fix(tui): resolve lint errors in session dashboard — remove unused imports and prefix unused params

Author: JeremyDev87

apps/mcp-server/src/tui/components/session-dashboard.pure.spec.ts

@@ -12,13 +12,7 @@ import {
   renderSessionDashboard,
   formatDurationMs,
 } from './session-dashboard.pure';
-import type {
-  ToolCallRecord,
-  TddStep,
-  DashboardNode,
-  FileChangeStats,
-  ModeTransition,
-} from '../dashboard-types';
+import type { ToolCallRecord, TddStep, DashboardNode, ModeTransition } from '../dashboard-types';
 
 function makeToolCall(name: string, timestamp = 1000): ToolCallRecord {
   return { agentId: 'a1', toolName: name, timestamp, status: 'completed' };

apps/mcp-server/src/tui/components/session-dashboard.pure.ts

@@ -146,7 +146,7 @@ export function formatDurationMs(ms: number): string {
 /**
  * Render agent timeline as text lines.
  */
-export function renderAgentTimeline(entries: AgentTimelineEntry[], width: number): string[] {
+export function renderAgentTimeline(entries: AgentTimelineEntry[], _width: number): string[] {
   if (entries.length === 0) return ['  (no agents)'];
 
   const nameWidth = Math.min(20, Math.max(...entries.map(e => e.name.length)));

apps/mcp-server/src/tui/hooks/use-dashboard-state.ts

@@ -8,7 +8,6 @@ import type {
   ToolCallRecord,
   ActivitySample,
   ModeTransition,
-  FileChangeStats,
 } from '../dashboard-types';
 import type { TuiEventBus } from '../events';
 import {