feat: Web Push notifications

- VAPID-based push via web-push package
- push_subscriptions table: endpoint + keys per user (upsert on conflict)
- GET /api/push/vapid-key — public key for subscribe flow
- POST/DELETE /api/push/subscribe — store/remove subscription
- POST /api/push/test — manual test notification
- Hourly scheduler: notifies users day before homework due + countdown expires
- SW: push event handler shows notification; notificationclick opens /app
- Settings: Push section with enable/disable/test buttons, auto-detects
  browser support and VAPID availability

package-lock.json

@@ -1,13 +1,13 @@
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+  "version": "0.1.0",
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   "requires": true,
   "packages": {
     "": {
       "name": "info1",
-      "version": "1.0.0",
-      "license": "ISC",
+      "version": "0.1.0",
+      "license": "MIT",
       "dependencies": {
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@@ -20,7 +20,8 @@
         "multer": "^2.1.1",
         "otplib": "^13.4.0",
         "qrcode": "^1.5.4",
-        "resend": "^6.12.0"
+        "resend": "^6.12.0",
+        "web-push": "^3.6.7"
       }
     },
     "node_modules/@noble/hashes": {
@@ -119,6 +120,15 @@
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+    "node_modules/agent-base": {
+      "version": "7.1.4",
+      "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-7.1.4.tgz",
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+      "license": "MIT",
+      "engines": {
+        "node": ">= 14"
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     "node_modules/ansi-regex": {
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       "license": "MIT"
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+    "node_modules/asn1.js": {
+      "version": "5.4.1",
+      "resolved": "https://registry.npmjs.org/asn1.js/-/asn1.js-5.4.1.tgz",
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+      "license": "MIT",
+      "dependencies": {
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+        "inherits": "^2.0.1",
+        "minimalistic-assert": "^1.0.0",
+        "safer-buffer": "^2.1.0"
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@@ -212,6 +234,12 @@
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+    "node_modules/bn.js": {
+      "version": "4.12.3",
+      "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.12.3.tgz",
+      "integrity": "sha512-fGTi3gxV/23FTYdAoUtLYp6qySe2KE3teyZitipKNRuVYcBkoP/bB3guXN/XVKUe9mxCHXnc9C4ocyz8OmgN0g==",
+      "license": "MIT"
+    },
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@@ -869,6 +897,15 @@
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+    "node_modules/http_ece": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/http_ece/-/http_ece-1.2.0.tgz",
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+      "license": "MIT",
+      "engines": {
+        "node": ">=16"
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@@ -889,6 +926,19 @@
         "url": "https://opencollective.com/express"
       }
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+    "node_modules/https-proxy-agent": {
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+      "resolved": "https://registry.npmjs.org/https-proxy-agent/-/https-proxy-agent-7.0.6.tgz",
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+      "license": "MIT",
+      "dependencies": {
+        "agent-base": "^7.1.2",
+        "debug": "4"
+      },
+      "engines": {
+        "node": ">= 14"
+      }
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@@ -1134,6 +1184,12 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
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+    "node_modules/minimalistic-assert": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/minimalistic-assert/-/minimalistic-assert-1.0.1.tgz",
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+    },
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@@ -1956,6 +2012,25 @@
         "node": ">= 0.8"
       }
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+    "node_modules/web-push": {
+      "version": "3.6.7",
+      "resolved": "https://registry.npmjs.org/web-push/-/web-push-3.6.7.tgz",
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+      "license": "MPL-2.0",
+      "dependencies": {
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+        "http_ece": "1.2.0",
+        "https-proxy-agent": "^7.0.0",
+        "jws": "^4.0.0",
+        "minimist": "^1.2.5"
+      },
+      "bin": {
+        "web-push": "src/cli.js"
+      },
+      "engines": {
+        "node": ">= 16"
+      }
+    },
     "node_modules/which-module": {
       "version": "2.0.1",
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