feat: two-line cards, responsive grid, real uniform font size

BACKLOG.md

@@ -15,13 +15,6 @@ In dark mode the "Clear" button text lightens on hover, giving visual feedback.
 mode and Dan mode it currently does nothing visible. Should have a matching subtle
 highlight (e.g. text darkens, underline appears, or border darkens).
 
-### Admin: user-provided IDs for units and groups
-When creating a unit or group, allow the user to optionally supply their own ID.
-- If the ID field is left empty, auto-generate it by kebab-casing the label (live
-  preview as the user types the label).
-- If the user types into the ID field, stop auto-generating and use what they typed.
-- Validate: IDs must be unique and slug-safe.
-
 ### Admin: allow renaming unit and group IDs
 The edit forms do not currently expose the `id` field for existing units or groups.
 
@@ -46,11 +39,6 @@ Per-group setting controlling whether units are displayed on the front end in:
 Data shape change: add optional `sortOrder?: 'defined' | 'alpha'` to the `Group` type
 (default: `'defined'`).
 
-### Admin: drag-to-reorder units within a group
-Allow units to be reordered within their group via drag-and-drop in the left panel.
-Order is persisted to `units.json`. Only meaningful when the group's `sortOrder` is
-`'defined'`.
-
 ### Admin: unsaved-form guard on "Add Unit" / "Add Group"
 If the user is in the middle of filling out a create/edit form and clicks "+ Add Unit"
 or "+ Add Group", the current form should be auto-saved before opening the new one.