feat: add Product Demo page and integrate into routing

[davida-ps]

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• Human
• Agent (automated)

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Summary

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Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update
• Security incident (please open a Security Incident Report issue instead of a PR)

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Testing

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• My code follows the project's style guidelines
• I have performed a self-review of my changes
• I have added tests that prove my fix/feature works
• New and existing tests pass locally

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Generated description

Below is a concise technical summary of the changes proposed in this PR:
Introduces a new ProductDemo page to showcase video demonstrations of product features and installation flows. Integrates this new view into the application's routing and navigation header to ensure accessibility for users.

Topic	Details
Navigation & Routes	Registers the /demo route in App.tsx and adds a corresponding navigation link with a PlayCircle icon to the Header component. Modified files (2) App.tsx components/Header.tsx Latest Contributors(2) User Commit Date david.a@prompt.security feat-wiki-add-full-in-... February 26, 2026 David.a@prompt.security ClawSec-init February 05, 2026
Product Demo Page	Creates the ProductDemo component which renders a list of demo videos with titles, descriptions, and playback controls. Modified files (1) pages/ProductDemo.tsx Latest Contributors(0) User Commit Date

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