feat(neural): lite int4 + 2.1 in the demo, index pinned to v3

The dropdown leads with the browser-budget artifact (95MB int4 depth-cut
student) and gains the 2.1 rung; the asset index pin moves to index-v3
(22-model surface).

Author: ronaldtse

e2e/e3-debug.mjs

@@ -4,7 +4,7 @@ const p = await b.newPage()
 await p.goto("https://interscript.org/neural", { waitUntil: "networkidle" })
 const res = await p.evaluate(async () => {
   try {
-    const r = await fetch("https://github.com/interscript/interscript-ml/releases/download/index-v2/models-index.yaml.sha256")
+    const r = await fetch("https://github.com/interscript/interscript-ml/releases/download/index-v3/models-index.yaml.sha256")
     return `ok ${r.status}`
   } catch (e) { return `FAIL ${e.message} | ${e.cause?.message ?? ""}` }
 })

src/pages/neural.astro

@@ -16,6 +16,8 @@ import Base from "../layouts/Base.astro"
 
     <label for="model">Model</label>
     <select id="model">
+      <option value="ara-diac-layerdrop-1.0-int4">Arabic diacritization — lite (int4, 95 MB)</option>
+      <option value="ara-diac-small-2.1-int8">Arabic diacritization — 2.1 (int8, 264 MB)</option>
       <option value="ara-diac-small-2.0-int8">Arabic diacritization — 2.0 (int8, 264 MB)</option>
       <option value="ara-diac-small-1.0-int8">Arabic diacritization — 1.0 (int8, 264 MB)</option>
       <option value="tha-g2p-small-1.0">Thai G2P — small (int8, 202 MB)</option>
@@ -89,7 +91,7 @@ import Base from "../layouts/Base.astro"
 <script>
   import { imf } from "interscript/ml"
 
-  const ASSET_INDEX = "https://api.interscript.org/v1/assets/index-v2/models-index.yaml"
+  const ASSET_INDEX = "https://api.interscript.org/v1/assets/index-v3/models-index.yaml"
 
   const $ = (id: string) => document.getElementById(id)!
   let current: { dispose?(): Promise<void> } | null = null