Flow canvas draws panel I/O ports as panel:<id>:<port> endpoints that open their panel in the Panels dialog

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WgBfkm4rCmtd1T4vHWjEPx

backend/tests/flow/test_endpoints.py

@@ -10,8 +10,10 @@ from pathlib import Path
 import pytest
 
 from fluksio.api.routes.flows import _endpoints
+from fluksio.core.config import settings
 from fluksio.flow.controller import FlowController
 from fluksio.flow.messages import DType, MessageSpec
+from fluksio.flow.panels import PanelDef, PanelPort, PanelsConfig, write_config
 from fluksio.flow.schemas import FlowDef, NodeDef
 from fluksio.flow.store import FlowStore
 
@@ -109,3 +111,35 @@ def test_the_wiring_index_is_read_once_per_store_revision(controller):
     controller.store.write_flow(FlowDef(name="shed", nodes=[]))
     _endpoints(controller, controller.store.read_flow("house"))
     assert reads == 2
+
+
+def test_a_panel_port_is_drawn_on_the_side_it_wires(controller, tmp_path, monkeypatch):
+    monkeypatch.setattr(settings, "PANELS_FILE", tmp_path / "panels.json")
+    write_config(
+        PanelsConfig(
+            panels=[
+                PanelDef(
+                    id="hall",
+                    title="Hall",
+                    io=[
+                        PanelPort(port="gpio.4", message="house.temp", direction="in"),
+                        PanelPort(
+                            port="backlight", message="house.temp", direction="out"
+                        ),
+                        PanelPort(port="mic", message="garage.open", direction="in"),
+                    ],
+                )
+            ]
+        )
+    )
+
+    endpoints = {
+        one.id: one
+        for one in _endpoints(controller, controller.store.read_flow("house"))
+    }
+
+    # The id is what the device publishes under, so its edges pulse for it.
+    assert endpoints["panel:hall:gpio.4"].provides == ["house.temp"]
+    assert endpoints["panel:hall:backlight"].requires == ["house.temp"]
+    assert endpoints["panel:hall:backlight"].detail == "Hall"
+    assert "panel:hall:mic" not in endpoints