diff --git a/docker/vite.standalone.config.ts b/docker/vite.standalone.config.ts
index ac24a4d7..8179e125 100644
--- a/docker/vite.standalone.config.ts
+++ b/docker/vite.standalone.config.ts
@@ -10,6 +10,11 @@ import { defineConfig } from 'vite'
 
 import type { Plugin } from 'vite'
 
+// This config lives in docker/ but is invoked from the repo root via
+// `vite build --config docker/vite.standalone.config.ts`, so __dirname
+// is docker/. All paths must resolve relative to the repo root.
+const ROOT = resolve(__dirname, '..')
+
 // Node.js built-in modules that should be externalized
 const nodeBuiltins = new Set([
   'fs', 'path', 'os', 'events', 'stream', 'util', 'net', 'tls',
@@ -21,7 +26,8 @@ const nodeBuiltins = new Set([
 // Packages that must be externalized because they break when bundled
 // (fastify ecosystem uses internal file resolution that doesn't survive bundling)
 const externalPackages = [
-  'fastify', '@fastify/cors', '@fastify/static'
+  'fastify', '@fastify/cors', '@fastify/static',
+  'agent-teams-controller'
 ]
 
 // Stub native .node addons (ssh2/cpu-features have JS fallbacks)
@@ -57,6 +63,8 @@ export const ipcMain = { handle: noop, on: noop, removeHandler: noop };
 export const shell = { openPath: noop, openExternal: noop };
 export const dialog = { showOpenDialog: async () => ({ canceled: true, filePaths: [] }) };
 export const Notification = class { show() {} };
+export const safeStorage = { isEncryptionAvailable: () => false, encryptString: noop, decryptString: () => '' };
+export const screen = proxyObj;
 export default proxyObj;
 `
   return {
@@ -75,12 +83,13 @@ export default proxyObj;
 }
 
 export default defineConfig({
+  root: ROOT,
   plugins: [nativeModuleStub(), electronStub()],
   resolve: {
     alias: {
-      '@main': resolve(__dirname, 'src/main'),
-      '@shared': resolve(__dirname, 'src/shared'),
-      '@preload': resolve(__dirname, 'src/preload')
+      '@main': resolve(ROOT, 'src/main'),
+      '@shared': resolve(ROOT, 'src/shared'),
+      '@preload': resolve(ROOT, 'src/preload')
     }
   },
   ssr: {
@@ -94,7 +103,7 @@ export default defineConfig({
     ssr: true,
     rollupOptions: {
       input: {
-        index: resolve(__dirname, 'src/main/standalone.ts')
+        index: resolve(ROOT, 'src/main/standalone.ts')
       },
       output: {
         format: 'cjs',
diff --git a/package.json b/package.json
index 1344b645..01672cce 100644
--- a/package.json
+++ b/package.json
@@ -147,6 +147,7 @@
     "react-resizable": "^3.1.3",
     "rehype-highlight": "^7.0.2",
     "rehype-raw": "^7.0.0",
+    "rehype-sanitize": "^6.0.0",
     "remark-gfm": "^4.0.1",
     "remark-parse": "^11.0.0",
     "simple-git": "^3.32.3",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 0c7f5b4f..73bfd119 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -254,6 +254,9 @@ importers:
       rehype-raw:
         specifier: ^7.0.0
         version: 7.0.0
+      rehype-sanitize:
+        specifier: ^6.0.0
+        version: 6.0.0
       remark-gfm:
         specifier: ^4.0.1
         version: 4.0.1
@@ -439,13 +442,13 @@ importers:
         version: 0.11.3(magicast@0.5.2)(pinia@3.0.4(typescript@5.9.3)(vue@3.5.30(typescript@5.9.3)))
       '@vueuse/nuxt':
         specifier: ^10.11.1
-        version: 10.11.1(magicast@0.5.2)(nuxt@3.21.2(@parcel/watcher@2.5.6)(@types/node@25.0.7)(@vue/compiler-sfc@3.5.30)(cac@6.7.14)(db0@0.3.4)(encoding@0.1.13)(eslint@9.39.2(jiti@2.6.1))(idb-keyval@6.2.2)(ioredis@5.10.1)(magicast@0.5.2)(optionator@0.9.4)(rollup-plugin-visualizer@7.0.1(rollup@4.60.0))(rollup@4.60.0)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(typescript@5.9.3)(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))(yaml@2.8.2))(vue@3.5.30(typescript@5.9.3))
+        version: 10.11.1(magicast@0.5.2)(nuxt@3.21.2(@parcel/watcher@2.5.6)(@types/node@25.0.7)(@vue/compiler-sfc@3.5.30)(cac@6.7.14)(db0@0.3.4)(encoding@0.1.13)(eslint@9.39.2(jiti@2.6.1))(idb-keyval@6.2.2)(ioredis@5.10.1)(magicast@0.5.2)(optionator@0.9.4)(rollup-plugin-visualizer@7.0.1(rollup@4.60.0))(rollup@4.60.0)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(typescript@5.9.3)(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))(yaml@2.8.2))(vue@3.5.30(typescript@5.9.3))
       nuxt:
         specifier: ^3.20.2
-        version: 3.21.2(@parcel/watcher@2.5.6)(@types/node@25.0.7)(@vue/compiler-sfc@3.5.30)(cac@6.7.14)(db0@0.3.4)(encoding@0.1.13)(eslint@9.39.2(jiti@2.6.1))(idb-keyval@6.2.2)(ioredis@5.10.1)(magicast@0.5.2)(optionator@0.9.4)(rollup-plugin-visualizer@7.0.1(rollup@4.60.0))(rollup@4.60.0)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(typescript@5.9.3)(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))(yaml@2.8.2)
+        version: 3.21.2(@parcel/watcher@2.5.6)(@types/node@25.0.7)(@vue/compiler-sfc@3.5.30)(cac@6.7.14)(db0@0.3.4)(encoding@0.1.13)(eslint@9.39.2(jiti@2.6.1))(idb-keyval@6.2.2)(ioredis@5.10.1)(magicast@0.5.2)(optionator@0.9.4)(rollup-plugin-visualizer@7.0.1(rollup@4.60.0))(rollup@4.60.0)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(typescript@5.9.3)(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))(yaml@2.8.2)
       nuxt-icon:
         specifier: ^0.6.10
-        version: 0.6.10(magicast@0.5.2)(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))(vue@3.5.30(typescript@5.9.3))
+        version: 0.6.10(magicast@0.5.2)(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))(vue@3.5.30(typescript@5.9.3))
       pinia:
         specifier: ^3.0.4
         version: 3.0.4(typescript@5.9.3)(vue@3.5.30(typescript@5.9.3))
@@ -470,7 +473,7 @@ importers:
         version: 7.4.47
       '@nuxt/eslint':
         specifier: ^1.12.1
-        version: 1.15.2(@typescript-eslint/utils@8.57.1(eslint@9.39.2(jiti@2.6.1))(typescript@5.9.3))(@vue/compiler-sfc@3.5.30)(eslint-import-resolver-node@0.3.9)(eslint@9.39.2(jiti@2.6.1))(magicast@0.5.2)(typescript@5.9.3)(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))
+        version: 1.15.2(@typescript-eslint/utils@8.57.1(eslint@9.39.2(jiti@2.6.1))(typescript@5.9.3))(@vue/compiler-sfc@3.5.30)(eslint-import-resolver-node@0.3.9)(eslint@9.39.2(jiti@2.6.1))(magicast@0.5.2)(typescript@5.9.3)(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))
       eslint:
         specifier: ^9.39.2
         version: 9.39.2(jiti@2.6.1)
@@ -482,7 +485,7 @@ importers:
         version: 1.98.0
       vite-plugin-vuetify:
         specifier: ^2.1.3
-        version: 2.1.3(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))(vue@3.5.30(typescript@5.9.3))(vuetify@3.12.3)
+        version: 2.1.3(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))(vue@3.5.30(typescript@5.9.3))(vuetify@3.12.3)
 
