diff --git a/apps/app/src/main.ts b/apps/app/src/main.ts
index 04ebec50..8b66ae9e 100644
--- a/apps/app/src/main.ts
+++ b/apps/app/src/main.ts
@@ -1,3 +1,9 @@
+// Iconify-Tabler runtime data — side-effect import must run before any
+// component renders an Icon, so the @iconify/vue runtime resolves
+// names locally instead of falling back to the api.iconify.design CDN
+// (blocked by our CSP). See plugins/iconify.ts for the bootstrap.
+import '@/plugins/iconify'
+
 import { createApp } from 'vue'
 import { VueQueryPlugin } from '@tanstack/vue-query'
 import { queryClientConfig } from '@/lib/query-client'
diff --git a/apps/app/src/plugins/iconify.ts b/apps/app/src/plugins/iconify.ts
new file mode 100644
index 00000000..f9417dec
--- /dev/null
+++ b/apps/app/src/plugins/iconify.ts
@@ -0,0 +1,24 @@
+// Iconify-Tabler runtime bootstrap — introduced in F3.5 to make
+// @iconify/vue's <Icon> render real SVG paths from local data instead
+// of fetching individual icons from https://api.iconify.design/ at
+// runtime. The CSP blocks that origin, so the previous behaviour was
+// an empty <svg viewBox="0 0 16 16"></svg> for every Tabler icon used
+// in the PrimeVue side of the parallel-mode app.
+//
+// This file is a separate concern from src/plugins/iconify/index.ts +
+// icons.css, which exists to serve the Vuetify side: Vuexy's @core
+// `<VIcon icon="tabler-X" />` adapter renders via the i-tabler-* CSS
+// classes those files inject, and Vuetify never touches the @iconify
+// /vue runtime. The two systems must coexist until F6 retires
+// Vuetify, after which the legacy plugins/iconify/ directory can be
+// deleted alongside it.
+//
+// Imported as a side effect at the top of main.ts, so addCollection
+// runs before any component renders an Icon. The whole Tabler set
+// (~1.9 MB uncompressed JSON / ~400 KB gzipped) is loaded eagerly;
+// per-icon imports are a future optimisation, not in F3.5 scope.
+
+import { addCollection } from '@iconify/vue'
+import tablerIcons from '@iconify-json/tabler/icons.json'
+
+addCollection(tablerIcons)