style: increase dashboard content width by 10%

- Changed .container max-width from 1200px to 1320px
- Provides more space for dashboard content
- Better utilization of screen real estate

templates/base.html

@@ -25,7 +25,7 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
     <style>
         * { margin: 0; padding: 0; box-sizing: border-box; }
         body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif; background: #1a1a2e; color: #e0e0e0; }
-        .container { max-width: 1200px; margin: 0 auto; padding: 20px; }
+        .container { max-width: 1320px; margin: 0 auto; padding: 20px; }
         .header { background: #16213e; color: white; padding: 20px 0; margin-bottom: 30px; border-bottom: 2px solid #0f3460; }
         .header h1 { font-size: 24px; font-weight: 600; display: inline-block; }
         .header-actions { float: right; }