   mcp-server:
     dependencies:
@@ -7043,6 +7046,9 @@ packages:
   hast-util-raw@9.1.0:
     resolution: {integrity: sha512-Y8/SBAHkZGoNkpzqqfCldijcuUKh7/su31kEBp67cFY09Wy0mTRgtsLYsiIxMJxlu0f6AA5SUTbDR8K0rxnbUw==}
 
+  hast-util-sanitize@5.0.2:
+    resolution: {integrity: sha512-3yTWghByc50aGS7JlGhk61SPenfE/p1oaFeNwkOOyrscaOkMGrcW9+Cy/QAIOBpZxP1yqDIzFMR0+Np0i0+usg==}
+
   hast-util-to-jsx-runtime@2.3.6:
     resolution: {integrity: sha512-zl6s8LwNyo1P9uw+XJGvZtdFF1GdAkOg8ujOw+4Pyb76874fLps4ueHXDhXWdk6YHQ6OgUtinliG7RsYvCbbBg==}
 
@@ -9311,6 +9317,9 @@ packages:
   rehype-raw@7.0.0:
     resolution: {integrity: sha512-/aE8hCfKlQeA8LmyeyQvQF3eBiLRGNlfBJEvWH7ivp9sBqs7TNqBL5X3v157rM4IFETqDnIOO+z5M/biZbo9Ww==}
 
+  rehype-sanitize@6.0.0:
+    resolution: {integrity: sha512-CsnhKNsyI8Tub6L4sm5ZFsme4puGfc6pYylvXo1AeqaGbjOYyzNv3qZPwvs0oMJ39eryyeOdmxwUIo94IpEhqg==}
+
   remark-gfm@4.0.1:
     resolution: {integrity: sha512-1quofZ2RQ9EWdeN34S79+KExV1764+wCUGop5CPL1WGdD0ocPpu91lzPGbwWMECpEpd42kJGQwzRfyov9j4yNg==}
 
@@ -12660,20 +12669,20 @@ snapshots:
 
