Add the assistant: a chat that drives the MCP tools in-process

A provider set under Settings (OpenAI-compatible; key encrypted in
flow-data/ai.json) turns on an Assistant panel in the sidebar. Each turn runs
the FastMCP tools in-process as the person chatting, streams the rounds over
SSE and keeps one transcript per user. The panel floats on any screen and
shares the editor's lane: a settings panel keeps the top half, the chat the
bottom. The MCP client is now built once, for the endpoint and the chat.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

frontend/src/client/schemas.gen.ts

@@ -1,5 +1,128 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
+export const AIConfigPublicSchema = {
+    properties: {
+        api_base: {
+            type: 'string',
+            title: 'Api Base'
+        },
+        model: {
+            type: 'string',
+            title: 'Model'
+        },
+        max_rounds: {
+            type: 'integer',
+            title: 'Max Rounds'
+        },
+        api_key_set: {
+            type: 'boolean',
+            title: 'Api Key Set'
+        },
+        api_key_masked: {
+            anyOf: [
+                {
+                    type: 'string'
+                },
+                {
+                    type: 'null'
+                }
+            ],
+            title: 'Api Key Masked'
+        }
+    },
+    type: 'object',
+    required: ['api_base', 'model', 'max_rounds', 'api_key_set', 'api_key_masked'],
+    title: 'AIConfigPublic'
+} as const;
+
+export const AIConfigUpdateSchema = {
+    properties: {
+        api_base: {
+            type: 'string',
+            maxLength: 512,
+            minLength: 1,
+            title: 'Api Base'
+        },
+        api_key: {
+            anyOf: [
+                {
+                    type: 'string',
+                    maxLength: 512
+                },
+                {
+                    type: 'null'
+                }
+            ],
+            title: 'Api Key'
+        },
+        model: {
+            type: 'string',
+            maxLength: 128,
+            title: 'Model',
+            default: ''
+        },
+        max_rounds: {
+            type: 'integer',
+            maximum: 50,
+            minimum: 1,
+            title: 'Max Rounds',
+            default: 12
+        }
+    },
+    type: 'object',
+    required: ['api_base'],
+    title: 'AIConfigUpdate'
+} as const;
+
+export const AIModelsBodySchema = {
+    properties: {
+        api_base: {
+            type: 'string',
+            maxLength: 512,
+            minLength: 1,
+            title: 'Api Base'
+        },
+        api_key: {
+            anyOf: [
+                {
+                    type: 'string',
+                    maxLength: 512
+                },
+                {
+                    type: 'null'
+                }
+            ],
+            title: 'Api Key'
+        }
+    },
+    type: 'object',
+    required: ['api_base'],
+    title: 'AIModelsBody'
+} as const;
+
+export const AIStatusSchema = {
+    properties: {
+        available: {
+            type: 'boolean',
+            title: 'Available'
+        },
+        model: {
+            anyOf: [
+                {
+                    type: 'string'
+                },
+                {
+                    type: 'null'
+                }
+            ],
+            title: 'Model'
+        }
+    },
+    type: 'object',
+    required: ['available', 'model'],
+    title: 'AIStatus'
+} as const;
+
 export const AlertsConfigSchema = {
     properties: {
         enabled: {
@@ -382,6 +505,66 @@ export const ChannelSchema = {
     description: 'Somewhere to send an alert.'
 } as const;
 
