From bba1f7955a3d17520e2d6ff986b6088d11442485 Mon Sep 17 00:00:00 2001
From: Jeff Emmett <jeffemmett@gmail.com>
Date: Wed, 24 Dec 2025 10:43:25 -0500
Subject: [PATCH] fix: prevent stale cache issues with proper no-cache headers
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

- Add no-cache headers for index.html, sw.js, registerSW.js, manifest.webmanifest
- Add skipWaiting and clientsClaim to workbox config for immediate SW updates
- This ensures new deployments are picked up immediately without manual cache clearing

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
---
 nginx.conf     | 27 ++++++++++++++++++++++++++-
 vite.config.ts |  3 +++
 2 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/nginx.conf b/nginx.conf
index fb5b259..6577200 100644
--- a/nginx.conf
+++ b/nginx.conf
@@ -18,7 +18,32 @@ server {
     add_header X-XSS-Protection "1; mode=block" always;
     add_header Referrer-Policy "strict-origin-when-cross-origin" always;
 
-    # Cache static assets
+    # NEVER cache index.html and service worker - always fetch fresh
+    location = /index.html {
+        add_header Cache-Control "no-cache, no-store, must-revalidate";
+        add_header Pragma "no-cache";
+        add_header Expires "0";
+    }
+
+    location = /sw.js {
+        add_header Cache-Control "no-cache, no-store, must-revalidate";
+        add_header Pragma "no-cache";
+        add_header Expires "0";
+    }
+
+    location = /registerSW.js {
+        add_header Cache-Control "no-cache, no-store, must-revalidate";
+        add_header Pragma "no-cache";
+        add_header Expires "0";
+    }
+
+    location = /manifest.webmanifest {
+        add_header Cache-Control "no-cache, no-store, must-revalidate";
+        add_header Pragma "no-cache";
+        add_header Expires "0";
+    }
+
+    # Cache static assets with hashed filenames (immutable)
     location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
         expires 1y;
         add_header Cache-Control "public, immutable";
diff --git a/vite.config.ts b/vite.config.ts
index b54d19f..0d94e02 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -34,6 +34,9 @@ export default defineConfig(({ mode }) => {
         registerType: 'autoUpdate',
         injectRegister: 'auto',
         workbox: {
+          // Force the service worker to take control immediately
+          skipWaiting: true,
+          clientsClaim: true,
           // Cache all static assets
           globPatterns: ['**/*.{js,css,html,ico,png,svg,woff2,wasm}'],
           // Increase the limit for large chunks (Board is ~8MB with tldraw, automerge, etc.)