chore: consolidate contact templates to single location

Remove duplicate contact templates:
- templates/partials/contact_success.html (old, 1.2KB)
- templates/partials/contact_error.html (old, 1.1KB)

The active templates remain in templates/partials/contact/:
- contact-success.html
- contact-error.html

Updated contact.go to use the new template names to match cv_contact.go.
The old templates had inline styles and were larger; the new ones use
external CSS and are more maintainable.

All contact form tests pass (7/7).

templates/partials/contact_error.html

@@ -1,31 +0,0 @@
-<div class="alert alert-error" role="alert" style="
-    padding: 1.5rem;
-    margin: 1rem 0;
-    border: 2px solid #ef4444;
-    border-radius: 0.5rem;
-    background-color: #fef2f2;
-    color: #991b1b;
-    animation: shake 0.4s ease-out;
-">
-    <div style="display: flex; align-items: start; gap: 1rem;">
-        <svg style="flex-shrink: 0; width: 1.5rem; height: 1.5rem; margin-top: 0.125rem;" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 8v4m0 4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z"></path>
-        </svg>
-        <div style="flex: 1;">
-            <h3 style="margin: 0 0 0.5rem 0; font-size: 1.125rem; font-weight: 600;">
-                Unable to Send Message
-            </h3>
-            <p style="margin: 0; font-size: 0.95rem; line-height: 1.5;">
-                {{.Message}}
-            </p>
-        </div>
-    </div>
-</div>
-
-<style>
-@keyframes shake {
-    0%, 100% { transform: translateX(0); }
-    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
-    20%, 40%, 60%, 80% { transform: translateX(5px); }
-}
-</style>

templates/partials/contact_success.html

@@ -1,36 +0,0 @@
-<div class="alert alert-success" role="alert" style="
-    padding: 1.5rem;
-    margin: 1rem 0;
-    border: 2px solid #22c55e;
-    border-radius: 0.5rem;
-    background-color: #f0fdf4;
-    color: #166534;
-    animation: slideIn 0.3s ease-out;
-">
-    <div style="display: flex; align-items: start; gap: 1rem;">
-        <svg style="flex-shrink: 0; width: 1.5rem; height: 1.5rem; margin-top: 0.125rem;" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 13l4 4L19 7"></path>
-        </svg>
-        <div style="flex: 1;">
-            <h3 style="margin: 0 0 0.5rem 0; font-size: 1.125rem; font-weight: 600;">
-                Message Sent Successfully!
-            </h3>
-            <p style="margin: 0; font-size: 0.95rem; line-height: 1.5;">
-                Thank you for reaching out. I've received your message and will get back to you as soon as possible.
-            </p>
-        </div>
-    </div>
-</div>
-
-<style>
-@keyframes slideIn {
-    from {
-        opacity: 0;
-        transform: translateY(-10px);
-    }
-    to {
-        opacity: 1;
-        transform: translateY(0);
-    }
-}
-</style>