feat: Add tier change functionality to Players module

WHAT WAS DONE:
- Added tier change dropdown in Players Actions column
- Created POST route /admin/players/:discord_id/tier
- Implemented database tier update with MRR recalculation
- Added audit log entry for tier changes
- htmx reload of table after tier change

WHY:
- Trinity needs ability to manually adjust subscriber tiers
- Customer service: upgrades, downgrades, support cases
- Accountability via audit logging
- Last missing feature in Players module

HOW IT WORKS:
- Dropdown shows all tiers (except Admin 1000)
- On change, htmx POSTs to tier change endpoint
- Route updates subscriptions table (tier_level + mrr_value)
- Audit log records who made the change
- After success, table reloads to show updated tier

FEATURES:
- Real-time tier changes without page refresh
- Automatic MRR recalculation
- Audit trail for compliance
- Skips Admin tier (reserved for Trinity)
- Shows current tier as selected in dropdown

IMPACT:
- Trinity can now manage all subscriber tiers manually
- Critical for customer support scenarios
- Completes Players module functionality
- Ready for soft launch customer service

TODO:
- Discord role sync integration (marked in code)
- This requires bot API endpoint to be built

FILES MODIFIED:
- services/arbiter-3.0/src/views/admin/players/_table_body.ejs
- services/arbiter-3.0/src/routes/admin/players.js

TESTED:
- Not yet deployed - needs testing on Command Center

Signed-off-by: Claude (Chronicler #52) <claude@firefrostgaming.com>

services/arbiter-3.0/src/routes/admin/players.js

@@ -32,4 +32,41 @@ router.get('/table', async (req, res) => {
     res.render('admin/players/_table_body', { players, TIER_INFO, page, search });
 });
 
+// POST endpoint for tier changes
+router.post('/:discord_id/tier', async (req, res) => {
+    const { discord_id } = req.params;
+    const { tier_level } = req.body;
+    
+    try {
+        // Validate tier exists
+        if (!TIER_INFO[tier_level]) {
+            return res.status(400).send('Invalid tier');
+        }
+        
+        // Update tier in database
+        const tierInfo = TIER_INFO[tier_level];
+        await db.query(`
+            UPDATE subscriptions 
+            SET tier_level = $1, mrr_value = $2, updated_at = NOW()
+            WHERE discord_id = $3
+        `, [tier_level, tierInfo.price, discord_id]);
+        
+        // TODO: Sync Discord roles via bot
+        // This will be implemented when Discord bot integration is ready
+        
+        // Create audit log entry
+        await db.query(`
+            INSERT INTO admin_audit_log (admin_discord_id, action, target_discord_id, details)
+            VALUES ($1, 'tier_change', $2, $3)
+        `, [req.user.id, discord_id, `Changed tier to ${tierInfo.name}`]);
+        
+        // Return success (htmx will handle UI update)
+        res.send('OK');
+        
+    } catch (error) {
+        console.error('Tier change error:', error);
+        res.status(500).send('Error updating tier');
+    }
+});
+
 module.exports = router;

services/arbiter-3.0/src/views/admin/players/_table_body.ejs

@@ -28,7 +28,20 @@
             </span>
         </td>
         <td class="px-6 py-4 text-right">
-            <span class="text-gray-400 text-sm">(Coming Soon)</span>
+            <form hx-post="/admin/players/<%= player.discord_id %>/tier"
+                  hx-trigger="change from:select"
+                  hx-on::after-request="htmx.ajax('GET', '/admin/players/table', {target:'#player-table-body', swap:'innerHTML'})">
+                <select class="bg-gray-50 dark:bg-gray-700 border border-gray-300 dark:border-gray-600 rounded px-2 py-1 text-sm"
+                        name="tier_level">
+                    <option value="">Change Tier...</option>
+                    <% Object.keys(TIER_INFO).sort((a, b) => parseInt(b) - parseInt(a)).forEach(tierLevel => { 
+                        const tierData = TIER_INFO[tierLevel];
+                        if (tierLevel == 1000) return; // Skip Admin tier
+                    %>
+                        <option value="<%= tierLevel %>" <%= player.tier_level == tierLevel ? 'selected' : '' %>><%= tierData.name %> ($<%= tierData.price %>)</option>
+                    <% }); %>
+                </select>
+            </form>
         </td>
     </tr>
 <% }) %>