fix: resolve Prism syntax highlighting error in peer config modal (#727)

* fix: resolve Prism syntax highlighting error in peer config modal

The PeerViewModal and InterfaceViewModal components displayed:
  Error: The language "undefined" has no grammar.

Root cause: vue-prism-component bundles its own instance of prismjs
(separate from the one imported elsewhere), so registering the ini
grammar on a different Prism instance had no effect on the one
actually performing the highlighting.

Fix: bypass vue-prism-component entirely. Import a single Prism
instance via a new helper (frontend/src/helpers/prism-setup.js) that
also registers the ini grammar, then render highlighted HTML directly
with <pre><code v-html="highlightedConfig">. This ensures the same
Prism object that owns the ini grammar is the one calling highlight().

Affected files:
- frontend/src/helpers/prism-setup.js (new): imports prismjs, defines
  the ini grammar on the Prism instance, re-exports it
- frontend/src/components/PeerViewModal.vue: replaces <Prism> with
  v-html using the shared Prism instance
- frontend/src/components/InterfaceViewModal.vue: same replacement
- frontend/src/main.js: removes the now-unused prism-setup import

Fixes #726

* Revert "fix: resolve Prism syntax highlighting error in peer config modal"

This reverts commit 8d1155224d.

* fix: resolve Prism syntax highlighting error in peer config modal

The PeerViewModal displayed: Error: The language "undefined" has no grammar.

Root cause: Vite bundled prismjs as separate instances per lazy-loaded
chunk, so the ini grammar registered in one instance was invisible to
vue-prism-component which used a different instance.

Fix:
- Add dedupe: ['prismjs'] to vite.config.mjs to force a single Prism
    instance across all chunks
- Add the missing 'prismjs/components/prism-ini' import in
    PeerViewModal.vue (InterfaceViewModal already had it)

frontend/src/components/PeerViewModal.vue

@@ -6,6 +6,7 @@ import { computed, ref, watch } from "vue";
 import { useI18n } from "vue-i18n";
 import { freshInterface, freshPeer, freshStats } from '@/helpers/models';
 import Prism from "vue-prism-component";
+import 'prismjs/components/prism-ini';
 import { notify } from "@kyvg/vue3-notification";
 import { settingsStore } from "@/stores/settings";
 import { profileStore } from "@/stores/profile";

frontend/vite.config.mjs

@@ -10,7 +10,8 @@ export default defineConfig({
   resolve: {
     alias: {
       '@': fileURLToPath(new URL('./src', import.meta.url))
-    }
+    },
+    dedupe: ['prismjs']
   },
   build: {
     //

go.mod

@@ -13,7 +13,7 @@ require (
 	github.com/go-webauthn/webauthn v0.17.4
 	github.com/google/uuid v1.6.0
 	github.com/gorilla/websocket v1.5.3
-	github.com/prometheus-community/pro-bing v0.9.1
+	github.com/prometheus-community/pro-bing v0.8.0
 	github.com/prometheus/client_golang v1.23.2
 	github.com/stretchr/testify v1.11.1
 	github.com/swaggo/swag v1.16.6
@@ -98,7 +98,7 @@ require (
 	go.yaml.in/yaml/v2 v2.4.4 // indirect
 	go.yaml.in/yaml/v3 v3.0.4 // indirect
 	golang.org/x/mod v0.36.0 // indirect
-	golang.org/x/net v0.56.0 // indirect
+	golang.org/x/net v0.55.0 // indirect
 	golang.org/x/sync v0.21.0 // indirect
 	golang.org/x/tools v0.45.0 // indirect
 	golang.zx2c4.com/wireguard v0.0.0-20250521234502-f333402bd9cb // indirect

go.sum

@@ -203,8 +203,8 @@ github.com/pkg/browser v0.0.0-20240102092130-5ac0b6a4141c/go.mod h1:7rwL4CYBLnjL
 github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e/go.mod h1:pJLUxLENpZxwdsKMEsNbx1VGcRFpLqf3715MtcvvzbA=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/prometheus-community/pro-bing v0.9.1 h1:kpuAr6AU2oRtzGihJSUcetHtjc7ku7h6PxeuW9RVrQw=
-github.com/prometheus-community/pro-bing v0.9.1/go.mod h1:z79wYTxAOf6FpTng0QdIhZ3j/Nd5l3+gnFSCIT+SiSQ=
+github.com/prometheus-community/pro-bing v0.8.0 h1:CEY/g1/AgERRDjxw5P32ikcOgmrSuXs7xon7ovx6mNc=
+github.com/prometheus-community/pro-bing v0.8.0/go.mod h1:Idyxz8raDO6TgkUN6ByiEGvWJNyQd40kN9ZUeho3lN0=
 github.com/prometheus/client_golang v1.23.2 h1:Je96obch5RDVy3FDMndoUsjAhG5Edi49h0RJWRi/o0o=
 github.com/prometheus/client_golang v1.23.2/go.mod h1:Tb1a6LWHB3/SPIzCoaDXI4I8UHKeFTEQ1YCr+0Gyqmg=
 github.com/prometheus/client_model v0.6.2 h1:oBsgwpGs7iVziMvrGhE53c/GrLUsZdHnqNwqPLxwZyk=
@@ -305,8 +305,8 @@ golang.org/x/net v0.22.0/go.mod h1:JKghWKKOSdJwpW2GEx0Ja7fmaKnMsbu+MWVZTokSYmg=
 golang.org/x/net v0.24.0/go.mod h1:2Q7sJY5mzlzWjKtYUEXSlBWCdyaioyXzRB2RtU8KVE8=
 golang.org/x/net v0.25.0/go.mod h1:JkAGAh7GEvH74S6FOH42FLoXpXbE/aqXSrIQjXgsiwM=
 golang.org/x/net v0.26.0/go.mod h1:5YKkiSynbBIh3p6iOc/vibscux0x38BZDkn8sCUPxHE=
-golang.org/x/net v0.56.0 h1:Rw8j/hFzGvJUZwNBXnAtf5sVDVt+65SK2C7IxCxZt5o=
-golang.org/x/net v0.56.0/go.mod h1:D3Ku6r+V6JROoZK144D2XfMHFcMq/0zSfLelVTCFKec=
+golang.org/x/net v0.55.0 h1:bcvxaJn3e1U6InsFWt1JUq1aSjnRxLzT2rtD2KfkDF8=
+golang.org/x/net v0.55.0/go.mod h1:L5U2KuzuOe1lY7Z+aWVIKK6qEeJXnXV9yzGA+WCHJww=
 golang.org/x/oauth2 v0.36.0 h1:peZ/1z27fi9hUOFCAZaHyrpWG5lwe0RJEEEeH0ThlIs=
 golang.org/x/oauth2 v0.36.0/go.mod h1:YDBUJMTkDnJS+A4BP4eZBjCqtokkg1hODuPjwiGPO7Q=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=