fix: self-heal chatbot recipe requests answered as prose, not a tool call (v0.57.1)

The system prompt already told the model to MUST call createRecipe
instead of writing the recipe out — that's a soft rule some models
(especially free-tier ones) still ignore. There was no fallback: if the
model answered in prose, that's just what got returned, no draft card.

Added a detector (looksLikeUnstructuredRecipe: 3+ numbered/bulleted
lines with no tool call) and a forced-tool retry when it fires — same
system+prompt, but toolChoice forced to createRecipe so the model can't
opt out on the second pass. Falls back to a short localized line if the
provider returns no text alongside a forced tool call (some do this by
design). Retry failure just keeps the original prose answer rather than
erroring the whole request.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "epicure",
-  "version": "0.57.0",
+  "version": "0.57.1",
   "private": true,
   "scripts": {
     "dev": "pnpm --filter web dev",