Modernize frontend with tabs, HTMX, and Tailwind build pipeline

Complete UI overhaul implementing modern design patterns with HTMX for
dynamic updates, proper Tailwind build pipeline, and improved UX.

Build Pipeline:
- Add npm + PostCSS + Tailwind CSS configuration
- Custom design system with brand colors
- Compiled CSS: 27KB (vs 3MB CDN), 99% reduction
- Makefile for unified build commands
- Inter font for improved typography

Tab Interface:
- Separate Tasks tab from Notes tab using HTMX
- Partial page updates without full refreshes
- Tab state management with proper refresh handling
- New endpoints: /tabs/tasks, /tabs/notes, /tabs/refresh

Template Architecture:
- Modular partials system (7 reusable components)
- Cleaner separation of concerns

Empty Board Management:
- Active boards in main 3-column grid
- Empty boards in collapsible section
- Reduces visual clutter

Visual Design Enhancements:
- Inter font, brand color accents
- Improved typography hierarchy and spacing
- Enhanced card styling with hover effects

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

1 files changed, 58 insertions, 0 deletions

diff --git a/web/templates/partials/todoist-tasks.html b/web/templates/partials/todoist-tasks.html
new file mode 100644
index 0000000..7595ac7
--- /dev/null
+++ b/web/templates/partials/todoist-tasks.html
@@ -0,0 +1,58 @@
+{{define "todoist-tasks"}}
+<section class="card">
+    <!-- Section Header with Brand Color -->
+    <div class="flex items-center gap-3 mb-6">
+        <div class="w-1 h-8 bg-todoist rounded"></div>
+        <h2 class="text-2xl font-bold text-gray-900">Todoist Tasks</h2>
+    </div>
+
+    {{if .Tasks}}
+    <div class="space-y-3">
+        {{range .Tasks}}
+        <div class="task-item">
+            <input type="checkbox" {{if .Completed}}checked{{end}}
+                   class="mt-1 h-5 w-5 text-todoist rounded border-gray-300" disabled>
+            <div class="flex-1">
+                <p class="font-medium text-gray-900 {{if .Completed}}line-through text-gray-500{{end}}">
+                    {{.Content}}
+                </p>
+                {{if .Description}}
+                <p class="text-sm text-gray-600 mt-1">{{.Description}}</p>
+                {{end}}
+                <div class="flex flex-wrap gap-2 mt-2">
+                    {{if .ProjectName}}
+                    <span class="badge bg-gray-100 text-gray-700">{{.ProjectName}}</span>
+                    {{end}}
+                    {{if .DueDate}}
+                    <span class="badge bg-yellow-100 text-yellow-800">
+                        Due: {{.DueDate.Format "Jan 2"}}
+                    </span>
+                    {{end}}
+                    {{range .Labels}}
+                    <span class="badge bg-blue-100 text-blue-800">{{.}}</span>
+                    {{end}}
+                </div>
+            </div>
+            {{if .URL}}
+            <a href="{{.URL}}" target="_blank" class="text-todoist hover:text-todoist/80 transition-colors">
+                <svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M10 6H6a2 2 0 00-2 2v10a2 2 0 002 2h10a2 2 0 002-2v-4M14 4h6m0 0v6m0-6L10 14"></path>
+                </svg>
+            </a>
+            {{end}}
+        </div>
+        {{end}}
+    </div>
+    {{else}}
+    <div class="text-center py-16">
+        <svg class="mx-auto h-12 w-12 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z" />
+        </svg>
+        <h3 class="mt-4 text-lg font-medium text-gray-900">No tasks found</h3>
+        <p class="mt-2 text-sm text-gray-500">
+            All tasks completed or no tasks available.
+        </p>
+    </div>
+    {{end}}
+</section>
+{{end}}