   '@nuxt/devalue@2.0.2': {}
 
-  '@nuxt/devtools-kit@1.7.0(magicast@0.5.2)(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))':
+  '@nuxt/devtools-kit@1.7.0(magicast@0.5.2)(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))':
     dependencies:
       '@nuxt/kit': 3.21.2(magicast@0.5.2)
       '@nuxt/schema': 3.21.2
       execa: 7.2.0
-      vite: 7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2)
+      vite: 5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0)
     transitivePeerDependencies:
       - magicast
 
-  '@nuxt/devtools-kit@3.2.4(magicast@0.5.2)(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))':
+  '@nuxt/devtools-kit@3.2.4(magicast@0.5.2)(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))':
     dependencies:
       '@nuxt/kit': 4.4.2(magicast@0.5.2)
       execa: 8.0.1
-      vite: 7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2)
+      vite: 5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0)
     transitivePeerDependencies:
       - magicast
 
@@ -12688,9 +12697,9 @@ snapshots:
       pkg-types: 2.3.0
       semver: 7.7.4
 
-  '@nuxt/devtools@3.2.4(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))(vue@3.5.30(typescript@5.9.3))':
+  '@nuxt/devtools@3.2.4(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))(vue@3.5.30(typescript@5.9.3))':
     dependencies:
-      '@nuxt/devtools-kit': 3.2.4(magicast@0.5.2)(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))
+      '@nuxt/devtools-kit': 3.2.4(magicast@0.5.2)(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))
       '@nuxt/devtools-wizard': 3.2.4
       '@nuxt/kit': 4.4.2(magicast@0.5.2)
       '@vue/devtools-core': 8.1.0(vue@3.5.30(typescript@5.9.3))
@@ -12718,9 +12727,9 @@ snapshots:
       sirv: 3.0.2
       structured-clone-es: 2.0.0
       tinyglobby: 0.2.15
-      vite: 7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2)
-      vite-plugin-inspect: 11.3.3(@nuxt/kit@4.4.2(magicast@0.5.2))(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))
-      vite-plugin-vue-tracer: 1.3.0(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))(vue@3.5.30(typescript@5.9.3))
+      vite: 5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0)
+      vite-plugin-inspect: 11.3.3(@nuxt/kit@4.4.2(magicast@0.5.2))(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))
+      vite-plugin-vue-tracer: 1.3.0(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))(vue@3.5.30(typescript@5.9.3))
       which: 6.0.1
       ws: 8.20.0
     transitivePeerDependencies:
@@ -12769,10 +12778,10 @@ snapshots:
       - supports-color
       - typescript
 
-  '@nuxt/eslint@1.15.2(@typescript-eslint/utils@8.57.1(eslint@9.39.2(jiti@2.6.1))(typescript@5.9.3))(@vue/compiler-sfc@3.5.30)(eslint-import-resolver-node@0.3.9)(eslint@9.39.2(jiti@2.6.1))(magicast@0.5.2)(typescript@5.9.3)(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))':
+  '@nuxt/eslint@1.15.2(@typescript-eslint/utils@8.57.1(eslint@9.39.2(jiti@2.6.1))(typescript@5.9.3))(@vue/compiler-sfc@3.5.30)(eslint-import-resolver-node@0.3.9)(eslint@9.39.2(jiti@2.6.1))(magicast@0.5.2)(typescript@5.9.3)(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))':
     dependencies:
       '@eslint/config-inspector': 1.5.0(eslint@9.39.2(jiti@2.6.1))
-      '@nuxt/devtools-kit': 3.2.4(magicast@0.5.2)(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))
+      '@nuxt/devtools-kit': 3.2.4(magicast@0.5.2)(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))
       '@nuxt/eslint-config': 1.15.2(@typescript-eslint/utils@8.57.1(eslint@9.39.2(jiti@2.6.1))(typescript@5.9.3))(@vue/compiler-sfc@3.5.30)(eslint-import-resolver-node@0.3.9)(eslint@9.39.2(jiti@2.6.1))(typescript@5.9.3)
       '@nuxt/eslint-plugin': 1.15.2(eslint@9.39.2(jiti@2.6.1))(typescript@5.9.3)
       '@nuxt/kit': 4.4.2(magicast@0.5.2)
@@ -12848,7 +12857,7 @@ snapshots:
     transitivePeerDependencies:
       - magicast
 
