Fix responsive layout of share page

[mrubens]

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### Related GitHub Issue

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### Description

This PR addresses the responsive layout issues on the share page by improving the adaptability of both the share options popover and the "Connect to Cloud" modal.

Key changes include:

*   **Share Popover (`PopoverContent`)**:
    *   Adjusted width to be responsive (`w-64 sm:w-72 md:w-80`).
    *   Improved content layout with `flex-shrink-0` for icons, `items-start` for better alignment, `min-w-0 flex-1` for text containers, and `break-words` for proper text wrapping.
    *   Refined spacing and typography for better readability across screen sizes.
*   **Connect to Cloud Modal (`DialogContent`)**:
    *   Implemented responsive sizing (`max-w-sm sm:max-w-md`, `w-[calc(100vw-2rem)]`, `mx-4`) to prevent overflow and adapt to various viewports.
    *   Updated typography with responsive text sizes (`text-sm sm:text-base`, `text-lg sm:text-xl`) and improved line heights.
    *   Standardized spacing using `gap-3`, `space-y-3`, and `space-y-4` for consistent vertical rhythm.
    *   Adjusted button heights for better touch targets on mobile (`h-10 sm:h-11`).

These changes ensure the share functionality maintains a consistent and user-friendly experience across all device sizes.

### Test Procedure

To test these changes:

1.  Navigate to a page with the "Share" button (e.g., a chat task page).
2.  Click the "Share" button to open the popover.
3.  If not connected to the cloud, click the "Connect to Cloud" option to open the modal.
4.  **Verify Responsiveness**:
    *   Resize your browser window from very narrow (mobile) to wide (desktop) and observe both the popover and the modal.
    *   Ensure content (text, icons, buttons) wraps correctly, remains aligned, and does not overflow its container.
    *   Check that spacing and text sizes adjust appropriately for different screen widths.
    *   Confirm that the "Connect to Cloud" modal does not exceed the viewport width on small screens.

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- [ ] **Issue Linked**: This PR is linked to an approved GitHub Issue (see "Related GitHub Issue" above).
- [ ] **Scope**: My changes are focused on the linked issue (one major feature/fix per PR).
- [ ] **Self-Review**: I have performed a thorough self-review of my code.
- [ ] **Testing**: New and/or updated tests have been added to cover my changes (if applicable).
- [ ] **Documentation Impact**: I have considered if my changes require documentation updates (see "Documentation Updates" section below).
- [ ] **Contribution Guidelines**: I have read and agree to the [Contributor Guidelines](/CONTRIBUTING.md).

### Screenshots / Videos

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Please provide screenshots/videos demonstrating the responsive behavior of the share popover and connect modal across different screen sizes.

### Documentation Updates

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- [x] No documentation updates are required.

### Additional Notes

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[Slack Thread](https://roo-code.slack.com/archives/D0923B8VDMH/p1752159126228739?thread_ts=1752159126.228739&cid=D0923B8VDMH)
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----

> [!IMPORTANT]
> Improves responsive layout of share popover and connect modal in `ShareButton.tsx` for better adaptability across screen sizes.
> 
>   - **Responsive Design**:
>     - `PopoverContent` width adjusted to `w-64 sm:w-72 md:w-80` for responsiveness.
>     - `DialogContent` in connect modal set to `max-w-sm sm:max-w-md`, `w-[calc(100vw-2rem)]`, `mx-4` to prevent overflow.
>   - **Layout Improvements**:
>     - Added `flex-shrink-0`, `items-start`, `min-w-0 flex-1`, and `break-words` to improve layout and text wrapping in `ShareButton`.
>     - Standardized spacing with `gap-3`, `space-y-3`, and `space-y-4` in `DialogContent`.
>     - Adjusted button heights to `h-10 sm:h-11` for better mobile touch targets.
> 
> <sup>This description was created by </sup>[<img alt="Ellipsis" src="https://img.shields.io/badge/Ellipsis-blue?color=175173">](https://www.ellipsis.dev?ref=RooCodeInc%2FRoo-Code&utm_source=github&utm_medium=referral)<sup> for ca0110ae9236c7701c1cba03041e73abc558a74c. You can [customize](https://app.ellipsis.dev/RooCodeInc/settings/summaries) this summary. It will automatically update as commits are pushed.</sup>

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[delve-auditor]

✅ No security or compliance issues detected. Reviewed everything up to ca0110a.

Security Overview

• 🔎 Scanned files: 1 changed file(s)

Detected Code Changes

Change Type	Relevant files
Enhancement	► ShareButton.tsx     Improve UI layout and responsiveness     Update spacing and text styles     Enhance mobile and desktop viewport adaptability

Reply to this PR with @delve-auditor followed by a description of what change you want and we'll auto-submit a change to this PR to implement it.