fix: Remove Environment Variable column from table, keep as note

- Remove the Environment Variable column from the AI Agent config table
- Keep environment variable information as a note below the table
- Properly align table columns for better readability

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: andreafalzetti

README.md

@@ -1295,17 +1295,17 @@ To configure the AI agent for your dashboard, you need to add the `agent` config
 }
 ```
 
-| Parameter                   | Type   | Required | Description                                                                    | Environment Variable |
-|-----------------------------|--------|----------|--------------------------------------------------------------------------------|-----------------------|
-| `agent`                     | Object | Yes      | The AI agent configuration object.                                             | `PARSE_DASHBOARD_AGENT_CONFIG` |
-| `agent.models`              | Array  | Yes      | Array of AI model configurations available to the agent.                      | - |
-| `agent.models[*].name`      | String | Yes      | The display name for the model (e.g., `ChatGPT 4.1`).                   | - |
-| `agent.models[*].provider`  | String | Yes      | The AI provider identifier (e.g., "openai").                     | - |
-| `agent.models[*].model`     | String | Yes      | The specific model name from the provider (e.g., `gpt-4.1`).   | - |
-| `agent.models[*].apiKey`    | String | Yes      | The API key for authenticating with the AI provider.                     | - |
+| Parameter                   | Type   | Required | Description                                                              |
+|-----------------------------|--------|----------|--------------------------------------------------------------------------|
+| `agent`                     | Object | Yes      | The AI agent configuration object.                                       |
+| `agent.models`              | Array  | Yes      | Array of AI model configurations available to the agent.                 |
+| `agent.models[*].name`      | String | Yes      | The display name for the model (e.g., `ChatGPT 4.1`).                   |
+| `agent.models[*].provider`  | String | Yes      | The AI provider identifier (e.g., "openai").                            |
+| `agent.models[*].model`     | String | Yes      | The specific model name from the provider (e.g., `gpt-4.1`).            |
+| `agent.models[*].apiKey`    | String | Yes      | The API key for authenticating with the AI provider.                    |
 
 > [!Note]
-> When using the `PARSE_DASHBOARD_AGENT_CONFIG` environment variable, provide the complete agent configuration as a JSON string. For example:
+> The agent configuration can also be set via the `PARSE_DASHBOARD_AGENT_CONFIG` environment variable. Provide the complete agent configuration as a JSON string:
 > ```bash
 > PARSE_DASHBOARD_AGENT_CONFIG='{"models":[{"name":"ChatGPT 4.1","provider":"openai","model":"gpt-4.1","apiKey":"YOUR_API_KEY"}]}'
 > ```