feat(calendarium@kami911): use primary location timezone for Sun/Moon times

The primary-location sunrise/sunset and moonrise/moonset calculations
called Sun.getSunTimes()/getMoonTimes() without a UTC offset, so they
were always rendered in the computer's system timezone even when the
primary location sits in a different one (e.g. Marmaris, Turkey on a
CET machine).

Add a "primary-tz" IANA timezone setting, populated automatically by the
city search (alongside latitude/longitude) just like the additional
cities. When set, its current UTC offset is passed to the Sun/Moon
calculations; when empty the behaviour is unchanged and the system
timezone is used.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PNasJnrStmVjJgJ8MULzcG

Author: KAMI911

calendarium@kami911/files/calendarium@kami911/desklet.js

@@ -171,6 +171,7 @@ CalendariumDesklet.prototype = {
             () => this._onLocationSearchChanged());
         s.bind("latitude",             "latitude",            cb);
         s.bind("longitude",            "longitude",           cb);
+        s.bind("primary-tz",           "primary_tz",          cb);
         s.bind("city1-name", "city1_name",
             () => this._onCityNameChanged(1));
         s.bind("city1-lat",  "city1_lat",  cb);
@@ -281,6 +282,7 @@ CalendariumDesklet.prototype = {
             let r = results[0];
             self.settings.setValue("latitude",  r.lat);
             self.settings.setValue("longitude", r.lon);
+            self.settings.setValue("primary-tz", r.tz || "");
             self.settings.setValue("use-manual-location", true);
             return false;
         });
@@ -320,6 +322,16 @@ CalendariumDesklet.prototype = {
         }
     },
 
+    /**
+     * UTC offset in hours to use for the primary location's Sun/Moon times.
+     * Uses the explicitly configured IANA timezone when set; otherwise returns
+     * null so the calculations fall back to the computer's system timezone
+     * (the default behaviour).
+     */
+    _getPrimaryUtcOffsetHours: function() {
+        return this._getCityUtcOffsetHours(this.primary_tz);
+    },
+
     /**
      * Format a UTC offset in hours as a "UTC±H" or "UTC±H:MM" string.
      */
@@ -1105,7 +1117,7 @@ CalendariumDesklet.prototype = {
         // Primary location
         let lat = this.use_manual_location ? this.latitude  : DEFAULT_LAT;
         let lon = this.use_manual_location ? this.longitude : DEFAULT_LON;
-        let sun = Sun.getSunTimes(now, lat, lon);
+        let sun = Sun.getSunTimes(now, lat, lon, this._getPrimaryUtcOffsetHours());
 
         let sunriseStr = this._sunStr(sun, "sunrise");
         let sunsetStr  = this._sunStr(sun, "sunset");
@@ -1250,7 +1262,7 @@ CalendariumDesklet.prototype = {
 
         let lat = this.use_manual_location ? this.latitude  : DEFAULT_LAT;
         let lon = this.use_manual_location ? this.longitude : DEFAULT_LON;
-        let mt  = Sun.getMoonTimes(now, lat, lon);
+        let mt  = Sun.getMoonTimes(now, lat, lon, this._getPrimaryUtcOffsetHours());
 
         let riseStr = mt.moonrise || _("No data");
         let setStr  = mt.moonset  || _("No data");

calendarium@kami911/files/calendarium@kami911/po/calendarium@kami911.pot

@@ -683,6 +683,17 @@ msgstr ""
 msgid "Longitude (positive = East)"
 msgstr ""
 
+#. settings-schema.json->primary-tz->description
+msgid "Primary location timezone (IANA, e.g. Europe/Budapest)"
+msgstr ""
+
+#. settings-schema.json->primary-tz->tooltip
+msgid ""
+"Timezone used for the primary location's sunrise/sunset and moonrise/moonset "
+"times. Filled automatically when using city search. Leave empty to use the "
+"computer's system timezone."
+msgstr ""
+
 #. settings-schema.json->city1-name->description
 msgid "City 1 name (leave empty to disable)"
 msgstr ""

calendarium@kami911/files/calendarium@kami911/po/hu.po

@@ -700,6 +700,20 @@ msgstr "Szélességi fok (pozitív = Észak)"
 msgid "Longitude (positive = East)"
 msgstr "Hosszúsági fok (pozitív = Kelet)"
 
+#. settings-schema.json->primary-tz->description
+msgid "Primary location timezone (IANA, e.g. Europe/Budapest)"
+msgstr "Elsődleges helyszín időzónája (IANA, pl. Europe/Budapest)"
+
+#. settings-schema.json->primary-tz->tooltip
+msgid ""
+"Timezone used for the primary location's sunrise/sunset and moonrise/moonset "
+"times. Filled automatically when using city search. Leave empty to use the "
+"computer's system timezone."
+msgstr ""
+"Az elsődleges helyszín nap- és holdkelte/-nyugta időpontjaihoz használt "
+"időzóna. A városkereső használatakor automatikusan kitöltődik. Üresen hagyva a "
+"számítógép rendszeridőzónája lesz érvényes."
+
 #. settings-schema.json->city1-name->description
 msgid "City 1 name (leave empty to disable)"
 msgstr "1. város neve (üresen hagyva kikapcsolt)"

calendarium@kami911/files/calendarium@kami911/settings-schema.json

@@ -94,7 +94,7 @@
             "keys": [
                 "use-manual-location",
                 "location-search",
-                "latitude", "longitude",
+                "latitude", "longitude", "primary-tz",
                 "city1-name", "city1-lat", "city1-lon", "city1-tz",
                 "city2-name", "city2-lat", "city2-lon", "city2-tz",
                 "city3-name", "city3-lat", "city3-lon", "city3-tz",
@@ -386,6 +386,14 @@
         "dependency": "use-manual-location",
         "indent": true
     },
+    "primary-tz": {
+        "type": "entry",
+        "default": "",
+        "description": "Primary location timezone (IANA, e.g. Europe/Budapest)",
+        "tooltip": "Timezone used for the primary location's sunrise/sunset and moonrise/moonset times. Filled automatically when using city search. Leave empty to use the computer's system timezone.",
+        "dependency": "use-manual-location",
+        "indent": true
+    },
     "city1-name": {
         "type": "entry",
         "default": "",