Calendar: fix Day/3-Day/Week/List task rendering; lighter checkbox; confirm future completes

Calendar timeline views only populated in Month. Fixes:
- Day/3-Day time grid dropped untimed (midnight) tasks and ignored
  recurrence. Now uses occurrences(on:) + hasTime, and adds an all-day
  band for untimed tasks, all-day events, and the day's workout.
- Week showed abstract color bars; now lists real task/event titles
  (up to 4/day + "N more") via a shared cvAgendaItems helper.
- List view and the task-list toggle now use occurrences(on:) so
  recurring tasks appear.

TodayView:
- Slimmer task checkbox (18pt open ring vs 22pt filled donut).
- Confirm before completing a future-dated task (Next 7 Days / Later)
  to prevent accidental completion; today/overdue still toggle instantly.

Bump build to 2.0 (9). Add App Store support-site one-pager.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

KisaniCal.xcodeproj/xcshareddata/xcschemes/KisaniCal.xcscheme

@@ -1,10 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "2620"
-   version = "1.3">
+   LastUpgradeVersion = "1500"
+   version = "1.7">
    <BuildAction
       parallelizeBuildables = "YES"
-      buildImplicitDependencies = "YES">
+      buildImplicitDependencies = "YES"
+      runPostActionsOnFailure = "NO">
       <BuildActionEntries>
          <BuildActionEntry
             buildForTesting = "YES"
@@ -26,7 +27,8 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      shouldUseLaunchSchemeArgsEnv = "YES">
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      onlyGenerateCoverageForSpecifiedTargets = "NO">
       <MacroExpansion>
          <BuildableReference
             BuildableIdentifier = "primary"
@@ -38,6 +40,8 @@
       </MacroExpansion>
       <Testables>
       </Testables>
+      <CommandLineArguments>
+      </CommandLineArguments>
    </TestAction>
    <LaunchAction
       buildConfiguration = "Debug"
@@ -59,6 +63,8 @@
             ReferencedContainer = "container:KisaniCal.xcodeproj">
          </BuildableReference>
       </BuildableProductRunnable>
+      <CommandLineArguments>
+      </CommandLineArguments>
    </LaunchAction>
    <ProfileAction
       buildConfiguration = "Release"
@@ -76,6 +82,8 @@
             ReferencedContainer = "container:KisaniCal.xcodeproj">
          </BuildableReference>
       </BuildableProductRunnable>
+      <CommandLineArguments>
+      </CommandLineArguments>
    </ProfileAction>
    <AnalyzeAction
       buildConfiguration = "Debug">