-  '@nuxt/nitro-server@3.21.2(db0@0.3.4)(encoding@0.1.13)(idb-keyval@6.2.2)(ioredis@5.10.1)(magicast@0.5.2)(nuxt@3.21.2(@parcel/watcher@2.5.6)(@types/node@25.0.7)(@vue/compiler-sfc@3.5.30)(cac@6.7.14)(db0@0.3.4)(encoding@0.1.13)(eslint@9.39.2(jiti@2.6.1))(idb-keyval@6.2.2)(ioredis@5.10.1)(magicast@0.5.2)(optionator@0.9.4)(rollup-plugin-visualizer@7.0.1(rollup@4.60.0))(rollup@4.60.0)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(typescript@5.9.3)(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))(yaml@2.8.2))(typescript@5.9.3)':
+  '@nuxt/nitro-server@3.21.2(db0@0.3.4)(encoding@0.1.13)(idb-keyval@6.2.2)(ioredis@5.10.1)(magicast@0.5.2)(nuxt@3.21.2(@parcel/watcher@2.5.6)(@types/node@25.0.7)(@vue/compiler-sfc@3.5.30)(cac@6.7.14)(db0@0.3.4)(encoding@0.1.13)(eslint@9.39.2(jiti@2.6.1))(idb-keyval@6.2.2)(ioredis@5.10.1)(magicast@0.5.2)(optionator@0.9.4)(rollup-plugin-visualizer@7.0.1(rollup@4.60.0))(rollup@4.60.0)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(typescript@5.9.3)(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))(yaml@2.8.2))(typescript@5.9.3)':
     dependencies:
       '@nuxt/devalue': 2.0.2
       '@nuxt/kit': 3.21.2(magicast@0.5.2)
@@ -12866,7 +12875,7 @@ snapshots:
       klona: 2.0.6
       mocked-exports: 0.1.1
       nitropack: 2.13.2(encoding@0.1.13)(idb-keyval@6.2.2)
-      nuxt: 3.21.2(@parcel/watcher@2.5.6)(@types/node@25.0.7)(@vue/compiler-sfc@3.5.30)(cac@6.7.14)(db0@0.3.4)(encoding@0.1.13)(eslint@9.39.2(jiti@2.6.1))(idb-keyval@6.2.2)(ioredis@5.10.1)(magicast@0.5.2)(optionator@0.9.4)(rollup-plugin-visualizer@7.0.1(rollup@4.60.0))(rollup@4.60.0)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(typescript@5.9.3)(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))(yaml@2.8.2)
+      nuxt: 3.21.2(@parcel/watcher@2.5.6)(@types/node@25.0.7)(@vue/compiler-sfc@3.5.30)(cac@6.7.14)(db0@0.3.4)(encoding@0.1.13)(eslint@9.39.2(jiti@2.6.1))(idb-keyval@6.2.2)(ioredis@5.10.1)(magicast@0.5.2)(optionator@0.9.4)(rollup-plugin-visualizer@7.0.1(rollup@4.60.0))(rollup@4.60.0)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(typescript@5.9.3)(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))(yaml@2.8.2)
       ohash: 2.0.11
       pathe: 2.0.3
       pkg-types: 2.3.0
@@ -12931,7 +12940,7 @@ snapshots:
       rc9: 3.0.0
       std-env: 3.10.0
 
-  '@nuxt/vite-builder@3.21.2(@types/node@25.0.7)(eslint@9.39.2(jiti@2.6.1))(magicast@0.5.2)(nuxt@3.21.2(@parcel/watcher@2.5.6)(@types/node@25.0.7)(@vue/compiler-sfc@3.5.30)(cac@6.7.14)(db0@0.3.4)(encoding@0.1.13)(eslint@9.39.2(jiti@2.6.1))(idb-keyval@6.2.2)(ioredis@5.10.1)(magicast@0.5.2)(optionator@0.9.4)(rollup-plugin-visualizer@7.0.1(rollup@4.60.0))(rollup@4.60.0)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(typescript@5.9.3)(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))(yaml@2.8.2))(optionator@0.9.4)(rollup-plugin-visualizer@7.0.1(rollup@4.60.0))(rollup@4.60.0)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(typescript@5.9.3)(vue@3.5.30(typescript@5.9.3))(yaml@2.8.2)':
+  '@nuxt/vite-builder@3.21.2(@types/node@25.0.7)(eslint@9.39.2(jiti@2.6.1))(magicast@0.5.2)(nuxt@3.21.2(@parcel/watcher@2.5.6)(@types/node@25.0.7)(@vue/compiler-sfc@3.5.30)(cac@6.7.14)(db0@0.3.4)(encoding@0.1.13)(eslint@9.39.2(jiti@2.6.1))(idb-keyval@6.2.2)(ioredis@5.10.1)(magicast@0.5.2)(optionator@0.9.4)(rollup-plugin-visualizer@7.0.1(rollup@4.60.0))(rollup@4.60.0)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(typescript@5.9.3)(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))(yaml@2.8.2))(optionator@0.9.4)(rollup-plugin-visualizer@7.0.1(rollup@4.60.0))(rollup@4.60.0)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(typescript@5.9.3)(vue@3.5.30(typescript@5.9.3))(yaml@2.8.2)':
     dependencies:
       '@nuxt/kit': 3.21.2(magicast@0.5.2)
       '@rollup/plugin-replace': 6.0.3(rollup@4.60.0)
@@ -12950,7 +12959,7 @@ snapshots:
       magic-string: 0.30.21
       mlly: 1.8.2
       mocked-exports: 0.1.1
-      nuxt: 3.21.2(@parcel/watcher@2.5.6)(@types/node@25.0.7)(@vue/compiler-sfc@3.5.30)(cac@6.7.14)(db0@0.3.4)(encoding@0.1.13)(eslint@9.39.2(jiti@2.6.1))(idb-keyval@6.2.2)(ioredis@5.10.1)(magicast@0.5.2)(optionator@0.9.4)(rollup-plugin-visualizer@7.0.1(rollup@4.60.0))(rollup@4.60.0)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(typescript@5.9.3)(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))(yaml@2.8.2)
+      nuxt: 3.21.2(@parcel/watcher@2.5.6)(@types/node@25.0.7)(@vue/compiler-sfc@3.5.30)(cac@6.7.14)(db0@0.3.4)(encoding@0.1.13)(eslint@9.39.2(jiti@2.6.1))(idb-keyval@6.2.2)(ioredis@5.10.1)(magicast@0.5.2)(optionator@0.9.4)(rollup-plugin-visualizer@7.0.1(rollup@4.60.0))(rollup@4.60.0)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(typescript@5.9.3)(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))(yaml@2.8.2)
       nypm: 0.6.5
       ohash: 2.0.11
       pathe: 2.0.3
@@ -15669,13 +15678,13 @@ snapshots:
 
