Restore approved state (tree of 4effcc7 "Added LICENSE")

Roll the working tree back to the last approved shape, before the post-LICENSE span that false-greened the AFI parity matrix with symbol-presence probes and smuggled an unauthorized SQLAlchemy dependency into FastAPI's Shapes binding.

Forward commit, not a history rewrite — the six commits since 4effcc7 stay in the log as the record of what happened.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

frontends/mizan-base/src/index.ts

@@ -386,18 +386,6 @@ async function resolveHeaders(): Promise<Record<string, string>> {
     }
 }
 
-/** Browser-safe `File` check — `File` is undefined under Node/SSR. */
-function isFile(value: unknown): boolean {
-    return typeof File !== 'undefined' && value instanceof File
-}
-
-/** True when any arg is a file (or an array containing a file). */
-function hasFileArg(args: Record<string, any>): boolean {
-    return Object.values(args).some(
-        (v) => isFile(v) || (Array.isArray(v) && v.some(isFile)),
-    )
-}
-
 /**
  * Default Mizan transport — POST `${baseUrl}/call/` and GET
  * `${baseUrl}/ctx/${name}/`. Compatible with `mizan-fastapi`,
@@ -409,38 +397,13 @@ export function httpTransport(): MizanTransport {
     return {
         async call(functionName, args) {
             const headers = await resolveHeaders()
-
-            // File-typed args switch the call to multipart/form-data: `fn` and a
-            // JSON `args` part for the non-file fields, plus one part per file
-            // (an array field repeats its part). Otherwise JSON as usual. The
-            // server reconstructs the args dict by merging the file parts back in.
-            let body: BodyInit
-            if (hasFileArg(args)) {
-                const form = new FormData()
-                form.append('fn', functionName)
-                const jsonArgs: Record<string, any> = {}
-                for (const [key, value] of Object.entries(args)) {
-                    if (isFile(value)) {
-                        form.append(key, value)
-                    } else if (Array.isArray(value) && value.some(isFile)) {
-                        for (const item of value) form.append(key, item as Blob)
-                    } else {
-                        jsonArgs[key] = value
-                    }
-                }
-                form.append('args', JSON.stringify(jsonArgs))
-                body = form
-                // Content-Type is set by the browser (with the multipart boundary).
-            } else {
-                headers['Content-Type'] = 'application/json'
-                body = JSON.stringify({ fn: functionName, args })
-            }
+            headers['Content-Type'] = 'application/json'
 
             const res = await fetch(`${config.baseUrl}/call/`, {
                 method: 'POST',
                 headers,
                 credentials: 'same-origin',
-                body,
+                body: JSON.stringify({ fn: functionName, args }),
             })
             if (!res.ok) throw new MizanError(res.status, await res.text())
             return res.json()