+export const ChatItemSchema = {
+    properties: {
+        role: {
+            type: 'string',
+            title: 'Role'
+        },
+        content: {
+            anyOf: [
+                {
+                    type: 'string'
+                },
+                {
+                    type: 'null'
+                }
+            ],
+            title: 'Content'
+        },
+        tool_calls: {
+            anyOf: [
+                {
+                    items: {
+                        additionalProperties: true,
+                        type: 'object'
+                    },
+                    type: 'array'
+                },
+                {
+                    type: 'null'
+                }
+            ],
+            title: 'Tool Calls'
+        },
+        ok: {
+            anyOf: [
+                {
+                    type: 'boolean'
+                },
+                {
+                    type: 'null'
+                }
+            ],
+            title: 'Ok'
+        },
+        error: {
+            anyOf: [
+                {
+                    type: 'string'
+                },
+                {
+                    type: 'null'
+                }
+            ],
+            title: 'Error'
+        }
+    },
+    type: 'object',
+    required: ['role'],
+    title: 'ChatItem'
+} as const;
+
 export const DTypeSchema = {
     type: 'string',
     enum: ['float', 'int', 'str', 'bool', 'json', 'series', 'record', 'list', 'artifact', 'image', 'audio', 'video'],
@@ -3608,6 +3791,32 @@ export const TriggerRequestSchema = {
     title: 'TriggerRequest'
 } as const;
 
+export const TurnBodySchema = {
+    properties: {
+        message: {
+            type: 'string',
+            maxLength: 20000,
+            minLength: 1,
+            title: 'Message'
+        },
+        flow: {
+            anyOf: [
+                {
+                    type: 'string',
+                    pattern: '^[a-z][a-z0-9_]*$'
+                },
+                {
+                    type: 'null'
+                }
+            ],
+            title: 'Flow'
+        }
+    },
+    type: 'object',
+    required: ['message'],
+    title: 'TurnBody'
+} as const;
+
 export const UnsubscribeSchema = {
     properties: {
         endpoint: {

frontend/src/client/types.gen.ts

@@ -1,5 +1,30 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
+export type AIConfigPublic = {
+    api_base: string;
+    model: string;
+    max_rounds: number;
+    api_key_set: boolean;
+    api_key_masked: (string | null);
+};
+
+export type AIConfigUpdate = {
+    api_base: string;
+    api_key?: (string | null);
+    model?: string;
+    max_rounds?: number;
+};
+
+export type AIModelsBody = {
+    api_base: string;
+    api_key?: (string | null);
+};
+
+export type AIStatus = {
+    available: boolean;
+    model: (string | null);
+};
+
 /**
  * The whole alerting setup, as stored and as the API sees it.
  */
@@ -107,6 +132,16 @@ export type Channel = {
 
 export type kind = 'ntfy' | 'smtp' | 'webhook' | 'dashboard' | 'webpush';
 
+export type ChatItem = {
+    role: string;
+    content?: (string | null);
+    tool_calls?: (Array<{
+    [key: string]: unknown;
+}> | null);
+    ok?: (boolean | null);
+    error?: (string | null);
+};
+
 /**
  * A dashboard as stored, and as the API hands it over.
  */
@@ -1236,6 +1271,11 @@ export type TriggerRequest = {
     };
 };
 
+export type TurnBody = {
+    message: string;
+    flow?: (string | null);
+};
+
 export type Unsubscribe = {
     endpoint: string;
 };
@@ -1401,6 +1441,34 @@ export type WorkerInfo = {
     ram_mb?: (number | null);
 };
 
+export type AiReadAiConfigResponse = (AIConfigPublic);
+
+export type AiUpdateAiConfigData = {
+    requestBody: AIConfigUpdate;
+};
+
+export type AiUpdateAiConfigResponse = (AIConfigPublic);
+
+export type AiDeleteAiConfigResponse = (unknown);
+
+export type AiListAiModelsData = {
+    requestBody: AIModelsBody;
+};
+
+export type AiListAiModelsResponse = (Array<(string)>);
+
+export type AiReadAiStatusResponse = (AIStatus);
+
+export type AiReadChatResponse = (Array<ChatItem>);
+
+export type AiChatData = {
+    requestBody: TurnBody;
+};
+
+export type AiChatResponse = (unknown);
+
+export type AiClearChatResponse = (Array<ChatItem>);
+
 export type AlertsReadAlertsConfigResponse = (AlertsConfig);
 
 export type AlertsSaveAlertsConfigData = {