Day sheet dialogs (disapprove, justify): moved the async controller call
inside each dialog so loading state is owned there — button shows a
spinner and is disabled while the RPC is in flight; errors display inline
instead of via a snackbar after dialog close.
Detail screen (approve): added _approvingSheet bool; Approve button shows
CircularProgressIndicator while in flight. On success shows an AlertDialog
"Sheet Approved" with a check icon instead of silently updating state.
Approvals tab (bulk approve): upgraded post-approve feedback from a
snackbar to a success AlertDialog showing the count of approved sheets
and any skipped ones.
Day sheets tab (submit): added confirmation AlertDialog before the
existing submit flow so programmers don't accidentally submit mid-day.
Co-Authored-By: claude-flow <ruv@ruv.net>
approvedSnapshot is only populated at approval time; pending and disapproved
sheets had null snapshot so the card always displayed 0m · 0 tasks.
Now totalSecs/taskCount are passed as nullable params from the parent; the
card renders — when no snapshot is available yet.
Also accept camelCase 'daySheets' URL param in parseProgrammerTasksTab
alongside the existing hyphenated 'day-sheets' spelling.
Co-Authored-By: claude-flow <ruv@ruv.net>
redz1029