fix(widget): Broaden work-runtime keep rule and add widget error handling

R8 full mode strips no-arg constructors from work-runtime classes accessed via

Class.newInstance() reflection (WorkDatabase_Impl, OverwritingInputMerger, etc).

Replace narrow WorkDatabase_Impl keep rule with broad androidx.work.** rule.

Also add @Keep to Hilt WidgetEntryPoint and wrap provideGlance setup in

try-catch so the widget shows an error message instead of spinning forever.

app/proguard/proguard-rules.pro

@@ -1,9 +1,8 @@
 -keep class eu.darken.capod.BuildConfig { *; }
 -dontobfuscate
 
-# Glance pulls work-runtime:2.7.1 → room-runtime:2.2.5 as transitive deps.
-# Room 2.2.5 finds WorkDatabase_Impl via Class.forName() reflection, but its
-# consumer ProGuard rules don't keep _Impl classes, so R8 full mode (AGP 9+) strips it.
-# Remove when Glance upgrades to Room 2.7+ (which uses RoomDatabaseConstructor instead of reflection).
+# work-runtime 2.7.1 (pulled by Glance) uses Class.newInstance() reflection throughout.
+# R8 full mode strips no-arg constructors not reachable by static analysis.
+# Keep all constructors in the work package. Remove when Glance upgrades to work-runtime 2.10+.
 # See: https://issuetracker.google.com/issues/243257364
--keep class androidx.work.impl.WorkDatabase_Impl { *; }
+-keep class androidx.work.** { <init>(...); }