feat(FN-2512): add elapsed timer chip to task cards

- Derive task elapsed time from columnMovedAt with updatedAt/createdAt fallbacks and guard against invalid or future timestamps
- Render a clock-based timer chip on in-progress and done cards with accessible labeling and tooltip metadata
- Add TaskCard styles for the timer row/chip using design tokens, including mobile-size adjustments
- Expand TaskCard tests to cover visibility by column, invalid timestamp suppression, boundary label formatting, and 30s live refresh cadence

packages/cli/src/commands/dashboard-tui/state.ts

@@ -113,6 +113,12 @@ export interface AgentRunItem {
   endedAt: string | null;
   status: string;
   triggerDetail?: string;
+  invocationSource?: string;
+  stdoutExcerpt?: string;
+  stderrExcerpt?: string;
+  resultJson?: Record<string, unknown>;
+  // Optional synthetic log lines for tests / alternate data providers.
+  logs?: string[];
 }
 
 // Slim agent detail shape for Agents view detail panel