Fix url_for references and improve navigation

Issues fixed:
- Fixed base.html to use url_for('landing.index') instead of url_for('index')
- Fixed error_403.html and error_404.html to use correct landing page endpoint
- Added Dashboard link in base.html nav for product owners
- Removed obsolete templates/index.html (replaced by landing page)
- Added dashboard link in landing/index.html for authenticated product owners
- Added test to verify landing page renders correctly with proper url_for references

All 8 landing page tests passing.

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

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

app/templates/base.html

@@ -189,9 +189,9 @@
     <div class="container">
         {% if current_user and current_user.is_authenticated %}
         <div class="nav">
-            <a href="{{ url_for('index') }}">Home</a>
+            <a href="{{ url_for('landing.index') }}">Home</a>
             {% if current_user.role == 'product_owner' %}
-                <span style="color: #999;">(Dashboard - Coming in Phase 5)</span>
+                <a href="{{ url_for('dashboard.list') }}">Dashboard</a>
             {% elif current_user.role == 'administrator' %}
                 <span style="color: #999;">(Admin Panel - Coming in Phase 6)</span>
             {% endif %}

app/templates/error_403.html

@@ -8,7 +8,7 @@
     <p>You do not have permission to access this resource.</p>
     <p>
         <a href="{{ url_for('dashboard.list') }}">Return to Dashboard</a> |
-        <a href="{{ url_for('index') }}">Go to Home</a>
+        <a href="{{ url_for('landing.index') }}">Go to Home</a>
     </p>
 </div>
 {% endblock %}

app/templates/error_404.html

@@ -8,7 +8,7 @@
     <p>The page or resource you requested could not be found.</p>
     <p>
         <a href="{{ url_for('dashboard.list') }}">Return to Dashboard</a> |
-        <a href="{{ url_for('index') }}">Go to Home</a>
+        <a href="{{ url_for('landing.index') }}">Go to Home</a>
     </p>
 </div>
 {% endblock %}

app/templates/index.html

@@ -1,22 +0,0 @@
-{% extends "base.html" %}
-
-{% block title %}Welcome - Reklamator{% endblock %}
-
-{% block content %}
-<div style="text-align: center; padding: 60px 20px;">
-    <h1 style="font-size: 2.5em; margin-bottom: 20px;">Reklamator</h1>
-    <p style="font-size: 1.3em; color: #666; margin-bottom: 40px;">
-        Anonymous Feedback Platform
-    </p>
-
-    <div style="max-width: 600px; margin: 0 auto; text-align: left;">
-        <h2>Submit Feedback</h2>
-        <p>If you have a product-specific submission link, use it to submit your feedback anonymously.</p>
-
-        <h2 style="margin-top: 40px;">Product Owners & Administrators</h2>
-        <p>
-            <a href="{{ url_for('auth.login') }}" class="btn">Login to Dashboard</a>
-        </p>
-    </div>
-</div>
-{% endblock %}

app/templates/landing/index.html

@@ -8,6 +8,16 @@
 {% if products %}
     <p>Select a product to share your feedback, report issues, or suggest improvements.</p>
 
+    {% if current_user and current_user.is_authenticated and current_user.role == 'product_owner' %}
+        <div style="margin-top: 20px; padding: 15px; background-color: #e7f3ff; border-radius: 4px; border-left: 4px solid #2196F3;">
+            <p style="margin: 0;">
+                <strong>Product Owner:</strong>
+                <a href="{{ url_for('dashboard.list') }}" style="color: #1976D2; text-decoration: underline;">Go to Dashboard</a>
+                to view and analyze feedback.
+            </p>
+        </div>
+    {% endif %}
+
     <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;">