fix(web): remove hardcoded maxDuration so Vercel dashboard setting takes effect

Code-level `export const maxDuration = 60` and vercel.json `functions`
block were overriding the dashboard's 300s setting, causing ~100 504
timeouts per day on /api/scene and /api/start. Removing them lets each
Vercel plan use its own default (60s Hobby, 300s Pro) without breaking
self-deployers.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/api/beat-audio/route.ts

@@ -4,9 +4,6 @@ import { NextResponse } from "next/server";
 import { loadEngineConfig } from "@/lib/config";
 
 export const runtime = "nodejs";
-// The synth itself has a 15s per-call ceiling in the engine. 30s here just
-// covers JSON parsing + outbound network buffer.
-export const maxDuration = 30;
 
 export async function POST(req: Request) {
   let body: BeatAudioRequest;

app/api/insert-beat/route.ts

@@ -4,7 +4,6 @@ import { NextResponse } from "next/server";
 import { loadEngineConfig } from "@/lib/config";
 
 export const runtime = "nodejs";
-export const maxDuration = 60;
 
 export async function POST(req: Request) {
   let body: InsertBeatRequest;

app/api/parse-style-image/route.ts

@@ -7,7 +7,6 @@ import { NextResponse } from "next/server";
 import { loadEngineConfig } from "@/lib/config";
 
 export const runtime = "nodejs";
-export const maxDuration = 60;
 
 // Same rationale as /api/vision: the client resizes to 512px max-dim webp
 // (~30-80KB base64 typical) before upload, so 3 MB is generous headroom

app/api/scene/route.ts

@@ -13,11 +13,6 @@ function stripKnownVoices(
 }
 
 export const runtime = "nodejs";
-// Capped at 60 for Vercel Hobby (300 allowed on Pro). The scene pipeline is
-// Writer + CharDesigner×N + Cinematographer + Painter — happy path 9–12s; the
-// tail (cold provider, multiple new characters) can push 30–45s, so 60 is a
-// reasonable headroom on Hobby.
-export const maxDuration = 60;
 
 export async function POST(req: Request) {
   let body: SceneRequest;

app/api/start/route.ts

@@ -4,7 +4,6 @@ import { NextResponse } from "next/server";
 import { loadEngineConfig } from "@/lib/config";
 
 export const runtime = "nodejs";
-export const maxDuration = 60;
 
 // Matches /api/vision and /api/parse-style-image — the user's resized 512px
 // webp is ~30-80 KB; this caps pathological direct-API payloads (which would

app/api/vision/route.ts

@@ -4,7 +4,6 @@ import { NextResponse } from "next/server";
 import { loadEngineConfig } from "@/lib/config";
 
 export const runtime = "nodejs";
-export const maxDuration = 60;
 
 // Browser annotator resizes to 768 wide → typically 200-800 KB base64.
 // 3 MB caps abusive direct-API payloads (which would inflate upstream

vercel.json

@@ -1,11 +1,4 @@
 {
   "$schema": "https://openapi.vercel.sh/vercel.json",
-  "framework": "nextjs",
-  "functions": {
-    "app/api/start/route.ts":       { "maxDuration": 60 },
-    "app/api/scene/route.ts":       { "maxDuration": 60 },
-    "app/api/vision/route.ts":      { "maxDuration": 60 },
-    "app/api/insert-beat/route.ts": { "maxDuration": 60 },
-    "app/api/beat-audio/route.ts":  { "maxDuration": 30 }
-  }
+  "framework": "nextjs"
 }