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specs/001-fix-ui-ws-validation/data-model.md

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+# Data Model: Fix UI Styling, WebSocket Port Mismatch, and URL Validation
+
+## Entities
+
+### ServiceConnection
+Represents the configuration for an external service.
+
+| Field | Type | Description | Validation |
+|-------|------|-------------|------------|
+| `base_url` | `AnyHttpUrl` | The base URL of the service. | Normalized to include `/api/v1` if missing. |
+| `name` | `string` | Friendly name for the connection. | Required. |
+| `status` | `string` | Connection status (connected, failed, etc.). | Read-only. |
+
+### TaskLogMessage
+The structure of messages sent over the WebSocket for real-time logs.
+
+| Field | Type | Description |
+|-------|------|-------------|
+| `task_id` | `string` | Unique identifier for the task. |
+| `message` | `string` | The log message text. |
+| `timestamp` | `datetime` | When the log was generated. |
+| `level` | `string` | Log level (INFO, ERROR, etc.). |
+
+## State Transitions
+
+### Connection Validation
+1. User inputs `base_url`.
+2. System validates URL format.
+3. System checks for `/api/v1` suffix.
+4. If missing, system appends `/api/v1`.
+5. System attempts connection and updates `status`.