Qa dashboard UI fixes - #78

…provements

- Add week navigation (prev/next arrows) to Weekly Progress card and chart
- Smooth chart transitions with keepPreviousData instead of flash on refetch
- Fix task names not displaying in time entries listing (task.title → task.name)
- Replace task dropdown with free-text input for employee-defined tasks
- Add text truncation with ellipsis for long task names
- Fix task not updating when editing manual time entry (task_name support in update)
- Only reset approval status on time changes, not task/notes edits
- Support overnight (cross-midnight) time entries in manual entry form

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Conflict: the attendance table header. This branch gave every column an
explicit width; develop restored the Late column behind the owner-only
`canSeeLate` gate. Kept both — Late is back and still gated, and it carries
a width like every other column. Dropped develop's 40%-on-Status hack, which
only existed to absorb the missing Late column's space and is redundant now
that all columns are sized.

`tasks` has only ever had a `name` column, and TimeEntryController serializes
the model directly, so `task.title` was always undefined. Three files declared
it anyway: time/page.tsx typed `title` while reading `name`, which failed the
build, and dashboard/page.tsx read `title` alone, so the timesheet rendered
"No task" for every entry that had one.