fix(widgets): config saves, live world clocks, quick-timer guards

- Config screens share WidgetConfigActivity: a picker that dismisses right
  after selecting no longer finishes with RESULT_CANCELED (which removed a
  newly placed widget on API 29/30), and the save runs to completion.
- Digital config shows only once stored settings are read, so an early OK
  or a late load can't write defaults over them.
- Digital widget collects world clocks inside the composition, so edits
  reach a live session.
- Quick timer: a second tap while its timer is active starts nothing;
  durations are capped at 59:59 (1 h preset dropped) to fit the readout.
- Analog date hand is redrawn at local midnight and on time/zone changes
  (AnalogDateRefresh); updatePeriodMillis back to 0.
- WidgetSync routes each flow only to the widgets that read it.
- Stopwatch widget uses the ElapsedRealtimeClock seam and has a two-row
  minimum height.
- Remove dead quick-timer helpers; share showWorldClockIntent.

app/src/main/res/xml/widget_analog_clock_info.xml

@@ -6,7 +6,7 @@
     android:minResizeHeight="110dp"
     android:targetCellWidth="2"
     android:targetCellHeight="2"
-    android:updatePeriodMillis="1800000"
+    android:updatePeriodMillis="0"
     android:resizeMode="horizontal|vertical"
     android:widgetCategory="home_screen"
     android:description="@string/widget_analog_description"

app/src/main/res/xml/widget_stopwatch_info.xml

@@ -1,9 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
     android:minWidth="140dp"
-    android:minHeight="80dp"
+    android:minHeight="110dp"
     android:minResizeWidth="110dp"
-    android:minResizeHeight="60dp"
+    android:minResizeHeight="110dp"
     android:targetCellWidth="3"
     android:targetCellHeight="2"
     android:updatePeriodMillis="0"