Fix unused code, array mutation bug, and TypeScript errors

[aadityakumarsah]

Description

This issue addresses several bugs, code smells, and TypeScript errors discovered during static analysis (linting and type checking).

1. Unused Imports in Test Files

• File: apps/web/lib/chat-agent-registry.test.ts
• Issue: The imports existsSync and mkdirSync from node:fs are declared but never used in the file, cluttering the import block.

2. Dead Code (Unused Function and Variable)

• File: apps/web/lib/denchclaw-state.ts
• Issue: The function defaultEmailBodyHydrationAttempted is defined but never invoked anywhere in the codebase.
• File: apps/web/lib/active-runs.ts
• Issue: The variable everSentResponseActivity is declared and assigned values in the wireSubscribeOnlyProcess function, but it is never used in that scope.

3. Array Mutation Bug

• File: apps/web/lib/denchclaw-state.ts
• Issue: The code uses Array.from(current).sort(). The sort() method mutates the array in place. While Array.from creates a new array, using .toSorted() is the more modern, idiomatic, and safer approach to ensure arrays are sorted without unintended side effects (as flagged by eslint-plugin-unicorn(no-array-sort)).

4. TypeScript Error in AI Gateway

• File: extensions/dench-ai-gateway/sync-trigger.ts
• Issue: There is a TypeScript error: Element implicitly has an 'any' type because expression of type '"syncTrigger"' can't be used to index type '{}'. This occurs because pluginConfig?.config is not properly typed before attempting to access the ["syncTrigger"] property.

5. Arrow Function Body Formatting and Object Spreads

• File: apps/web/lib/active-runs.test.ts
• Issue: The linter flags single-line arrow function bodies (e.g. subscribeToRun(idA, (e) => { if (e) eventsA.push(e); }, { replay: false });) that lack curly braces after the if statement.
• File: apps/web/lib/active-runs.ts
• Issue: The linter flags a useless fallback in an object spread (...(details ?? {}) where details is already an object).

Proposed Solution

• Remove the unused imports from chat-agent-registry.test.ts.
• Delete the unused defaultEmailBodyHydrationAttempted function from denchclaw-state.ts and the everSentResponseActivity variable from active-runs.ts.
• Replace .sort() with .toSorted() in denchclaw-state.ts.
• Add proper type assertion (as Record<string, unknown>) when accessing the config in sync-trigger.ts to satisfy the TypeScript compiler.
• Add curly braces to the arrow function bodies in active-runs.test.ts.
• Remove the unnecessary ?? {} fallback in the object spread in active-runs.ts.