refactor: replace _SessionCard with PracticeChantListTile for improve…

[dhakar66]

…d UI consistency and functionality

[greptile-apps]

Confidence Score: 4/5

Safe to merge; the refactor is mechanical and the shared widget is already in use across other screens with no new logic paths introduced.

Both changed files are straightforward: the widget gains opt-in flags with backward-compatible defaults, and the screen swaps an inline card for the shared widget. The only worth-noting side effect is the description text truncating at 2 lines instead of 3 in the chants tab — whether intentional or accidental, it is worth a quick check before landing.

practice_chant_list_tile.dart — verify the maxLines: 2 cap for description text is the intended behaviour for the chants session-picker context.

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