Improve SwiftPaste component styling to better match the brand

### Description

The layout and style of the main SwiftPaste component do not currently align with the rest of the extension, including the Options and Extension interface. This inconsistency in styling creates a disjointed user experience and does not reflect the overall brand identity.

### Suggested Solution

To enhance the visual consistency and brand identity of SwiftPaste, I propose improving the styling of the main component. We should explore different ways to match the style guides and colors used in the rest of the extension.

Consider the following steps to achieve this:

1. Analyze the existing style guides and color schemes used in the Options and Extension interface.
2. Identify the key elements that contribute to the overall brand look and feel, such as typography, colors, spacing, and components.
3. Apply the identified style elements to the main SwiftPaste component, ensuring visual consistency throughout the extension.
4. Pay attention to details, including button styles, background colors, borders, and overall layout, to ensure a seamless and cohesive user experience.

By aligning the styling of the SwiftPaste component with the rest of the extension, we can create a more unified and visually appealing user interface.

**Expected Outcome**
- Improved visual consistency and brand identity across the SwiftPaste component, Options, and Extension interface.
- A more seamless and cohesive user experience.
- Strengthened brand recognition and association.

**Additional Notes**

Gather input and ensure the proposed styling changes align with the brand guidelines and visual identity.

Additionally, conduct thorough testing to ensure that the new styling does not negatively impact the usability or accessibility of the SwiftPaste component. Strive for a balance between visual aesthetics and user experience to create a delightful and on-brand interface.

Review the existing Options and Extension interface styles alongside the main SwiftPaste component, focusing on the stated typography, colors, spacing, buttons, backgrounds, borders, and layout. Define a concrete visual direction from that comparison, then verify that the updated component is consistent, usable, and accessible without negatively affecting the interface.

Written by the indexing model from the issue text.