fix: add debug logging and fix Present Characters rendering

PROBLEM (reported by Salixfire):
- Present Characters panel showing placeholder instead of actual characters
- Thought bubbles work correctly but main panel doesn't
- Need to toggle settings off/on to get thoughts to appear
- No way to debug on mobile devices

CHANGES:

1. Added comprehensive debug logging to renderThoughts() (src/systems/rendering/thoughts.js):
   - Log when function is called and with what data
   - Log each line being parsed and how many parts it has
   - Log character extraction (emoji, name, traits, relationship, thoughts)
   - Log why characters are accepted or rejected
   - Log final character count and whether showing placeholder
   - All logs visible in mobile-friendly debug panel

2. Fixed toggle to refresh content (index.js:283-291):
   - When user toggles "Show Present Characters" on, now calls renderThoughts()
   - Previously only showed/hid container without refreshing content
   - This ensures panel displays latest data when toggled

3. Normalized parsing logic (src/systems/rendering/thoughts.js:111):
   - Changed renderThoughts() to require >= 3 parts (was >= 2)
   - Now matches updateChatThoughts() requirement
   - Consistent with current prompt format: Emoji:Name | Relationship | Thoughts
   - Removed 2-part format fallback code (unreachable now)
   - Both functions now use same validation rules

EXPECTED OUTCOME:
- User can enable debug mode and see exactly what data is being parsed
- Toggle will properly refresh the panel content
- We can diagnose from debug logs why placeholder is shown
- More consistent behavior between main panel and thought bubbles

Debug logs will help us identify:
- If characterThoughts data is empty/malformed when renderThoughts() is called
- If parsing is rejecting valid character data
- If there's a timing issue with data availability
- What the actual AI response format looks like

Related to previous commit (37878fc) that added debug mode toggle.

index.js

@@ -284,6 +284,10 @@ async function initUI() {
         extensionSettings.showCharacterThoughts = $(this).prop('checked');
         saveSettings();
         updateSectionVisibility();
+        // Refresh the content when toggling on/off
+        if (extensionSettings.showCharacterThoughts) {
+            renderThoughts();
+        }
     });
 
     $('#rpg-toggle-inventory').on('change', function() {