fix(examples): add required ui-chart props to basic.flow.json (flow-lint)

4 charts were missing interpolation + colors — FlowFuse ui-chart renders blank
without them. Added the canonical required-property set. Lint-clean.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

examples/basic.flow.json

@@ -239,7 +239,19 @@
     "action": "append",
     "x": 1170,
     "y": 120,
-    "wires": []
+    "wires": [],
+    "interpolation": "linear",
+    "colors": [
+      "#0095FF",
+      "#FF0000",
+      "#FF7F0E",
+      "#2CA02C",
+      "#A347E1",
+      "#D62728",
+      "#FF9896",
+      "#9467BD",
+      "#C5B0D5"
+    ]
   },
   {
     "id": "monster_basic_chart_total",
@@ -264,7 +276,19 @@
     "action": "append",
     "x": 1180,
     "y": 180,
-    "wires": []
+    "wires": [],
+    "interpolation": "linear",
+    "colors": [
+      "#0095FF",
+      "#FF0000",
+      "#FF7F0E",
+      "#2CA02C",
+      "#A347E1",
+      "#D62728",
+      "#FF9896",
+      "#9467BD",
+      "#C5B0D5"
+    ]
   },
   {
     "id": "monster_basic_chart_bucket",
@@ -289,7 +313,19 @@
     "action": "append",
     "x": 1180,
     "y": 240,
-    "wires": []
+    "wires": [],
+    "interpolation": "linear",
+    "colors": [
+      "#0095FF",
+      "#FF0000",
+      "#FF7F0E",
+      "#2CA02C",
+      "#A347E1",
+      "#D62728",
+      "#FF9896",
+      "#9467BD",
+      "#C5B0D5"
+    ]
   },
   {
     "id": "monster_basic_chart_pulse",
@@ -314,7 +350,19 @@
     "action": "append",
     "x": 1190,
     "y": 300,
-    "wires": []
+    "wires": [],
+    "interpolation": "linear",
+    "colors": [
+      "#0095FF",
+      "#FF0000",
+      "#FF7F0E",
+      "#2CA02C",
+      "#A347E1",
+      "#D62728",
+      "#FF9896",
+      "#9467BD",
+      "#C5B0D5"
+    ]
   },
   {
     "id": "monster_basic_text_status",