FEA-1497: Fix pre-existing lint errors blocking CI (Phase 0)

The CI "Tests" job runs `pnpm lint` as a step (bash -e), so the 19
pre-existing eslint errors on PR #264 failed the whole check before the
test run. Clear them so CI is green.

Unused imports/vars (dead code in 264's renderer + DB layer):
- database/index.ts: drop unused SessionRow/AgentRow/EventRow/
  HookEventPayload type imports.
- DashboardPage.tsx: drop unused Card*/Badge/RankedBar imports and the
  now-orphaned toolUsage/maxToolCount locals.
- ApprovalsPanel.tsx: drop unused CardHeader/CardTitle.
- Topbar.tsx / SettingsPanel.tsx: drop unused useCallback.

eslint config (parserOptions.project parse errors on 4 renderer files):
- src/renderer is Vite-built and excluded from tsconfig.json, so its
  .ts/.d.ts files cannot resolve under the type-aware lint block (project:
  ./tsconfig.json). Add `ignores: ["src/renderer/**"]` to that block so
  renderer files are linted by the recommended (syntactic) config instead
  of erroring; matches the existing tsconfig boundary.

Testing (CI-equivalent, all green locally):
- pnpm install --frozen-lockfile: exit 0
- pnpm -C apps/desktop lint: 0 errors
- pnpm typecheck (-r): exit 0
- pnpm test (-r): exit 0 (0 failures; 14 skips: 13 generated-gated + 2
  documented FEA-1497 retarget-skips)

Risks:
- Renderer (.ts/.tsx) is now linted without type-aware rules
  (no-floating-promises), consistent with it being outside the tsconfig
  program; full renderer type-aware lint + typecheck is a Phase 1 follow-up.
- Import removals are dead-code only; no behavior change.

Author: thadeusb

apps/desktop/eslint.config.js

@@ -7,6 +7,12 @@ export default tseslint.config(
   ...tseslint.configs.recommended,
   {
     files: ["src/**/*.ts"],
+    // src/renderer is built by Vite and is excluded from tsconfig.json, so it
+    // is not part of the type-aware TypeScript program. Exclude it from this
+    // type-checked block too (otherwise its .ts/.d.ts files error with
+    // "parserOptions.project ... file not found"); renderer files are still
+    // linted by the recommended (syntactic) config above.
+    ignores: ["src/renderer/**"],
     languageOptions: {
       parserOptions: {
         project: "./tsconfig.json",

apps/desktop/src/main/database/index.ts

@@ -6,7 +6,7 @@ import { createSessionStore } from "./sessions.js";
 import { createAgentStore } from "./agents.js";
 import { createEventStore } from "./events.js";
 import { createDashboardQueries } from "./dashboard.js";
-import type { DashboardSummary, SessionRow, AgentRow, EventRow, HookEventPayload } from "./types.js";
+import type { DashboardSummary } from "./types.js";
 
 export interface AgentDatabase {
   sessions: ReturnType<typeof createSessionStore>;

apps/desktop/src/renderer/components/approvals/ApprovalsPanel.tsx

@@ -1,7 +1,7 @@
 import { useState, useEffect, useCallback } from "react";
 import { Button } from "@closedloop-ai/design-system/components/ui/button";
 import { Badge } from "@closedloop-ai/design-system/components/ui/badge";
-import { Card, CardContent, CardHeader, CardTitle } from "@closedloop-ai/design-system/components/ui/card";
+import { Card, CardContent } from "@closedloop-ai/design-system/components/ui/card";
 
 interface Approval {
   id: string;

apps/desktop/src/renderer/components/dashboard/DashboardPage.tsx

@@ -1,8 +1,5 @@
 import { useState } from "react";
-import { Card, CardContent, CardHeader, CardTitle } from "@closedloop-ai/design-system/components/ui/card";
-import { Badge } from "@closedloop-ai/design-system/components/ui/badge";
 import { MetricCard } from "@closedloop-ai/design-system/components/ui/primitives/metric-card";
-import { RankedBar } from "@closedloop-ai/design-system/components/ui/primitives/ranked-bar";
 import { MonitorDot, Bot, Zap, Layers } from "lucide-react";
 import { useQueryCache } from "../../hooks/useQueryCache";
 import { ActivityFeedView } from "../feed/ActivityFeedView";
@@ -41,9 +38,6 @@ export function DashboardPage() {
     );
   }
 
-  const toolUsage = analytics?.toolUsage ?? [];
-  const maxToolCount = toolUsage.length > 0 ? toolUsage[0].count : 1;
-
   return (
     <div className="flex flex-col h-full">
       {/* Summary cards */}

apps/desktop/src/renderer/components/layout/Topbar.tsx

@@ -1,5 +1,3 @@
-import { useCallback } from "react";
-
 interface TopbarProps {
   collapsed: boolean;
   onToggleSidebar: () => void;

apps/desktop/src/renderer/components/settings/SettingsPanel.tsx

@@ -1,4 +1,4 @@
-import { useState, useEffect, useCallback } from "react";
+import { useState, useEffect } from "react";
 import { Button } from "@closedloop-ai/design-system/components/ui/button";
 import { Card, CardContent, CardHeader, CardTitle } from "@closedloop-ai/design-system/components/ui/card";