Add reset button and make re-roll append results

- Reset button clears mood text, runtime filter, kid-friendly toggle,
  and returns to the empty state
- Show Me More now appends new cards below existing results instead
  of replacing them

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

app/static/app.js

@@ -131,8 +131,11 @@ async function findMovies(excludeIds = []) {
     }
 
     document.getElementById('empty-state').classList.add('hidden');
-    document.getElementById('results').classList.add('hidden');
     document.getElementById('error-state').classList.add('hidden');
+    // On re-roll, keep existing results visible; on fresh search, hide them
+    if (!isReroll) {
+        document.getElementById('results').classList.add('hidden');
+    }
     document.getElementById('loading').classList.remove('hidden');
 
     try {
@@ -169,7 +172,7 @@ async function findMovies(excludeIds = []) {
         if (data.meta && data.meta.history_id) {
             currentHistoryId = data.meta.history_id;
         }
-        renderResults(data);
+        renderResults(data, isReroll);
         loadHistory();
     } catch (err) {
         document.getElementById('loading').classList.add('hidden');
@@ -178,14 +181,18 @@ async function findMovies(excludeIds = []) {
     }
 }
 
-function renderResults(data) {
+function renderResults(data, append = false) {
     document.getElementById('loading').classList.add('hidden');
 
     const grid = document.getElementById('results-grid');
-    grid.innerHTML = '';
+    if (!append) {
+        grid.innerHTML = '';
+    }
 
     if (!data.recommendations || data.recommendations.length === 0) {
-        document.getElementById('empty-state').classList.remove('hidden');
+        if (!append) {
+            document.getElementById('empty-state').classList.remove('hidden');
+        }
         return;
     }
 
@@ -393,5 +400,30 @@ document.getElementById('reroll-btn').addEventListener('click', () => {
     findMovies(shownMovieIds);
 });
 
+// Reset
+document.getElementById('reset-btn').addEventListener('click', () => {
+    // Clear mood input and state
+    document.getElementById('mood-input').value = '';
+    lastMood = '';
+    shownMovieIds = [];
+    currentHistoryId = null;
+
+    // Reset runtime filter
+    maxRuntime = null;
+    document.querySelectorAll('.runtime-btn').forEach(b => b.classList.remove('active'));
+    document.querySelector('.runtime-btn[data-runtime=""]').classList.add('active');
+
+    // Reset kid-friendly
+    kidFriendly = false;
+    document.getElementById('kid-friendly-btn').classList.remove('active');
+
+    // Reset view to empty state
+    document.getElementById('results').classList.add('hidden');
+    document.getElementById('loading').classList.add('hidden');
+    document.getElementById('error-state').classList.add('hidden');
+    document.getElementById('empty-state').classList.remove('hidden');
+    document.getElementById('results-grid').innerHTML = '';
+});
+
 // --- Init ---
 checkAuth();