Remove recipe/post toggle — auto-detect type from category selection

When user selects Reseptit category, recipe fields (time, servings,
ingredients, steps) appear automatically. All other categories show
the post body field instead. Removed the manual toggle buttons and
cleaned up related CSS.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

index.html

@@ -88,11 +88,6 @@
       <button class="modal-close" onclick="closeSubmitModal()">✕</button>
       <h2>✏️ Lisää julkaisu</h2>
 
-      <div class="type-toggle">
-        <button class="type-btn active" id="sub-typeRecipeBtn" onclick="setSubmitType('recipe')">🍳 Resepti</button>
-        <button class="type-btn" id="sub-typePostBtn" onclick="setSubmitType('post')">📝 Julkaisu</button>
-      </div>
-
       <div class="form-group">
         <label>Otsikko *</label>
         <input type="text" id="sub-title" placeholder="esim. Mummon mustikkapiirakka" maxlength="100" />