feat(seer): Render chart markdown embeds

src/sentry/seer/agent/embed_widgets.generated.json

@@ -128,5 +128,126 @@
         }
       }
     ]
+  },
+  {
+    "name": "chart",
+    "description": "Display numeric data as a compact Sentry-style chart. For line, area, and bar charts, prefer at least three points. Use x_axis \"time\" only with offset-bearing ISO 8601 timestamps and \"category\" for named buckets. For heatmaps, each series is a row, each point is a colored cell, and values must be non-negative. Wheel charts require one category series with 2-12 non-negative points and a positive total. Duration values are milliseconds, percentage values are 0-100, and byte values are raw bytes.",
+    "level": ["block"],
+    "body": {
+      "$schema": "https://json-schema.org/draft/2020-12/schema",
+      "type": "object",
+      "properties": {
+        "title": {
+          "type": "string",
+          "minLength": 1
+        },
+        "subtitle": {
+          "type": "string"
+        },
+        "visualization": {
+          "default": "line",
+          "type": "string",
+          "enum": ["line", "area", "bar", "heatmap", "wheel"]
+        },
+        "x_axis": {
+          "default": "time",
+          "type": "string",
+          "enum": ["time", "category"]
+        },
+        "y_axis_unit": {
+          "default": "number",
+          "type": "string",
+          "enum": ["number", "percentage", "duration", "bytes"]
+        },
+        "y_axis_label": {
+          "type": "string"
+        },
+        "series": {
+          "minItems": 1,
+          "maxItems": 5,
+          "type": "array",
+          "items": {
+            "type": "object",
+            "properties": {
+              "name": {
+                "type": "string"
+              },
+              "data": {
+                "minItems": 1,
+                "maxItems": 200,
+                "type": "array",
+                "items": {
+                  "type": "object",
+                  "properties": {
+                    "x": {
+                      "anyOf": [
+                        {
+                          "type": "string"
+                        },
+                        {
+                          "type": "number"
+                        }
+                      ]
+                    },
+                    "y": {
+                      "type": "number"
+                    }
+                  },
+                  "required": ["x", "y"],
+                  "additionalProperties": false
+                }
+              }
+            },
+            "required": ["name", "data"],
+            "additionalProperties": false
+          }
+        }
+      },
+      "required": ["title", "visualization", "x_axis", "y_axis_unit", "series"],
+      "additionalProperties": false
+    },
+    "examples": [
+      {
+        "label": "Error volume",
+        "data": {
+          "title": "Error volume",
+          "subtitle": "Last 6 hours",
+          "visualization": "area",
+          "x_axis": "time",
+          "y_axis_unit": "number",
+          "series": [
+            {
+              "name": "Errors",
+              "data": [
+                {
+                  "x": "2026-07-30T12:00:00Z",
+                  "y": 12
+                },
+                {
+                  "x": "2026-07-30T13:00:00Z",
+                  "y": 18
+                },
+                {
+                  "x": "2026-07-30T14:00:00Z",
+                  "y": 15
+                },
+                {
+                  "x": "2026-07-30T15:00:00Z",
+                  "y": 31
+                },
+                {
+                  "x": "2026-07-30T16:00:00Z",
+                  "y": 46
+                },
+                {
+                  "x": "2026-07-30T17:00:00Z",
+                  "y": 38
+                }
+              ]
+            }
+          ]
+        }
+      }
+    ]
   }
 ]