Remove Baseline section, fix filters and radar layout

- Removed Baseline section from Bluetooth sidebar (no longer needed)
- Fixed device filter buttons not working (changed display to '' instead
  of 'block' to preserve flexbox layout)
- Fixed proximity radar being cut off by bottom panels:
  - Added overflow: hidden to radar panel
  - Constrained bottom panels to max-height: 120px
  - Made radar content respect parent boundaries

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

templates/partials/modes/bluetooth.html

@@ -43,21 +43,6 @@
                         </button>
                     </div>
 
-                    <div class="section">
-                        <h3>Baseline</h3>
-                        <div class="info-text" id="btBaselineStatus" style="margin-bottom: 8px;">
-                            No baseline set
-                        </div>
-                        <div style="display: flex; gap: 8px;">
-                            <button class="preset-btn" onclick="btSetBaseline()" style="flex: 1;">
-                                Set Baseline
-                            </button>
-                            <button class="preset-btn" onclick="btClearBaseline()" style="flex: 1;">
-                                Clear
-                            </button>
-                        </div>
-                    </div>
-
                     <!-- Message Container for status cards -->
                     <div id="btMessageContainer"></div>