Add reusable tools and assistant bindings

- Introduce a new `Tool` model and `AssistantToolBinding` for managing reusable tools within the application.
- Implement CRUD operations for tools in the new `tools` route, allowing for the creation, retrieval, updating, and deletion of tools.
- Update the `Assistant` model to include a list of tool IDs, enabling assistants to utilize these tools.
- Enhance the backend routes to synchronize tool bindings with assistants, ensuring proper management of tool associations.
- Add frontend components for tool management, including a tool picker in the assistant configuration, improving user experience in tool selection.
- Create a mobile call page to facilitate video calls, integrating camera and microphone selection for enhanced communication capabilities.
- Update API definitions to include tool-related types and operations, ensuring consistency across the application.
- Add a migration script to create the necessary database tables for tools and bindings, supporting the new functionality.

backend/schemas.py

@@ -7,14 +7,18 @@ JSON 用 camelCase(modelId/interfaceType/apiUrl/apiKey),Python 内部用 snake_c
 
 from __future__ import annotations
 
-from typing import Any, Literal
+from typing import Annotated, Any, Literal, Union
 
-from pydantic import BaseModel, ConfigDict, Field, model_validator
+from pydantic import BaseModel, ConfigDict, Field, field_validator, model_validator
 from pydantic.alias_generators import to_camel
 
 RuntimeMode = Literal["pipeline", "realtime"]
 ModelType = Literal["LLM", "ASR", "TTS", "Realtime", "Embedding", "Agent"]
 AssistantType = Literal["prompt", "workflow", "dify", "fastgpt", "opencode"]
+ToolType = Literal["end_call", "http"]
+ToolStatus = Literal["active", "archived", "draft"]
+ToolParameterType = Literal["string", "number", "integer", "boolean", "object", "array"]
+ToolParameterLocation = Literal["path", "query", "body", "header"]
 
 # 外部应用类型:其 config.apiKey 是该助手私有密钥,读时打码 / 写时哨兵
 EXTERNAL_TYPES = {"dify", "fastgpt", "opencode"}
@@ -57,6 +61,7 @@ class AssistantUpsert(CamelModel):
 
     model_resource_ids: dict[ModelType, str] = Field(default_factory=dict)
     knowledge_base_id: str | None = None
+    tool_ids: list[str] = Field(default_factory=list)
 
     # 瘦类型专属(真列);按 type 取用,无关字段写入时清零
     prompt: str = ""
@@ -74,6 +79,8 @@ class AssistantUpsert(CamelModel):
                 setattr(self, field, "")
         if "graph" not in allowed:
             self.graph = {}
+        if self.type != "prompt":
+            self.tool_ids = []
         # 外部托管大脑只能 cascade,拦住不兼容的 realtime
         if self.runtime_mode == "realtime" and self.type not in REALTIME_CAPABLE_TYPES:
             raise ValueError(f"类型 {self.type} 不支持 realtime 运行模式")
@@ -85,6 +92,69 @@ class AssistantOut(AssistantUpsert):
     updated_at: str | None = None
 
 
+# ---------- 可复用工具 ----------
+class ToolParameter(CamelModel):
+    name: str
+    type: ToolParameterType = "string"
+    location: ToolParameterLocation = "body"
+    description: str = ""
+    required: bool = True
+
+
+class EndCallToolConfig(CamelModel):
+    message_type: Literal["none", "custom"] = "none"
+    custom_message: str = ""
+    capture_reason: bool = True
+
+
+class HttpToolConfig(CamelModel):
+    method: Literal["GET", "POST", "PUT", "PATCH", "DELETE"] = "GET"
+    url: str
+    timeout_seconds: int = Field(default=15, ge=1, le=120)
+    headers: dict[str, str] = Field(default_factory=dict)
+    parameters: list[ToolParameter] = Field(default_factory=list)
+    body: dict[str, Any] = Field(default_factory=dict)
+
+    @field_validator("url")
+    @classmethod
+    def validate_url(cls, value: str) -> str:
+        if not value.startswith(("http://", "https://")):
+            raise ValueError("HTTP 工具 URL 必须使用 http:// 或 https://")
+        return value
+
+
+class EndCallToolDefinition(CamelModel):
+    schema_version: int = 1
+    type: Literal["end_call"] = "end_call"
+    config: EndCallToolConfig = Field(default_factory=EndCallToolConfig)
+
+
+class HttpToolDefinition(CamelModel):
+    schema_version: int = 1
+    type: Literal["http"] = "http"
+    config: HttpToolConfig
+
+
+ToolDefinition = Annotated[
+    Union[EndCallToolDefinition, HttpToolDefinition], Field(discriminator="type")
+]
+
+
+class ToolUpsert(CamelModel):
+    name: str = Field(min_length=1, max_length=128)
+    function_name: str = Field(pattern=r"^[a-z][a-z0-9_]{0,63}$")
+    description: str = Field(default="", max_length=2048)
+    definition: ToolDefinition
+    secrets: dict[str, Any] = Field(default_factory=dict)
+    status: ToolStatus = "active"
+
+
+class ToolOut(ToolUpsert):
+    id: str
+    type: ToolType
+    updated_at: str | None = None
+
+
 # ---------- 知识库 ----------
 class KnowledgeBaseUpsert(CamelModel):
     name: str