fix(bedtime): switch a recreated rule, keep manual overrides, finish edits

A rule recreated by a pass (deleted in Settings, access re-granted) now
gets its state set even when no boundary was crossed, and the applied
state is recorded only once the system accepted it. Edits that can't move
a boundary (reminder, effects) no longer re-assert the mode over a manual
override, and the screen's writes run on the application scope so leaving
right after a change can't cut it short. A late reminder counts the
minutes actually left, and one slot fire reads the zone once.

An equal bedtime and wake time is now no window instead of a day-long one,
which on every night meant Do Not Disturb never ended, and an empty days
mask in prefs reads as every night, as a backup's does. The rule-id extras
are translated to the bedtime action in MainActivity, keeping the routing
table keyed on the action alone.

Refs #1

app/src/main/res/values/strings.xml

@@ -469,7 +469,7 @@
     <string name="bedtime_effect_hide_aod">Hide the always-on display</string>
     <string name="bedtime_effects_unavailable">Screen effects need Android 15 or later. On this phone, bedtime silences notifications and calls the way Do Not Disturb does.</string>
     <string name="bedtime_open_mode">Open in system settings</string>
-    <string name="bedtime_open_mode_summary">Who can reach you, and more effects, under Settings › Modes. Changes you make there are kept.</string>
+    <string name="bedtime_open_mode_summary">Who can reach you, and more effects, under Settings › Modes. Changes you make there are kept while bedtime stays on.</string>
     <string name="bedtime_alarms_note">Bedtime never silences an alarm or a timer: its mode always lets alarms through.</string>
     <string name="bedtime_wellbeing_note">This is not Digital Wellbeing\'s Bedtime mode. Android lets only the system turn that one on, so if you use it too you will see two modes in Settings › Modes. Use one of them.</string>
     <string name="bedtime_mode_name">Clockula bedtime</string>