Implement product selection landing page (Feature 002)

Adds landing page at root URL (/) that displays all active products with links to feedback submission forms. This replaces the requirement for users to know direct product URLs.

Changes:
- Added Product.load_active() method to filter and sort active products alphabetically
- Created landing route blueprint with error handling and structured logging
- Registered landing blueprint in app factory, replacing old index route
- Created landing page template with product list and empty state
- Added comprehensive contract tests (6 tests) covering active products, filtering, sorting, XSS prevention
- Added integration test for complete user flow from landing page to submission form

All 7 tests pass. User Story 1 (P1 - MVP) complete.

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

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

app/__init__.py

@@ -182,18 +182,12 @@ def create_app(config_name='development'):
     )
 
     # Register blueprints
-    from app.routes import submission, dashboard, admin, auth
+    from app.routes import submission, dashboard, admin, auth, landing
     app.register_blueprint(submission.bp)
     app.register_blueprint(dashboard.bp)
     app.register_blueprint(admin.bp)
     app.register_blueprint(auth.bp)
-
-    # Set index route
-    @app.route('/')
-    def index():
-        """Welcome page"""
-        from flask import render_template
-        return render_template('index.html')
+    app.register_blueprint(landing.landing_bp)  # Landing page (product selection)
 
     # Health check endpoint (T208)
     @app.route('/health')

app/models/product.py

@@ -159,6 +159,22 @@ class Product:
 
         return products
 
+    @classmethod
+    def load_active(cls):
+        """Load all active products, sorted alphabetically by name then product_id
+
+        Returns:
+            list[Product]: Active products with valid submission_url_slug, sorted by:
+                           1. name (case-insensitive alphabetical)
+                           2. product_id (alphabetical) as tiebreaker
+
+        Products with missing/invalid submission_url_slug are excluded.
+        """
+        all_products = cls.get_all()
+        active = [p for p in all_products
+                  if p.status == 'active' and p.submission_url_slug]
+        return sorted(active, key=lambda p: (p.name.lower(), p.product_id))
+
     def save(self):
         """Save product to filesystem"""
         product_dir = self._get_product_dir(self.product_id)

app/routes/landing.py

@@ -0,0 +1,29 @@
+"""Landing page route - product selection"""
+from flask import Blueprint, render_template, current_app
+from app.models.product import Product
+
+landing_bp = Blueprint('landing', __name__)
+
+
+@landing_bp.route('/')
+def index():
+    """Landing page showing all active products for feedback submission
+
+    Returns:
+        Rendered HTML template with:
+        - List of active products (if any)
+        - Empty state message (if no active products)
+    """
+    try:
+        products = Product.load_active()
+        current_app.logger.info(
+            f'Landing page accessed: {len(products)} active products available'
+        )
+        return render_template('landing/index.html', products=products)
+    except Exception as e:
+        current_app.logger.error(
+            f'Error loading landing page: {e}',
+            exc_info=True
+        )
+        # Graceful degradation - show empty product list
+        return render_template('landing/index.html', products=[])

app/templates/landing/index.html

@@ -0,0 +1,37 @@
+{% extends "base.html" %}
+
+{% block title %}Select Product - Reklamator{% endblock %}
+
+{% block content %}
+<h1>Submit Feedback</h1>
+
+{% if products %}
+    <p>Select a product to share your feedback, report issues, or suggest improvements.</p>
+
+    <div style="margin-top: 30px;">
+        {% for product in products %}
+            <div style="background-color: #f8f9fa; padding: 20px; border-radius: 4px; margin-bottom: 15px; border-left: 4px solid #3498db;">
+                <h2 style="margin-top: 0; margin-bottom: 10px; font-size: 1.3em;">
+                    {{ product.name }}
+                </h2>
+
+                {% if product.description %}
+                    <p style="color: #666; margin-bottom: 15px;">{{ product.description }}</p>
+                {% endif %}
+
+                <a href="{{ url_for('submission.form', product_slug=product.submission_url_slug) }}"
+                   class="btn"
+                   style="display: inline-block;">
+                    Submit Feedback
+                </a>
+            </div>
+        {% endfor %}
+    </div>
+{% else %}
+    <div style="background-color: #fff3cd; padding: 20px; border-radius: 4px; border-left: 4px solid #ffc107; margin-top: 20px;">
+        <p style="margin: 0; color: #856404;">
+            No products are currently accepting feedback. Please check back later.
+        </p>
+    </div>
+{% endif %}
+{% endblock %}