itself...
       </div>
     {/if}
   </div>
-      </div>
-    </div>
-  </div>
-
-  <div class="flex items-center justify-between">
-    <Button
-      color="light"
-      size="sm"
-      on:click={togglePreview}
-      class="flex items-center space-x-1"
-    >
-      {#if showPreview}
-        <EyeOutline class="w-4 h-4" />
-        <span>Hide Preview</span>
-      {:else}
-        <EyeOutline class="w-4 h-4" />
-        <span>Show Preview</span>
-      {/if}
-    </Button>
-  </div>
 
   <div class="flex space-x-4 {showPreview ? 'h-96' : ''}">
     <!-- Editor Panel -->

src/lib/services/publisher.ts

@@ -143,11 +143,28 @@ export async function publishSingleEvent(
       return tag;
     });
 
+    // Auto-add author identity if not publishing on behalf of others
+    const hasAuthorTag = fixedTags.some(tag => tag[0] === 'author');
+    const hasPTag = fixedTags.some(tag => tag[0] === 'p');
+    
+    const finalTags = [...fixedTags];
+    
+    if (!hasAuthorTag && ndk.activeUser) {
+      // Add display name as author
+      const displayName = ndk.activeUser.profile?.displayName || ndk.activeUser.profile?.name || 'Anonymous';
+      finalTags.push(['author', displayName]);
+    }
+    
+    if (!hasPTag && ndk.activeUser) {
+      // Add pubkey as p-tag
+      finalTags.push(['p', ndk.activeUser.pubkey]);
+    }
+
     // Create and sign NDK event
     const ndkEvent = new NDKEvent(ndk);
     ndkEvent.kind = kind;
     ndkEvent.created_at = Math.floor(Date.now() / 1000);
-    ndkEvent.tags = fixedTags;
+    ndkEvent.tags = finalTags;
     ndkEvent.content = content;
     ndkEvent.pubkey = ndk.activeUser.pubkey;