Fix all ESLint errors: remove unused imports, replace any types

- Remove ~60 unused imports and variables across 88 files
- Replace ~80 `any` type annotations with proper types (unknown,
  Record<string, unknown>, or specific types)
- Prefix unused callback args with underscore
- Fix unescaped JSX entities
- Lint now passes cleanly (0 errors, 2 intentional img warnings)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/lib/services/document-templates.ts

@@ -22,7 +22,6 @@ import type {
   UpdateTemplateInput,
   ListTemplatesInput,
   GenerateInput,
-  GenerateAndSendInput,
   GenerateAndSignInput,
 } from '@/lib/validators/document-templates';
 
@@ -343,7 +342,7 @@ export async function resolveTemplate(
 
   // BR-140: Check required merge fields have values
   const missing: string[] = [];
-  for (const [_category, fields] of Object.entries(MERGE_FIELDS)) {
+  for (const [, fields] of Object.entries(MERGE_FIELDS)) {
     for (const field of fields) {
       if (field.required) {
         const value = tokenMap[field.token];
@@ -381,7 +380,7 @@ export async function generateFromTemplate(
   portId: string,
   context: GenerateInput,
   meta: AuditMeta,
-): Promise<{ document: any; file: any }> {
+): Promise<{ document: unknown; file: unknown }> {
   const template = await getTemplateById(templateId, portId);
 
   const resolvedHtml = await resolveTemplate(templateId, { ...context, portId });
@@ -396,7 +395,7 @@ export async function generateFromTemplate(
 
   // Use a simple single-field pdfme template for the HTML body
   const pdfTemplate = {
-    basePdf: 'BLANK_PDF' as any,
+    basePdf: 'BLANK_PDF' as unknown as string,
     schemas: [
       [
         {