Update README, MIGRATION.md, and CLAUDE.md for current feature set

README.md

@@ -45,11 +45,13 @@ Battery Tracker gives you a single source of truth:
 
 ### Dashboard
 - Overview stats (total / available / installed / retired) + **Low Battery** count when any battery is below 20%
+- **Needs Attention** panel — highlights batteries with low capacity (< 80% of rated) or low percentage (< 20%, requires HA)
 - Charge summary: total charge events and events in the last year
-- Full battery table with client-side filtering by status, brand, size, storage location, and free-text search
+- Full battery table with client-side filtering by status, brand, size, storage location, and free-text search; **retired batteries hidden by default** (change the Status filter to show them)
+- Sortable columns
 - Column picker (Chemistry, Capacity, Storage, Purchase Date, Cycles, Battery %) stored in localStorage
 - Quick-assign available batteries to a device without leaving the page
-- Bulk actions: Unassign, Retire, Delete, Set Field (storage location or brand), Install in Device
+- Bulk actions: Unassign, Retire, Delete, Set Field (storage location or brand), Install in Device, Log Charged
 
 ### History & Charts
 - **Capacity history** — track tested capacity over time with a trend chart; full log in a modal with year filter and pagination
@@ -79,7 +81,7 @@ Battery Tracker gives you a single source of truth:
 | Database | SQLite (dev) / MariaDB (prod) |
 | WSGI server | Waitress |
 | Process manager | systemd user service |
-| Tests | pytest (80 acceptance tests) |
+| Tests | pytest (82 tests) |
 
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