fix: geocoding validation and emoji race condition

- Add addressdetails=1 to Nominatim query so address fields are populated
- Change emoji endpoint to server-side increment instead of client count
- Remove client-provided count from emoji PATCH validation

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

backend/index.js

@@ -183,7 +183,7 @@ app.post('/awards',
       const userAgent = process.env.NOMINATIM_USER_AGENT || 'BestOfPBAwardsApp/1.0';
 
       const resp = await fetch(
-        `${nominatimUrl}/search?format=json&q=${encodeURIComponent(address)}`,
+        `${nominatimUrl}/search?format=json&addressdetails=1&q=${encodeURIComponent(address)}`,
         { headers: { 'User-Agent': userAgent } }
       );
 
@@ -243,11 +243,10 @@ app.patch('/awards/:id/emojis',
   emojiLimiter,
   param('id').isInt().withMessage('Invalid award ID'),
   body('emoji').trim().isLength({ min: 1, max: 10 }).withMessage('Invalid emoji'),
-  body('count').isInt({ min: 0, max: 1000 }).withMessage('Count must be between 0 and 1000'),
   validate,
   (req, res) => {
     const { id } = req.params;
-    const { emoji, count } = req.body;
+    const { emoji } = req.body;
 
     db.get('SELECT * FROM awards WHERE id = ?', [id], (err, row) => {
       if (err || !row) {
@@ -256,7 +255,7 @@ app.patch('/awards/:id/emojis',
       }
 
       let emojiTally = row.emoji_tally ? JSON.parse(row.emoji_tally) : {};
-      emojiTally[emoji] = count;
+      emojiTally[emoji] = (emojiTally[emoji] || 0) + 1;
 
       db.run(
         'UPDATE awards SET emoji_tally = ? WHERE id = ?',