cleanup and harden

README.md

@@ -180,7 +180,7 @@ Per-controller actions in the modal:
 
 | Control | Description |
 |---|---|
-| **Date picker** | Choose which day to view |
+| **Date picker** | Choose which day to view (defaults to the browser's local date) |
 | **Badged in by** | Set your on-time cutoff (HH:MM) |
 | **Controller** | Filter the table to one controller, or show All |
 | **Show filtered** | Include filtered tenants in the table (dimmed and tagged) |
@@ -209,6 +209,17 @@ Per-controller actions in the modal:
 > controller the person badged into that day, plus a "MERGED" pill so it's
 > clear the row represents N UniFi UUIDs.
 
+### Interface notes
+
+- On narrow screens, the attendance table automatically changes into stacked
+  row cards with labels for each field, so all columns remain visible without
+  sideways scrolling.
+- Destructive or structural actions such as removing a controller, dissolving a
+  merged person, splitting an identity, and resetting a day use in-app
+  confirmation dialogs instead of browser popups.
+- Toast notifications announce success/failure states; keyboard users can close
+  open dialogs with `Esc`.
+
 ---
 
 ## Merging identities across controllers
@@ -225,9 +236,10 @@ fixes this:
   with matching full names across different controllers. One click confirms
   each suggestion (no auto-apply; you're always in the loop).
 - The same modal lists every merged person below the suggestions, with
-  per-person actions: **Rename**, **Split off** (remove one identity from the
-  group), **Dissolve** (break the whole group up — past badge events are
-  preserved, the identities just become standalone rows again).
+  per-person actions: **Rename** (opens an in-app text dialog), **Split off**
+  (remove one identity from the group), **Dissolve** (break the whole group up —
+  past badge events are preserved, the identities just become standalone rows
+  again).
 
 Once merged, the attendance table: