v2.26.0: fix SSE fanout crash and branded logo FOUC

- Fix SSE fanout thread AttributeError when source queue is None during
  interpreter shutdown by snapshotting to local variable with null guard
- Fix branded "i" logo rendering oversized on first page load (FOUC) by
  adding inline width/height to SVG elements across 10 templates
- Bump version to 2.26.0 in config.py, pyproject.toml, and CHANGELOG.md

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

utils/tscm/ble_scanner.py

@@ -180,9 +180,7 @@ class BLEScanner:
                             ble_device.manufacturer_name = COMPANY_IDS.get(company_id, f'Unknown ({hex(company_id)})')
                             # Handle various data types safely
                             try:
-                                if isinstance(data, (bytes, bytearray)):
-                                    ble_device.manufacturer_data = bytes(data)
-                                elif isinstance(data, (list, tuple)):
+                                if isinstance(data, (bytes, bytearray, list, tuple)):
                                     ble_device.manufacturer_data = bytes(data)
                                 elif isinstance(data, str):
                                     ble_device.manufacturer_data = bytes.fromhex(data)
@@ -237,7 +235,7 @@ class BLEScanner:
             try:
                 # Try to get existing event loop
                 try:
-                    loop = asyncio.get_running_loop()
+                    asyncio.get_running_loop()
                     # We're in an async context, can't use run()
                     future = asyncio.ensure_future(self.scan_async(duration))
                     return asyncio.get_event_loop().run_until_complete(future)