feat(dashboard): replace per-run table with per-account Mailbox Status view

- Remove noisy "Recent Processing Runs" table from dashboard
- Add per-account AccountStatusRow showing: name, email, OK/Error/Pending
  badge, relative last-check time, inline error message, lifetime counters
- Stats cards: "Emails Forwarded Today" → "Emails Processed" (all-time),
  "Errors" → "Accounts with Errors" (turns gray when 0)
- Remove unused processingRunsApi import (saves one API call on page load)
- "View activity & history →" link to /logs for full drill-down
- Update CHANGELOG.md and docs/TODO.md

Agent-Logs-Url: https://github.com/christianlouis/InboxConverge/sessions/0d97741e-e999-49dd-a8f2-dceac2c1da1f

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>

docs/TODO.md

@@ -4,6 +4,7 @@ Comprehensive task breakdown for repository improvements and production readines
 
 ## ✅ Recently Completed
 
+- [x] **Dashboard redesign**: Replaced noisy "Recent Processing Runs" table with a per-account "Mailbox Status" view showing last-check status (OK/Error/Pending), relative timestamp, error messages, and lifetime counters. Stats cards updated to show all-time processed count and accounts-with-errors count.
 - [x] **Pull Now**: Added "Pull Now" button on Accounts page that immediately queues a `process_mail_account` Celery task via `POST /mail-accounts/{id}/pull-now`. Button shows spinner while in flight and is disabled for inactive accounts.
 - [x] Fixed 21 mypy type errors: `Column[T]` vs native type mismatches in `notification_service.py`, `mail_processor.py`, `auth.py`, `tasks.py`, `providers.py`, `mail_accounts.py`, and `main.py` (`lifespan` parameter rename).
 - [x] **Provider logos rework**: Logos now displayed as full-width banner strips at the top of each account card using `next/image fill + object-contain`. Handles all aspect ratios (1:1 square to 6:1 wordmark) without distortion. Proton Mail added.