   '@vueuse/metadata@10.11.1': {}
 
-  '@vueuse/nuxt@10.11.1(magicast@0.5.2)(nuxt@3.21.2(@parcel/watcher@2.5.6)(@types/node@25.0.7)(@vue/compiler-sfc@3.5.30)(cac@6.7.14)(db0@0.3.4)(encoding@0.1.13)(eslint@9.39.2(jiti@2.6.1))(idb-keyval@6.2.2)(ioredis@5.10.1)(magicast@0.5.2)(optionator@0.9.4)(rollup-plugin-visualizer@7.0.1(rollup@4.60.0))(rollup@4.60.0)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(typescript@5.9.3)(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))(yaml@2.8.2))(vue@3.5.30(typescript@5.9.3))':
+  '@vueuse/nuxt@10.11.1(magicast@0.5.2)(nuxt@3.21.2(@parcel/watcher@2.5.6)(@types/node@25.0.7)(@vue/compiler-sfc@3.5.30)(cac@6.7.14)(db0@0.3.4)(encoding@0.1.13)(eslint@9.39.2(jiti@2.6.1))(idb-keyval@6.2.2)(ioredis@5.10.1)(magicast@0.5.2)(optionator@0.9.4)(rollup-plugin-visualizer@7.0.1(rollup@4.60.0))(rollup@4.60.0)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(typescript@5.9.3)(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))(yaml@2.8.2))(vue@3.5.30(typescript@5.9.3))':
     dependencies:
       '@nuxt/kit': 3.21.2(magicast@0.5.2)
       '@vueuse/core': 10.11.1(vue@3.5.30(typescript@5.9.3))
       '@vueuse/metadata': 10.11.1
       local-pkg: 0.5.1
-      nuxt: 3.21.2(@parcel/watcher@2.5.6)(@types/node@25.0.7)(@vue/compiler-sfc@3.5.30)(cac@6.7.14)(db0@0.3.4)(encoding@0.1.13)(eslint@9.39.2(jiti@2.6.1))(idb-keyval@6.2.2)(ioredis@5.10.1)(magicast@0.5.2)(optionator@0.9.4)(rollup-plugin-visualizer@7.0.1(rollup@4.60.0))(rollup@4.60.0)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(typescript@5.9.3)(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))(yaml@2.8.2)
+      nuxt: 3.21.2(@parcel/watcher@2.5.6)(@types/node@25.0.7)(@vue/compiler-sfc@3.5.30)(cac@6.7.14)(db0@0.3.4)(encoding@0.1.13)(eslint@9.39.2(jiti@2.6.1))(idb-keyval@6.2.2)(ioredis@5.10.1)(magicast@0.5.2)(optionator@0.9.4)(rollup-plugin-visualizer@7.0.1(rollup@4.60.0))(rollup@4.60.0)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(typescript@5.9.3)(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))(yaml@2.8.2)
       vue-demi: 0.14.10(vue@3.5.30(typescript@5.9.3))
     transitivePeerDependencies:
       - '@vue/composition-api'
@@ -18670,6 +18679,12 @@ snapshots:
       web-namespaces: 2.0.1
       zwitch: 2.0.4
 
+  hast-util-sanitize@5.0.2:
+    dependencies:
+      '@types/hast': 3.0.4
+      '@ungap/structured-clone': 1.3.0
+      unist-util-position: 5.0.0
+
   hast-util-to-jsx-runtime@2.3.6:
     dependencies:
       '@types/estree': 1.0.8
@@ -20345,27 +20360,27 @@ snapshots:
     dependencies:
       boolbase: 1.0.0
 
-  nuxt-icon@0.6.10(magicast@0.5.2)(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))(vue@3.5.30(typescript@5.9.3)):
+  nuxt-icon@0.6.10(magicast@0.5.2)(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))(vue@3.5.30(typescript@5.9.3)):
     dependencies:
       '@iconify/collections': 1.0.665
       '@iconify/vue': 4.3.0(vue@3.5.30(typescript@5.9.3))
-      '@nuxt/devtools-kit': 1.7.0(magicast@0.5.2)(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))
+      '@nuxt/devtools-kit': 1.7.0(magicast@0.5.2)(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))
       '@nuxt/kit': 3.21.2(magicast@0.5.2)
     transitivePeerDependencies:
       - magicast
       - vite
       - vue
 
