fix: Allow emoji-only status changes without text

When creating a new status with only an emoji change (no text), the
validation was incorrectly showing 'No changes'. Fixed by:

1. Properly handling the case where there's no current status (emoji is null)
2. Triggering validation after emoji selection from picker
3. Only disabling submission when the new status is identical to existing

Fixes #56

Co-authored-by: nate nowack <[e-mail]>

templates/status.html

···
                     
                     statusInput.value = emoji;
                     emojiPicker.style.display = 'none';
+                    checkForChanges();
                 });
             });
         } else if (category === 'custom') {
···
                     selectedEmoji.innerHTML = `<img src="${img.src}" alt="${img.alt}" style="width: 100%; height: 100%; object-fit: contain;">`;
                     statusInput.value = emojiValue;
                     emojiPicker.style.display = 'none';
+                    checkForChanges();
                 });
             });
         } else {
···
                     selectedEmoji.textContent = emoji;
                     statusInput.value = emoji;
                     emojiPicker.style.display = 'none';
+                    checkForChanges();
                 });
             });
         }
···
                 
                 statusInput.value = emojiValue;
                 emojiPicker.style.display = 'none';
+                checkForChanges();
                 // Clear search when emoji is selected
                 document.getElementById('emoji-search').value = '';
             });
···
         const newText = statusText.value.trim();
         
         // Check if this is identical to current status
-        if (currentStatus.emoji === newEmoji && currentStatus.text === newText) {
+        // If there's no current status (emoji is null), allow any emoji selection as a change
+        const hasCurrentStatus = currentStatus.emoji !== null;
+        const isIdentical = hasCurrentStatus && 
+                           currentStatus.emoji === newEmoji && 
+                           currentStatus.text === newText;
+        
+        if (isIdentical) {
             saveBtn.disabled = true;
             saveBtn.textContent = 'No changes';
         } else {