Weather info popup, larger System menu buttons, group Flight toggles

Tapping the weather icon in the header now shows a small info popup
explaining that the shown weather always follows the currently active
location (including an active location preset).

The System menu's buttons now fill the available screen height
instead of leaving unused space below, computed from a dedicated
systemRowRect() helper. "Info" (About) is pinned as the second-to-last
entry, directly above Back, so its position stays stable regardless of
how many other entries come before it.

In the Flight options menu, all plain ON/OFF toggles (LED heartbeat,
emergency alert, proximity LED, watchlist alert, hide ground vehicles)
are now grouped together at the end of the list, right above Back,
instead of being interleaved with the screen/list entries above them.

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

src/main.cpp

@@ -164,6 +164,100 @@ void drawWeatherIcon() {
     }
 }
 
+// Einfacher Zeilenumbruch fuer Fliesstext, analog zu layoutWrapped() in
+// menu_screen.cpp/webui_screen.cpp (siehe "keine geteilten Module"-Konvention
+// - jede Screen-Datei hat ihre eigene kleine Kopie). Ohne Scroll-Unterstuetzung,
+// da der Infotext des Wetter-Popups kurz genug ist, um immer komplett in die
+// verfuegbare Boxhoehe zu passen.
+int16_t weatherInfoLayoutWrapped(TFT_eSPI& tftRef, int16_t x, int16_t startY,
+                                  int16_t maxWidth, int16_t lineHeight, const String& text) {
+    int16_t y = startY;
+    int32_t start = 0;
+    int32_t len = text.length();
+    while (start < len) {
+        while (start < len && text[start] == ' ') start++;
+        if (start >= len) break;
+
+        String line = text.substring(start, len);
+        while (tftRef.textWidth(line) > maxWidth) {
+            int32_t lastSpace = line.lastIndexOf(' ');
+            if (lastSpace <= 0) break;
+            line = line.substring(0, lastSpace);
+        }
+
+        tftRef.setCursor(x, y);
+        tftRef.print(line);
+        y += lineHeight;
+        start += line.length();
+    }
+    return y;
+}
+
+void weatherInfoDrawButton(TFT_eSPI& tftRef, const Rect& r, const String& label) {
+    tftRef.fillRoundRect(r.x, r.y, r.w, r.h, 4, TFT_BLACK);
+    tftRef.drawRoundRect(r.x, r.y, r.w, r.h, 4, TFT_GREEN);
+    tftRef.setTextDatum(MC_DATUM);
+    tftRef.setTextColor(TFT_GREEN, TFT_BLACK);
+    tftRef.drawString(label, r.x + r.w / 2, r.y + r.h / 2);
+    tftRef.setTextDatum(TL_DATUM);
+}
+
+// Kleines Info-Fenster beim Antippen des Wetter-Icons im Header - erklaert,
+// dass das angezeigte Wetter immer zum aktuell aktiven Standort (bzw.
+// aktivem Standort-Preset, siehe LocationManager::getHomeLocation())
+// gehoert. Gleicher geboxter Overlay-Stil wie confirmLogbookEnable() in
+// menu_screen.cpp, hier aber ohne Warnfarbe und nur mit einem
+// Zurueck-Button, da rein informativ (keine Bestaetigung noetig).
+void showWeatherInfo(TFT_eSPI& tftRef) {
+    constexpr int16_t BOX_X = 4;
+    constexpr int16_t BOX_Y = 4;
+    constexpr int16_t BOX_W = Config::SCREEN_WIDTH - 2 * BOX_X;
+    constexpr int16_t BOX_H = Config::SCREEN_HEIGHT - 2 * BOX_Y;
+    constexpr int16_t TEXT_MAX_WIDTH = BOX_W - 20;
+    constexpr int16_t LINE_H = 16;
+    constexpr int16_t TITLE_Y = BOX_Y + 16;
+    // Eine Leerzeile Abstand zwischen Titel und Fliesstext.
+    constexpr int16_t VIEW_TOP = TITLE_Y + 12 + LINE_H;
+
+    constexpr int16_t BTN_H = 36;
+    constexpr int16_t BOTTOM_MARGIN = 8;
+    constexpr int16_t BACK_Y = BOX_Y + BOX_H - BOTTOM_MARGIN - BTN_H;
+
+    String body = I18n::t(StringId::WEATHER_INFO_BODY);
+
+    Rect backBtn = {(int16_t)(BOX_X + 10), BACK_Y, (int16_t)(BOX_W - 20), BTN_H};
+
+    MenuStars::reset();
+
+    auto redraw = [&]() {
+        tftRef.fillScreen(TFT_BLACK);
+        tftRef.drawRoundRect(BOX_X, BOX_Y, BOX_W, BOX_H, 6, TFT_GREEN);
+
+        tftRef.setTextDatum(MC_DATUM);
+        tftRef.setTextColor(TFT_GREEN, TFT_BLACK);
+        tftRef.setTextSize(2);
+        tftRef.drawString(I18n::t(StringId::WEATHER_INFO_TITLE), BOX_X + BOX_W / 2, TITLE_Y);
+        tftRef.setTextSize(1);
+        tftRef.setTextDatum(TL_DATUM);
+
+        tftRef.setTextColor(TFT_GREEN, TFT_BLACK);
+        weatherInfoLayoutWrapped(tftRef, BOX_X + 10, VIEW_TOP, TEXT_MAX_WIDTH, LINE_H, body);
+
+        weatherInfoDrawButton(tftRef, backBtn, I18n::t(StringId::BACK));
+    };
+
+    redraw();
+
+    while (true) {
+        TouchInput::Point tap;
+        if (TouchInput::wasTapped(tap)) {
+            if (backBtn.contains(tap.x, tap.y)) return;
+        }
+        MenuStars::update(tftRef);
+        delay(20);
+    }
+}
+
 void drawWifiIcon(int16_t rightX, int16_t rowTop, int16_t rowH, int8_t rssi) {
     uint8_t level;
     if (rssi >= -55) level = 4;
@@ -467,6 +561,11 @@ void loop() {
             drawHeader();
             updateStatusLine();
             forceRedraw = true;
+        } else if (weatherIconRect.contains(tap.x, tap.y)) {
+            showWeatherInfo(tft);
+            drawHeader();
+            updateStatusLine();
+            forceRedraw = true;
         } else if (tap.y >= CONTENT_TOP) {
             if (RadarScreen::handleTap(tap.x, tap.y, CONTENT_TOP)) {
                 forceRedraw = true;