-  nuxt@3.21.2(@parcel/watcher@2.5.6)(@types/node@25.0.7)(@vue/compiler-sfc@3.5.30)(cac@6.7.14)(db0@0.3.4)(encoding@0.1.13)(eslint@9.39.2(jiti@2.6.1))(idb-keyval@6.2.2)(ioredis@5.10.1)(magicast@0.5.2)(optionator@0.9.4)(rollup-plugin-visualizer@7.0.1(rollup@4.60.0))(rollup@4.60.0)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(typescript@5.9.3)(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))(yaml@2.8.2):
+  nuxt@3.21.2(@parcel/watcher@2.5.6)(@types/node@25.0.7)(@vue/compiler-sfc@3.5.30)(cac@6.7.14)(db0@0.3.4)(encoding@0.1.13)(eslint@9.39.2(jiti@2.6.1))(idb-keyval@6.2.2)(ioredis@5.10.1)(magicast@0.5.2)(optionator@0.9.4)(rollup-plugin-visualizer@7.0.1(rollup@4.60.0))(rollup@4.60.0)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(typescript@5.9.3)(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))(yaml@2.8.2):
     dependencies:
       '@dxup/nuxt': 0.4.0(magicast@0.5.2)(typescript@5.9.3)
       '@nuxt/cli': 3.34.0(@nuxt/schema@3.21.2)(cac@6.7.14)(magicast@0.5.2)
-      '@nuxt/devtools': 3.2.4(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))(vue@3.5.30(typescript@5.9.3))
+      '@nuxt/devtools': 3.2.4(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))(vue@3.5.30(typescript@5.9.3))
       '@nuxt/kit': 3.21.2(magicast@0.5.2)
-      '@nuxt/nitro-server': 3.21.2(db0@0.3.4)(encoding@0.1.13)(idb-keyval@6.2.2)(ioredis@5.10.1)(magicast@0.5.2)(nuxt@3.21.2(@parcel/watcher@2.5.6)(@types/node@25.0.7)(@vue/compiler-sfc@3.5.30)(cac@6.7.14)(db0@0.3.4)(encoding@0.1.13)(eslint@9.39.2(jiti@2.6.1))(idb-keyval@6.2.2)(ioredis@5.10.1)(magicast@0.5.2)(optionator@0.9.4)(rollup-plugin-visualizer@7.0.1(rollup@4.60.0))(rollup@4.60.0)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(typescript@5.9.3)(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))(yaml@2.8.2))(typescript@5.9.3)
+      '@nuxt/nitro-server': 3.21.2(db0@0.3.4)(encoding@0.1.13)(idb-keyval@6.2.2)(ioredis@5.10.1)(magicast@0.5.2)(nuxt@3.21.2(@parcel/watcher@2.5.6)(@types/node@25.0.7)(@vue/compiler-sfc@3.5.30)(cac@6.7.14)(db0@0.3.4)(encoding@0.1.13)(eslint@9.39.2(jiti@2.6.1))(idb-keyval@6.2.2)(ioredis@5.10.1)(magicast@0.5.2)(optionator@0.9.4)(rollup-plugin-visualizer@7.0.1(rollup@4.60.0))(rollup@4.60.0)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(typescript@5.9.3)(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))(yaml@2.8.2))(typescript@5.9.3)
       '@nuxt/schema': 3.21.2
       '@nuxt/telemetry': 2.7.0(@nuxt/kit@3.21.2(magicast@0.5.2))
-      '@nuxt/vite-builder': 3.21.2(@types/node@25.0.7)(eslint@9.39.2(jiti@2.6.1))(magicast@0.5.2)(nuxt@3.21.2(@parcel/watcher@2.5.6)(@types/node@25.0.7)(@vue/compiler-sfc@3.5.30)(cac@6.7.14)(db0@0.3.4)(encoding@0.1.13)(eslint@9.39.2(jiti@2.6.1))(idb-keyval@6.2.2)(ioredis@5.10.1)(magicast@0.5.2)(optionator@0.9.4)(rollup-plugin-visualizer@7.0.1(rollup@4.60.0))(rollup@4.60.0)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(typescript@5.9.3)(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))(yaml@2.8.2))(optionator@0.9.4)(rollup-plugin-visualizer@7.0.1(rollup@4.60.0))(rollup@4.60.0)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(typescript@5.9.3)(vue@3.5.30(typescript@5.9.3))(yaml@2.8.2)
+      '@nuxt/vite-builder': 3.21.2(@types/node@25.0.7)(eslint@9.39.2(jiti@2.6.1))(magicast@0.5.2)(nuxt@3.21.2(@parcel/watcher@2.5.6)(@types/node@25.0.7)(@vue/compiler-sfc@3.5.30)(cac@6.7.14)(db0@0.3.4)(encoding@0.1.13)(eslint@9.39.2(jiti@2.6.1))(idb-keyval@6.2.2)(ioredis@5.10.1)(magicast@0.5.2)(optionator@0.9.4)(rollup-plugin-visualizer@7.0.1(rollup@4.60.0))(rollup@4.60.0)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(typescript@5.9.3)(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))(yaml@2.8.2))(optionator@0.9.4)(rollup-plugin-visualizer@7.0.1(rollup@4.60.0))(rollup@4.60.0)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(typescript@5.9.3)(vue@3.5.30(typescript@5.9.3))(yaml@2.8.2)
       '@unhead/vue': 2.1.12(vue@3.5.30(typescript@5.9.3))
       '@vue/shared': 3.5.30
       c12: 3.3.3(magicast@0.5.2)
@@ -21542,6 +21557,11 @@ snapshots:
       hast-util-raw: 9.1.0
       vfile: 6.0.3
 
