feat: chat — les posts affichent le markdown rendu comme un document, code coloré #193

backend/file_chat.py

@@ -29,6 +29,8 @@ from urllib.parse import urljoin, urlparse
 
 import httpx
 
+from backend.render import _render_markdown
+
 logger = logging.getLogger("obsigate.file_chat")
 
 CHAT_DIR = Path("data/chats")
@@ -96,8 +98,28 @@ def _write(file: Path, doc: dict[str, Any]) -> None:
 
 
 def get_messages(vault: str, path: str) -> list[dict[str, Any]]:
-    """Return the chat history for *(vault, path)* (chronological)."""
-    return list(_read(vault, path).get("messages", []))
+    """Return the chat history for *(vault, path)* (chronological).
+
+    Every message carries its rendered ``html`` (#193): same markdown pipeline
+    as a document (mistune + sanitizer), computed on read so a template change
+    applies to the whole history without rewriting the JSON store.
+    """
+    return [_decorate(m, vault) for m in _read(vault, path).get("messages", [])]
+
+
+def _decorate(msg: dict[str, Any], vault: str) -> dict[str, Any]:
+    """Return a copy of *msg* with its sanitized markdown ``html`` (#193).
+
+    The stored message is left untouched (``html`` is never persisted). A
+    rendering failure must never break the chat: the message goes out with an
+    empty ``html`` and the client falls back to plain text.
+    """
+    try:
+        html = _render_markdown(msg.get("text", ""), vault)
+    except Exception as e:  # pragma: no cover - defensive
+        logger.warning("chat markdown rendering failed: %s", e)
+        html = ""
+    return {**msg, "html": html}
 
 
 def add_message(
@@ -147,7 +169,7 @@ def _append(
             messages = messages[-MAX_MESSAGES:]
         doc["messages"] = messages
         _write(_chat_file(vault, path), doc)
-    return msg
+    return _decorate(msg, vault)  # #193 — le html part avec l'écho SSE
 
 
 # --- #192 : accusé de réception ---------------------------------------------

backend/schemas.py

@@ -166,6 +166,13 @@ class ChatMessageItem(BaseModel):
         default=None,
         description="Link preview card {url, title, description, image, site} (#191)",
     )
+    html: str = Field(
+        default="",
+        description=(
+            "Rendered (mistune + sanitized) HTML of ``text``, like a document "
+            "preview — tables, lists, fenced code blocks (#193)"
+        ),
+    )
 
 
 class ChatHistoryResponse(BaseModel):