Release v3.6.3: OTA reliability + watchdog fix + WebUI live radar

Fixes a watchdog reset that could crash the device after many hours
of continuous flight logging: yield() alone doesn't reliably feed the
task watchdog (it only yields to the idle task when another
equal-or-higher-priority task is actually ready to run), so long CSV
scans in flight_logbook.cpp now use delay(1) instead, in
countLinesFast(), loadSeenFromCurrentFile(), and todayMaxAltitude().

Bundles all OTA reliability and WebUI live radar work already
committed since v3.6.0 (title-overflow fix, OTA diagnostic logging,
NetTask pause/resume during updates, WebUI radar compass/click/
radius/starfield enhancements).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/config.h

@@ -6,7 +6,7 @@ namespace Config {
     // CLAUDE.md-Workflow "Standard-Workflow: Push & Release") - erscheint
     // im Info-Screen (Menue > System > Info) und muss zum jeweiligen
     // Git-Tag passen.
-    constexpr const char* APP_VERSION = "3.6.2";
+    constexpr const char* APP_VERSION = "3.6.3";
 
     // Display-Helligkeit (Menue > System > Helligkeit), in Prozent.
     // MIN bewusst nicht 0 - ein komplett dunkles Display koennte sonst wie

src/flight_logbook.cpp

@@ -92,7 +92,7 @@ namespace {
                 if (buf[i] == '\n') lines++;
             }
             blocksRead++;
-            if (blocksRead % 8 == 0) yield();
+            if (blocksRead % 8 == 0) delay(1);
         }
         return lines;
     }
@@ -141,7 +141,7 @@ namespace {
                 }
             }
             blocksRead++;
-            if (blocksRead % 8 == 0) yield();
+            if (blocksRead % 8 == 0) delay(1);
         }
         f.close();
     }
@@ -284,6 +284,7 @@ TopAltitude todayMaxAltitude() {
     if (!f) return result;
 
     bool firstLine = true;
+    uint32_t lineIdx = 0;
     while (f.available()) {
         String line = f.readStringUntil('\n');
         if (firstLine) { firstLine = false; continue; } // CSV-Header ueberspringen
@@ -315,7 +316,8 @@ TopAltitude todayMaxAltitude() {
             strncpy(result.callsign, callsign.c_str(), sizeof(result.callsign) - 1);
             result.callsign[sizeof(result.callsign) - 1] = 0;
         }
-        yield();
+        lineIdx++;
+        if (lineIdx % 16 == 0) delay(1);
     }
     f.close();