chore(lint): reduce warning debt across core adapters and model clients

src/frontends/tui/minimal.ts

@@ -1,7 +1,7 @@
 import * as readline from 'node:readline';
 import type { ManagedSession } from '../../session/index.js';
 import type { ModelClient, TokenUsage } from '../../models/types.js';
-import type { ModelRouter, ModelTier } from '../../models/router.js';
+import type { ModelRouter } from '../../models/router.js';
 import type { NativeAgent } from '../../backends/native/agent.js';
 import { parseCommand, getHelpText, resolveModelAlias, getCommandCompletions, getCommandTooltip, type Command } from './commands.js';
 import { renderMarkdown } from './markdown.js';
@@ -406,13 +406,13 @@ export class MinimalTui {
           }
         });
       });
-    } catch (error) {
+    } catch {
       // Service might not exist or already stopped, ignore
       console.log(`${colors.gray}Note: ${provider} service not managed by systemd${colors.reset}\n`);
     }
   }
 
-  private async startBackend(provider: string, config: ModelConfig): Promise<void> {
+  private async startBackend(provider: string, _config: ModelConfig): Promise<void> {
     try {
       const { exec } = await import('child_process');
       let serviceName: string;
@@ -454,7 +454,10 @@ export class MinimalTui {
 
     const promptHidden = async (question: string): Promise<string> => {
       const rl = readline.createInterface({ input: process.stdin, output: process.stdout, terminal: true });
-      const rlAny = rl as any;
+      const rlAny = rl as readline.Interface & {
+        stdoutMuted?: boolean;
+        _writeToOutput?: (s: string) => void;
+      };
       rlAny.stdoutMuted = true;
       rlAny._writeToOutput = (s: string) => {
         if (!rlAny.stdoutMuted) {