🤖 fix: move ai-tokenizer to dependencies (#212)

## Problem

`ai-tokenizer` was in `devDependencies` but is imported at runtime in
`src/utils/main/tokenizer.ts`. This caused "Cannot find module
'ai-tokenizer'" errors in production Electron builds since
devDependencies are excluded from the packaged app.

## Solution

Moved `ai-tokenizer` from `devDependencies` to `dependencies` in
package.json.

_Generated with `cmux`_

Author: ammar-agent

bun.lock

@@ -12,6 +12,7 @@
         "@emotion/react": "^11.14.0",
         "@emotion/styled": "^11.14.1",
         "ai": "^5.0.56",
+        "ai-tokenizer": "^1.0.3",
         "cmdk": "^1.0.0",
         "crc-32": "^1.2.2",
         "diff": "^8.0.2",
@@ -54,7 +55,6 @@
         "@typescript-eslint/eslint-plugin": "^8.44.1",
         "@typescript-eslint/parser": "^8.44.1",
         "@vitejs/plugin-react": "^4.0.0",
-        "ai-tokenizer": "^1.0.3",
         "concurrently": "^8.2.0",
         "dotenv": "^17.2.3",
         "electron": "^38.2.1",

package.json

@@ -60,7 +60,8 @@
     "undici": "^7.16.0",
     "write-file-atomic": "^6.0.0",
     "zod": "^4.1.11",
-    "zod-to-json-schema": "^3.24.6"
+    "zod-to-json-schema": "^3.24.6",
+    "ai-tokenizer": "^1.0.3"
   },
   "devDependencies": {
     "@eslint/js": "^9.36.0",
@@ -79,7 +80,6 @@
     "@typescript-eslint/eslint-plugin": "^8.44.1",
     "@typescript-eslint/parser": "^8.44.1",
     "@vitejs/plugin-react": "^4.0.0",
-    "ai-tokenizer": "^1.0.3",
     "concurrently": "^8.2.0",
     "dotenv": "^17.2.3",
     "electron": "^38.2.1",