This commit introduces several improvements to the Ollama model management modal:
- Adds a cancel button to the model pulling operation, using the existing 'x' button pattern.
- Adds a cancel button to the "Update All" models operation, allowing the user to cancel the update for the currently processing model.
- Cleans up toast notifications when updating all models. A single toast is now shown at the beginning and a summary toast at the end, preventing notification spam.
- Refactors the `ManageOllama.svelte` component to support these new cancellation features.
- Adds tooltips to all buttons in the modal to improve clarity.
- Disables buttons when their corresponding input fields are empty to prevent accidental clicks.