+  rehype-sanitize@6.0.0:
+    dependencies:
+      '@types/hast': 3.0.4
+      hast-util-sanitize: 5.0.2
+
   remark-gfm@4.0.1:
     dependencies:
       '@types/mdast': 4.0.4
@@ -22920,15 +22940,15 @@ snapshots:
       '@types/unist': 3.0.3
       vfile-message: 4.0.3
 
-  vite-dev-rpc@1.1.0(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2)):
+  vite-dev-rpc@1.1.0(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0)):
     dependencies:
       birpc: 2.9.0
-      vite: 7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2)
-      vite-hot-client: 2.1.0(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))
+      vite: 5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0)
+      vite-hot-client: 2.1.0(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))
 
-  vite-hot-client@2.1.0(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2)):
+  vite-hot-client@2.1.0(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0)):
     dependencies:
-      vite: 7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2)
+      vite: 5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0)
 
   vite-node@3.2.4(@types/node@22.19.15)(sass@1.98.0)(terser@5.46.0):
     dependencies:
@@ -23002,7 +23022,7 @@ snapshots:
       optionator: 0.9.4
       typescript: 5.9.3
 
-  vite-plugin-inspect@11.3.3(@nuxt/kit@4.4.2(magicast@0.5.2))(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2)):
+  vite-plugin-inspect@11.3.3(@nuxt/kit@4.4.2(magicast@0.5.2))(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0)):
     dependencies:
       ansis: 4.2.0
       debug: 4.4.3
@@ -23012,29 +23032,29 @@ snapshots:
       perfect-debounce: 2.1.0
       sirv: 3.0.2
       unplugin-utils: 0.3.1
-      vite: 7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2)
-      vite-dev-rpc: 1.1.0(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))
+      vite: 5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0)
+      vite-dev-rpc: 1.1.0(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))
     optionalDependencies:
       '@nuxt/kit': 4.4.2(magicast@0.5.2)
     transitivePeerDependencies:
       - supports-color
 
-  vite-plugin-vue-tracer@1.3.0(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))(vue@3.5.30(typescript@5.9.3)):
+  vite-plugin-vue-tracer@1.3.0(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))(vue@3.5.30(typescript@5.9.3)):
     dependencies:
       estree-walker: 3.0.3
       exsolve: 1.0.8
       magic-string: 0.30.21
       pathe: 2.0.3
       source-map-js: 1.2.1
-      vite: 7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2)
+      vite: 5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0)
       vue: 3.5.30(typescript@5.9.3)
 
-  vite-plugin-vuetify@2.1.3(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))(vue@3.5.30(typescript@5.9.3))(vuetify@3.12.3):
+  vite-plugin-vuetify@2.1.3(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))(vue@3.5.30(typescript@5.9.3))(vuetify@3.12.3):
     dependencies:
       '@vuetify/loader-shared': 2.1.2(vue@3.5.30(typescript@5.9.3))(vuetify@3.12.3)
       debug: 4.4.3
       upath: 2.0.1
-      vite: 7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2)
+      vite: 5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0)
       vue: 3.5.30(typescript@5.9.3)
       vuetify: 3.12.3(typescript@5.9.3)(vite-plugin-vuetify@2.1.3)(vue@3.5.30(typescript@5.9.3))
     transitivePeerDependencies:
@@ -23233,7 +23253,7 @@ snapshots:
       vue: 3.5.30(typescript@5.9.3)
     optionalDependencies:
       typescript: 5.9.3
-      vite-plugin-vuetify: 2.1.3(vite@7.3.1(@types/node@25.0.7)(jiti@2.6.1)(sass@1.98.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))(vue@3.5.30(typescript@5.9.3))(vuetify@3.12.3)
+      vite-plugin-vuetify: 2.1.3(vite@5.4.21(@types/node@25.0.7)(sass@1.98.0)(terser@5.46.0))(vue@3.5.30(typescript@5.9.3))(vuetify@3.12.3)
 
   w3c-keyname@2.2.8: {}
 
diff --git a/src/main/sentry.ts b/src/main/sentry.ts
index 7c0fb2b7..e00ec248 100644
--- a/src/main/sentry.ts
+++ b/src/main/sentry.ts
@@ -5,9 +5,11 @@
  * so that Sentry captures errors from the earliest point possible.
  *
  * When `SENTRY_DSN` is not set (dev / self-builds), everything is a no-op.
+ *
+ * The @sentry/electron/main import is lazy so this module can be safely
+ * loaded in standalone (non-Electron) mode without crashing.
  */
 
