fix: encode body of translation updating, reduce p margin in prose

apps/api/src/middlewares/agent-content-type.ts

@@ -1,46 +0,0 @@
-import type { Context, Next } from 'hono';
-import { AGENT_CONTENT_TYPE } from '@cio/utils/constants';
-
-/**
- * The dashboard wraps `/agent/*` write bodies in a base64 envelope —
- * `{"b64":"<base64 of inner JSON>"}` — and tags them with
- * `application/x-cio-agent`. Render fronts our service with its own Cloudflare,
- * whose OWASP managed rules body-inspect every JSON request and 403 anything
- * that looks like SQL injection / XSS / command injection / markdown
- * jailbreak — patterns that AI-generated lesson content, fetched docs, and
- * the conversation history naturally produce. CF cannot pattern-match
- * base64, so the envelope passes inspection. This middleware unwraps the
- * envelope and restores a plain `application/json` body before zValidator
- * (which gates on a `/application\/.+?\+?json/` regex) parses it, so route
- * handlers downstream see the request unchanged.
- */
-export const agentContentTypeRewrite = async (c: Context, next: Next) => {
-  const ct = c.req.header('content-type')?.toLowerCase() ?? '';
-  if (!ct.startsWith(AGENT_CONTENT_TYPE)) {
-    return next();
-  }
-
-  const envelope = await c.req.raw.text();
-  let innerJson: string;
-  try {
-    const parsed = JSON.parse(envelope) as { b64?: string };
-    // Accept either shape during the deploy window:
-    //   - new dashboard:  {"b64":"<base64 of inner JSON>"}  → decode
-    //   - old dashboard:  <inner JSON directly>             → pass through
-    // The old path still risks a WAF 403 but at least keeps requests flowing
-    // until the dashboard rollout catches up.
-    innerJson = typeof parsed.b64 === 'string' ? Buffer.from(parsed.b64, 'base64').toString('utf-8') : envelope;
-  } catch {
-    return c.json({ success: false, error: 'INVALID_AGENT_ENVELOPE', code: 'INVALID_AGENT_ENVELOPE' }, 400);
-  }
-
-  const headers = new Headers(c.req.raw.headers);
-  headers.set('content-type', 'application/json');
-  c.req.raw = new Request(c.req.raw.url, {
-    method: c.req.raw.method,
-    headers,
-    body: innerJson
-  });
-
-  return next();
-};

apps/api/src/middlewares/b64-envelope.ts

@@ -0,0 +1,41 @@
+import type { Context, Next } from 'hono';
+import { CIO_ENVELOPE_CONTENT_TYPE } from '@cio/utils/constants';
+
+/**
+ * Unwraps the base64 envelope used on write endpoints whose bodies contain
+ * HTML or AI-generated content. The dashboard wraps such bodies as
+ * `{"b64":"<base64 of inner JSON>"}` with `Content-Type: application/x-cio-agent`
+ * so Render's Cloudflare WAF (OWASP managed rules) cannot body-inspect the
+ * payload. This middleware decodes the envelope and restores a plain
+ * `application/json` body before zValidator runs.
+ */
+export const b64EnvelopeRewrite = async (c: Context, next: Next) => {
+  const ct = c.req.header('content-type')?.toLowerCase() ?? '';
+  if (!ct.startsWith(CIO_ENVELOPE_CONTENT_TYPE)) {
+    return next();
+  }
+
+  const envelope = await c.req.raw.text();
+  let innerJson: string;
+  try {
+    const parsed = JSON.parse(envelope) as { b64?: string };
+    // Accept either shape during the deploy window:
+    //   - new dashboard:  {"b64":"<base64 of inner JSON>"}  → decode
+    //   - old dashboard:  <inner JSON directly>             → pass through
+    // The old path still risks a WAF 403 but at least keeps requests flowing
+    // until the dashboard rollout catches up.
+    innerJson = typeof parsed.b64 === 'string' ? Buffer.from(parsed.b64, 'base64').toString('utf-8') : envelope;
+  } catch {
+    return c.json({ success: false, error: 'INVALID_B64_ENVELOPE', code: 'INVALID_B64_ENVELOPE' }, 400);
+  }
+
+  const headers = new Headers(c.req.raw.headers);
+  headers.set('content-type', 'application/json');
+  c.req.raw = new Request(c.req.raw.url, {
+    method: c.req.raw.method,
+    headers,
+    body: innerJson
+  });
+
+  return next();
+};

apps/api/src/routes/agent/agent.ts

@@ -4,7 +4,7 @@ import { authMiddleware } from '@api/middlewares/auth';
 import { orgMemberMiddleware } from '@api/middlewares/org-member';
 import { orgAdminMiddleware } from '@api/middlewares/org-admin';
 import { authOrApiKeyMiddleware } from '@api/middlewares/auth-or-api-key';
-import { agentContentTypeRewrite } from '@api/middlewares/agent-content-type';
+import { b64EnvelopeRewrite } from '@api/middlewares/b64-envelope';
 import { handleError, AppError } from '@api/utils/errors';
 import { zValidator } from '@hono/zod-validator';
 import { streamText, stepCountIs, convertToModelMessages } from 'ai';
@@ -690,7 +690,7 @@ const agentCoreRouter = new Hono()
   });
 
 export const agentRouter = new Hono()
-  .use('*', agentContentTypeRewrite)
+  .use('*', b64EnvelopeRewrite)
   .route('/', agentCoreRouter)
   .route('/history', agentHistoryRouter)
   .route('/runs', agentRunsRouter);

apps/api/src/routes/course/lesson-language.ts

@@ -13,12 +13,14 @@ import {
 
 import { Hono } from '@api/utils/hono';
 import type { TLocale } from '@db/types';
+import { b64EnvelopeRewrite } from '@api/middlewares/b64-envelope';
 import { authMiddleware } from '@api/middlewares/auth';
 import { courseMemberMiddleware } from '@api/middlewares/course-member';
 import { handleError } from '@api/utils/errors';
 import { zValidator } from '@hono/zod-validator';
 
 export const lessonLanguageRouter = new Hono()
+  .use('*', b64EnvelopeRewrite)
   /**
    * GET /course/:courseId/lesson/:lessonId/language
    * Gets all language translations for a lesson