v0.7.25 - Implement SQL Query Admin API

- Move non-NIP-17 admin functions from dm_admin.c to api.c for better architecture
- Add NIP-44 encryption to send_admin_response() for secure admin responses
- Implement SQL query validation and execution with safety limits
- Add unified SQL query handler for admin API
- Fix buffer size for encrypted content to handle larger responses
- Update function declarations and includes across files
- Successfully test frontend query execution through web interface

api/index.html

@@ -274,6 +274,52 @@
         </div>
     </div>
 
+    <!-- SQL QUERY Section -->
+    <div class="section" id="sqlQuerySection" style="display: none;">
+        <div class="section-header">
+            <h2>SQL QUERY CONSOLE</h2>
+        </div>
+
+        <!-- Query Selector -->
+        <div class="input-group">
+            <label for="query-dropdown">Quick Queries & History:</label>
+            <select id="query-dropdown" onchange="loadSelectedQuery()">
+                <option value="">-- Select a query --</option>
+                <optgroup label="Common Queries">
+                    <option value="recent_events">Recent Events</option>
+                    <option value="event_stats">Event Statistics</option>
+                    <option value="subscriptions">Active Subscriptions</option>
+                    <option value="top_pubkeys">Top Pubkeys</option>
+                    <option value="event_kinds">Event Kinds Distribution</option>
+                    <option value="time_stats">Time-based Statistics</option>
+                </optgroup>
+                <optgroup label="Query History" id="history-group">
+                    <!-- Dynamically populated from localStorage -->
+                </optgroup>
+            </select>
+        </div>
+
+        <!-- Query Editor -->
+        <div class="input-group">
+            <label for="sql-input">SQL Query:</label>
+            <textarea id="sql-input" rows="5" placeholder="SELECT * FROM events LIMIT 10"></textarea>
+        </div>
+
+        <!-- Query Actions -->
+        <div class="input-group">
+            <button type="button" id="execute-sql-btn" class="primary-button">EXECUTE QUERY</button>
+            <button type="button" id="clear-sql-btn">CLEAR</button>
+            <button type="button" id="clear-history-btn" class="danger-button">CLEAR HISTORY</button>
+        </div>
+
+        <!-- Query Results -->
+        <div class="input-group">
+            <label>Query Results:</label>
+            <div id="query-info" class="info-box"></div>
+            <div id="query-table" class="config-table-container"></div>
+        </div>
+    </div>
+
     <!-- Load the official nostr-tools bundle first -->
     <!-- <script src="https://laantungir.net/nostr-login-lite/nostr.bundle.js"></script> -->
     <script src="/api/nostr.bundle.js"></script>