-import * as Sentry from '@sentry/electron/main';
 import {
   isValidDsn,
   SENTRY_ENVIRONMENT,
@@ -34,25 +36,40 @@ export function syncTelemetryFlag(enabled: boolean): void {
 }
 
 // ---------------------------------------------------------------------------
-// Init
+// Lazy Sentry import — safe in non-Electron environments
 // ---------------------------------------------------------------------------
 
-const dsn = process.env.SENTRY_DSN;
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+let Sentry: any = null;
 let initialized = false;
 
-if (isValidDsn(dsn)) {
-  Sentry.init({
-    dsn,
-    release: SENTRY_RELEASE,
-    environment: SENTRY_ENVIRONMENT,
-    tracesSampleRate: TRACES_SAMPLE_RATE,
-    sendDefaultPii: false,
+const dsn = process.env.SENTRY_DSN;
 
-    beforeSend(event) {
-      return telemetryAllowed ? event : null;
-    },
-  });
-  initialized = true;
+if (isValidDsn(dsn)) {
+  try {
+    // Dynamic import would be cleaner but top-level await is not available
+    // in all contexts. require() is synchronous and works in both Electron
+    // and Node.js — it simply throws in standalone mode where the electron
+    // module is not resolvable.
+    // eslint-disable-next-line @typescript-eslint/no-require-imports
+    Sentry = require('@sentry/electron/main');
+    Sentry.init({
+      dsn,
+      release: SENTRY_RELEASE,
+      environment: SENTRY_ENVIRONMENT,
+      tracesSampleRate: TRACES_SAMPLE_RATE,
+      sendDefaultPii: false,
+
+      beforeSend(event: unknown) {
+        return telemetryAllowed ? event : null;
+      },
+    });
+    initialized = true;
+  } catch {
+    // @sentry/electron/main requires Electron runtime — not available in
+    // standalone (pure Node.js) mode. All exported helpers are no-ops when
+    // initialized is false, so this is safe to swallow.
+  }
 }
 
 // ---------------------------------------------------------------------------
diff --git a/src/renderer/utils/markdownPlugins.ts b/src/renderer/utils/markdownPlugins.ts
index 9540ea30..a4089d76 100644
--- a/src/renderer/utils/markdownPlugins.ts
+++ b/src/renderer/utils/markdownPlugins.ts
@@ -2,14 +2,54 @@
  * Rehype plugins for markdown rendering (used with react-markdown).
  *
  * - rehype-raw: parse and render inline HTML in markdown
+ * - rehype-sanitize: strip dangerous HTML (scripts, event handlers, etc.)
  * - rehype-highlight: syntax highlighting for code blocks
+ *
+ * Plugin order matters: raw parses inline HTML into hast nodes, sanitize
+ * removes dangerous content, then highlight adds its own safe classes.
  */
 
 import rehypeHighlight from 'rehype-highlight';
 import rehypeRaw from 'rehype-raw';
+import rehypeSanitize, { defaultSchema } from 'rehype-sanitize';
 
-/** Full plugin chain: raw HTML + syntax highlighting */
-export const REHYPE_PLUGINS = [rehypeRaw, rehypeHighlight];
+import type { Options as SanitizeSchema } from 'rehype-sanitize';
+import type { PluggableList } from 'unified';
 
-/** Lightweight chain: raw HTML only (used when highlighting is disabled for large content) */
-export const REHYPE_PLUGINS_NO_HIGHLIGHT = [rehypeRaw];
+/**
+ * Sanitization schema extending the GitHub-based default.
+ *
+ * The default already allows: details, summary, kbd, sub, sup, del, ins,
+ * tables, headings, code, pre, img, a, lists, etc.
+ *
+ * We extend it with additional tags Claude commonly uses in markdown output.
+ */
+const sanitizeSchema: SanitizeSchema = {
+  ...defaultSchema,
+  tagNames: [
+    ...(defaultSchema.tagNames ?? []),
+    'mark', // text highlighting
+    'abbr', // abbreviations
+    'u', // underline
+    'figure', // figures
+    'figcaption', // figure captions
+  ],
+  attributes: {
+    ...defaultSchema.attributes,
+    // Allow title on abbr (for tooltip definitions)
+    abbr: [...(defaultSchema.attributes?.['abbr'] ?? []), 'title'],
+  },
+};
+
+/** Full plugin chain: raw HTML → sanitize → syntax highlighting */
+export const REHYPE_PLUGINS: PluggableList = [
+  rehypeRaw,
+  [rehypeSanitize, sanitizeSchema],
+  rehypeHighlight,
+];
+
+/** Lightweight chain: raw HTML → sanitize only (used when highlighting is disabled for large content) */
+export const REHYPE_PLUGINS_NO_HIGHLIGHT: PluggableList = [
+  rehypeRaw,
+  [rehypeSanitize, sanitizeSchema],
+];