Consolidate 4 widget variants into single receiver with config activity

[mtellblom]

Summary

• Replaced 4 separate GlanceAppWidgetReceiver classes (WidgetPeriodDaysWithLabel*, WidgetPeriodDaysWithoutLabel*) with a single MensinatorWidgetReceiver
• Deleted 3 duplicate XML provider files (mensinator_widget_provider2/3/4.xml) — they were identical except for the description string
• Added WidgetConfigActivity: when the user adds the widget, Android opens this screen so they can choose their preferred design (with/without label × with/without background)
• The chosen design is stored per widget instance in Glance Preferences state (SHOW_LABEL, SHOW_BACKGROUND keys), read directly by BaseWidget at render time
• Simplified all widget-update call sites (BootReceiver, MidnightWorker, PeriodCalculationWidgetUpdater, MainActivity) from iterating a list of 4 receivers to a single BaseWidget().updateAll(context) call
• Removed the WidgetModule Koin module since receiver instances no longer need to be managed by DI

Test plan

• Add widget to home screen — WidgetConfigActivity should appear with 4 design options
• Select each design option and confirm the widget renders correctly (label/no label, background/no background)
• Confirm only one widget entry appears in the system widget picker (not four)
• Add two widget instances with different designs and verify each stores its own preference independently
• Reboot device and confirm widgets still display with their configured designs
• Open the app and confirm widgets update their period data on app start

🤖 Generated with Claude Code

[EmmaTellblom]

I did not like having just 1 widget as option and then having a seperate dialoge for 'settings' of the widget. I would like to have 4 designs that the user can choose from directly. See screen shoot. If possible I would also like to have four images as examples so that users directly can see the difference between the 4 widget designs.

Also see if the widgets can be improved as it looks very cramped on S23 (as seen in example)

[mtellblom]

Addressed the feedback in the latest commit:

• 4 designs back in the picker — reverted to 4 separate receivers so users choose their design directly from the widget picker, no extra dialog
• Proper previews per design — each receiver's BaseWidget calls providePreview() with its own showLabel/showBackground values, so Android 15+ renders the correct visual preview for each of the 4 variants in the picker
• Less cramped layout — replaced the top-aligned LazyColumn in the label variant with a centred Box; bumped the number text to 24sp in the compact variant; set targetCellWidth/targetCellHeight in all XML providers so Android places label widgets at 2×1 cells and compact widgets at 1×1 by default instead of the previous 50dp minimum that forced everything into a tiny square

[mtellblom]

Pushed two more commits, verified on an Android 14 emulator:

1. Compact widgets are now 1×1 (Make compact (no-label) widgets 1x1 instead of 1x2)
The no-label designs were landing on 2 rows in the picker because of a 73dp minHeight; lowered to 40dp so they occupy a single 1×1 cell. The two label designs stay 2×1. Confirmed in the picker: 1×1 squares on top, 2×1 below, all four with rendered previews.

2. New: debug-only widget day-shift (Add debug-only day-shift to test widgets without changing system clock)

What it does

Lets you simulate the day rolling over to test the widget countdown without changing the device's system clock (which otherwise messes with alarms, notifications, and other time-based logic).

How it works

• A new WidgetDebugDayShift helper stores a simple integer "day offset" in SharedPreferences. The widgets compute their countdown from today() = LocalDate.now() + offset instead of now() directly.
• A Debug section appears at the bottom of Settings with -1 / +1 / Reset controls and a live readout ("Simulated day offset: N"). Changing it persists the value and immediately refreshes all widget instances.
• Example: with the next period 10 days away, tapping +1 three times makes every widget show "Period in 7 days" — exactly as if three days had passed.

Release safety

The whole thing is gated behind BuildConfig.DEBUG:

• The Settings section is only shown in debug builds.
• WidgetDebugDayShift.getOffset() returns 0 in release builds, so even a stale persisted value is ignored and production widgets behave exactly as before.

(This required enabling the buildConfig build feature so BuildConfig.DEBUG is generated.)

[EmmaTellblom]

When having multiple widgets the designs get mixed. This should not happen. See screenshot. The 2x1 widget got the design for the 1x1 design.

[mtellblom]

Fixed both reported issues — they turned out to share one root cause. Verified end-to-end on an Android 14 emulator with two different designs placed on the home screen.

Root cause: all four designs were instances of the same BaseWidget class. Glance resolves which widgets to refresh in updateAll() by the GlanceAppWidget's concrete class, so one shared class made that lookup ambiguous:

• Only one widget updated (the debug day-shift / any refresh resolved to a single class mapping).
• Designs got mixed up on app restart — the four concurrent updateAll() calls raced and each re-rendered every placed widget with its own design, so a 2×1 label widget could be drawn as a no-label one and lose its text. The race is why it was intermittent.

Fix: BaseWidget is now abstract, with one concrete subclass per design. Each receiver maps to a distinct GlanceAppWidget class, so updateAll() resolves the correct instances.

Also fixed a crash found while testing: formatDaysUntilPeriod() called until(date) before its null-check, so a fresh install with no tracked period threw NullPointerException and the widget showed "Can't show content". It now renders "?"/"Unknown" gracefully.

Verification (offset starts at 0, next period 11 days out):

• Debug +1 → both widgets update together: 11 → 10 (compact) and Period in 11 days → Period in 10 days (label). ✅
• 5 app restarts → each widget keeps its own design every time, label text always present. ✅