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/db/schema/clients.ts

@@ -6,7 +6,6 @@ import {
   numeric,
   jsonb,
   index,
-  uniqueIndex,
   primaryKey,
 } from 'drizzle-orm/pg-core';
 import { sql } from 'drizzle-orm';

src/lib/db/schema/relations.ts

@@ -67,7 +67,6 @@ import {
   savedViews,
   scratchpadNotes,
   userNotificationPreferences,
-  currencyRates,
   customFieldDefinitions,
   customFieldValues,
 } from './system';

src/lib/db/schema/system.ts

@@ -8,7 +8,6 @@ import {
   jsonb,
   index,
   uniqueIndex,
-  primaryKey,
 } from 'drizzle-orm/pg-core';
 import { ports } from './ports';
 import { clients } from './clients';
@@ -29,7 +28,7 @@ export const auditLogs = pgTable(
     userAgent: text('user_agent'),
     revertedBy: text('reverted_by'), // user ID if this change was reverted
     revertedAt: timestamp('reverted_at', { withTimezone: true }),
-    revertOf: text('revert_of').references((): any => auditLogs.id),
+    revertOf: text('revert_of').references((): ReturnType<typeof text> => auditLogs.id),
     metadata: jsonb('metadata').default({}),
     createdAt: timestamp('created_at', { withTimezone: true }).notNull().defaultNow(),
   },

src/lib/db/utils.ts

@@ -16,7 +16,7 @@ import { db } from './index';
 export async function withTransaction<T>(
   callback: (tx: typeof db) => Promise<T>,
 ): Promise<T> {
-  return db.transaction(callback as any) as Promise<T>;
+  return db.transaction(callback as unknown as Parameters<typeof db.transaction>[0]) as Promise<T>;
 }
 
 /**
@@ -33,7 +33,7 @@ export async function softDelete<TTable extends PgTable>(
 ): Promise<void> {
   await db
     .update(table)
-    .set({ archived_at: sql`now()` } as any)
+    .set({ archived_at: sql`now()` } as Record<string, unknown>)
     .where(eq(idColumn, id));
 }
 
@@ -51,6 +51,6 @@ export async function restore<TTable extends PgTable>(
 ): Promise<void> {
   await db
     .update(table)
-    .set({ archived_at: null } as any)
+    .set({ archived_at: null } as Record<string, unknown>)
     .where(eq(idColumn, id));
 }