Fix setup.sh hanging on Python 3.14/macOS and add satellite enhancements

- Add --no-cache-dir and --timeout 120 to all pip calls to prevent hanging
  on corrupt/stale pip HTTP cache (cachecontrol .pyc issue)
- Replace silent python -c import verification with pip show to avoid
  import-time side effects hanging the installer
- Switch optional packages to --only-binary :all: to skip source compilation
  on Python versions without pre-built wheels (prevents gevent/numpy hangs)
- Warn early when Python 3.13+ is detected that some packages may be skipped
- Add ground track caching with 30-minute TTL to satellite route
- Add live satellite position tracker background thread via SSE fanout
- Add satellite_predict, satellite_telemetry, and satnogs utilities

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

static/js/modes/weather-satellite.js

@@ -302,6 +302,16 @@ const WeatherSat = (function() {
         }
     }
 
+    /**
+     * Pre-select a satellite without starting capture.
+     * Used by the satellite dashboard handoff so the user can review
+     * settings before hitting Start.
+     */
+    function preSelect(satellite) {
+        const satSelect = document.getElementById('weatherSatSelect');
+        if (satSelect) satSelect.value = satellite;
+    }
+
     /**
      * Start capture for a specific pass
      */
@@ -1910,6 +1920,7 @@ const WeatherSat = (function() {
         destroy,
         start,
         stop,
+        preSelect,
         startPass,
         selectPass,
         testDecode,