Fix navigation: add header to all views, fix back button navigation, add mobile menu to document and editor views

- Document view: Added hamburger menu button and breadcrumb navigation
- Editor view: Added hamburger menu, breadcrumb nav, fixed handleCancel/handleSave
- Editor now navigates to correct parent (project) instead of dashboard
- Mobile menu works on all views (projects, projectView, document, editor)
- Document view back button goes to project (not dashboard)
- Editor cancel/save buttons now go to project or projects list

public/js/views/editor.js

@@ -3,7 +3,7 @@
 import { api } from '../api.js';
 
 export async function renderEditor(app) {
-  const { id, libraryId } = app.state.params;
+  const { id, projectId, libraryId } = app.state.params;
   let doc = null;
   let libraries = [];
   
@@ -12,7 +12,7 @@ export async function renderEditor(app) {
       doc = await api.getDocument(id);
     } catch (e) {
       app.showToast('Failed to load document', 'error');
-      app.navigate('dashboard');
+      app.navigate(projectId ? 'project' : 'projects', { id: projectId });
       return;
     }
   }
@@ -25,6 +25,30 @@ export async function renderEditor(app) {
   const isNew = !id;
   const appEl = document.getElementById('app');
   
+  // Determine back navigation target
+  const backTarget = projectId 
+    ? { view: 'project', params: { id: projectId } }
+    : { view: 'projects', params: {} };
+  
+  const backToParent = () => {
+    if (projectId) {
+      app.navigate('project', { id: projectId });
+    } else {
+      app.navigate('projects');
+    }
+  };
+
+  // Mobile menu functions
+  window.toggleEditorMenu = function() {
+    const menu = document.getElementById('editor-menu');
+    if (menu) menu.classList.toggle('open');
+  };
+
+  window.closeEditorMenu = function() {
+    const menu = document.getElementById('editor-menu');
+    if (menu) menu.classList.remove('open');
+  };
+
   let formData = {
     title: doc?.title || '',
     content: doc?.content || '',
@@ -41,10 +65,27 @@ export async function renderEditor(app) {
   function render() {
     appEl.innerHTML = `
       <header class="app-header">
+        <button type="button" class="mobile-nav-btn" onclick="window.toggleEditorMenu()" title="Menu">☰</button>
         <button type="button" class="btn btn-ghost" onclick="handleCancel()">Cancel</button>
-        <span style="flex:1;margin-left:16px">${isNew ? 'New Document' : 'Editing: ' + escapeHtml(formData.title)}</span>
+        <div class="breadcrumb-nav">
+          <span class="breadcrumb-link" onclick="window.app.navigate('projects')">Projects</span>
+          <span class="breadcrumb-sep">/</span>
+          ${projectId ? `<span class="breadcrumb-link" onclick="window.app.navigate('project', {id: '${projectId}'})">Project</span><span class="breadcrumb-sep">/</span>` : ''}
+          <span class="breadcrumb-current">${isNew ? 'New Document' : escapeHtml(formData.title)}</span>
+        </div>
         <button type="button" class="btn btn-primary" onclick="handleSave()">Save</button>
       </header>
+      <div class="mobile-menu" id="editor-menu">
+        <div class="mobile-menu-header">
+          <span>Menu</span>
+          <button onclick="window.closeEditorMenu()">✕</button>
+        </div>
+        <div class="mobile-menu-content">
+          <a href="#" onclick="handleCancel(); return false;">← Cancel & Go Back</a>
+          <a href="#" onclick="handleSave(); window.closeEditorMenu(); return false;">💾 Save Document</a>
+          <a href="#" onclick="window.app.navigate('projects'); window.closeEditorMenu(); return false;">📋 All Projects</a>
+        </div>
+      </div>
       <main class="main-content">
         <div class="editor-container">
           <form class="editor-form" id="editor-form">
@@ -186,7 +227,11 @@ export async function renderEditor(app) {
         const confirmed = await app.confirmDelete('You have unsaved changes. Discard?');
         if (!confirmed) return;
       }
-      app.navigate('dashboard');
+      if (projectId) {
+        app.navigate('project', { id: projectId });
+      } else {
+        app.navigate('projects');
+      }
     };
 
     window.handleSave = async () => {
@@ -204,12 +249,16 @@ export async function renderEditor(app) {
 
       try {
         if (isNew) {
-          await api.createDocument(data);
+          await api.createDocument({...data, projectId});
         } else {
           await api.updateDocument(id, data);
         }
         app.showToast('Document saved', 'success');
-        app.navigate('dashboard');
+        if (projectId) {
+          app.navigate('project', { id: projectId });
+        } else {
+          app.navigate('projects');
+        }
       } catch (e) {
         app.showToast('Failed to save: ' + e.message, 'error');
       }