feat(assistant): #94-#97 historique permanent, sidebar IA, panneau + et bouton rond

backend/bookslm_routes.py

@@ -11,6 +11,7 @@ from pydantic import BaseModel, Field
 
 from backend.agent.loop import run_agent
 from backend.ai_chat import chat_completion, stream_completion
+from backend.ai_history import delete_session, get_session, list_sessions, upsert_session
 from backend.auth.middleware import check_vault_access, require_auth
 from backend.bookslm import (
     build_general_system_prompt,
@@ -605,3 +606,86 @@ async def api_bookslm_agent(
             "X-Accel-Buffering": "no",
         },
     )
+
+
+# ── Persistent conversation history (#95) ─────────────────────────────
+
+
+class BookslmSession(BaseModel):
+    """Full assistant conversation persisted server-side (#95).
+
+    The shape mirrors the client session object so round-tripping is lossless
+    (transient fields such as ``confirmation``/``payload`` are stripped
+    client-side before upload).
+    """
+
+    id: str = Field(description="Stable session id (s-<ts36>-<rand>)")
+    title: str = Field(default="", description="Derived human title")
+    mode: str = Field(default="general", description="'directory', 'documents' or 'general'")
+    vault: str | None = Field(default=None, description="Vault name for the context")
+    directory: str = Field(default="", description="Relative directory path")
+    documents: list[dict[str, str]] = Field(
+        default_factory=list,
+        description="Open documents for the 'documents' mode",
+    )
+    context: str = Field(default="", description="Client context key of the assistant")
+    createdAt: int | None = Field(default=None, description="Creation ISO ms timestamp")
+    updatedAt: int | None = Field(default=None, description="Last update ISO ms timestamp")
+    messages: list[dict[str, Any]] = Field(
+        default_factory=list,
+        description="Conversation turns [{role, content}]",
+    )
+
+
+def _session_user(current_user) -> str:
+    return current_user.get("username") if isinstance(current_user, dict) else ""  # type: ignore[return-value]
+
+
+@router.get("/history", response_model=dict[str, list[dict[str, Any]]])
+async def api_bookslm_history_list(current_user=Depends(require_auth)):
+    """List the user's assistant conversations (summaries, most recent first).
+
+    Messages are not included to keep the list light; fetch the full
+    conversation with ``GET /history/{id}`` when a session is opened.
+    """
+    return {"sessions": list_sessions(_session_user(current_user))}
+
+
+@router.get("/history/{session_id}", response_model=dict[str, Any] | None)
+async def api_bookslm_history_get(
+    session_id: str,
+    current_user=Depends(require_auth),
+):
+    """Return a single full conversation, or 404 when unknown."""
+    session = get_session(_session_user(current_user), session_id)
+    if session is None:
+        raise HTTPException(status_code=404, detail="Conversation not found")
+    return session
+
+
+@router.put("/history/{session_id}", response_model=dict[str, Any])
+async def api_bookslm_history_upsert(
+    session_id: str,
+    session: BookslmSession,
+    current_user=Depends(require_auth),
+):
+    """Create or update a conversation for the current user.
+
+    The body id is forced to the path id so a client never writes under a
+    different key by mistake.
+    """
+    payload = session.model_dump()
+    payload["id"] = session_id
+    stored = upsert_session(_session_user(current_user), payload)
+    if stored is None:
+        raise HTTPException(status_code=400, detail="Invalid session id")
+    return stored
+
+
+@router.delete("/history/{session_id}", response_model=dict[str, bool])
+async def api_bookslm_history_delete(
+    session_id: str,
+    current_user=Depends(require_auth),
+):
+    """Delete a conversation for the current user."""
+    return {"ok": delete_session(_session_user(current_user), session_id)}