Clean up API tech debt: remove unused refactor code

Deleted unused code from incomplete refactor:
- api/src/http/ (routes, schemas, plugins) - never wired up
- api/src/services/ - only used by deleted routes
- api/src/infrastructure/container.ts, database/, external/
- api/src/core/errors/, result.ts, types/

Consolidated configuration:
- Deleted api/config.ts, now using api/src/config/env.ts
- Routes now import from src/config/env.js and src/infrastructure/supabase.js

Fixed ESM imports:
- Added .js extensions to all src/ imports for consistency

The API now has a clean structure:
- api/routes/ - working routes (use simple JSON schemas)
- api/middleware/ - auth plugin
- api/schemas/, api/utils/ - shared code
- api/src/config/ - Zod-validated env
- api/src/infrastructure/ - supabase client, logging
- api/src/core/plugins/ - error handler, request context

Author: eldinmiller

api/config.ts

@@ -6,7 +6,7 @@
 
 import { FastifyPluginAsync, FastifyRequest, FastifyReply } from 'fastify'
 import fp from 'fastify-plugin'
-import { createSupabaseClient } from '../config.js'
+import { createSupabaseClient } from '../src/infrastructure/supabase.js'
 import type { UserProfile } from '../types.js'
 
 const authPluginImpl: FastifyPluginAsync = async (fastify) => {

api/middleware/auth.ts

@@ -6,7 +6,11 @@
 
 import { FastifyPluginAsync, FastifyReply } from 'fastify'
 import { createClient } from '@supabase/supabase-js'
-import { createSupabaseClient, SUPABASE_URL, SUPABASE_KEY, SUPABASE_SERVICE_KEY } from '../config.js'
+import { createSupabaseClient } from '../src/infrastructure/supabase.js'
+import { env } from '../src/config/env.js'
+
+// Destructure for backwards compatibility
+const { SUPABASE_URL, SUPABASE_KEY, SUPABASE_SERVICE_KEY } = env
 import { schemas } from '../schemas/index.js'
 
 // Helper to send error responses without TypeScript complaining about schema types

api/routes/auth.ts

@@ -6,7 +6,7 @@
 
 import { FastifyPluginAsync, FastifyReply } from 'fastify'
 import crypto from 'crypto'
-import { SIGNED_URL_EXPIRY } from '../config.js'
+import { SIGNED_URL_EXPIRY } from '../src/config/env.js'
 import { schemas } from '../schemas/index.js'
 import { computeHash, getFileTypeFromExtension, triggerWebhooks } from '../utils/index.js'
 import type { FileRecord } from '../types.js'

api/routes/files.ts

@@ -26,3 +26,6 @@ export function validateEnv(): Env {
 }
 
 export const env = validateEnv();
+
+// Constants
+export const SIGNED_URL_EXPIRY = 3600; // 1 hour

api/src/config/env.ts

@@ -1,4 +1 @@
-export * from './errors';
-export * from './types';
-export * from './result';
-export * from './plugins';
+export * from './plugins';