ENG-8666: ENG-8667: Update intro docs

[carlosabadia]

No description provided.

[linear]

ENG-8666 Introduction Page Update

ENG-8667 Installation Docs Updates

[greptile-apps]

Greptile Summary

Updated getting started documentation to use the modern uv package manager instead of traditional venv/pip workflow, and added @rx.event decorators to event handler examples in the introduction.

Major changes:

• Replaced venv + pip installation instructions with uv init + uv add reflex workflow across macOS/Linux and Windows
• Added UV_URL constant to pcweb/constants.py for documentation links
• Updated all command examples to use uv run reflex instead of direct reflex commands
• Added @rx.event decorators to event handlers in introduction examples for consistency with current best practices
• Added type annotations (str) to IntroTabsState vars
• Enhanced "Next Steps" section with references to Reflex Build, hosting docs, and community resources
• Minor CSS change removing !important from background property in code blocks

Documentation improvements:

• More streamlined onboarding experience with modern tooling
• Better alignment with current Reflex best practices (@rx.event decorators)
• Improved discoverability of Reflex features and community resources

Confidence Score: 4/5

• This PR is safe to merge with low risk - primarily documentation updates with modern tooling
• The changes are primarily documentation updates that modernize the installation process. The code changes are minimal (adding decorators and type annotations to examples, adding a constant). One minor concern is the installation.md file includes curl | sh pattern for installing uv, but this is the official installation method from uv's documentation
• Verify that the uv installation instructions work correctly across all platforms and that the UV_URL constant is properly rendered in the documentation

Important Files Changed

Filename	Overview
assets/tailwind-theme.css	Removed !important flag from background property - minor CSS specificity change
pcweb/constants.py	Added UV_URL constant for uv package manager documentation link
docs/getting_started/installation.md	Updated installation guide from venv/pip to uv-based workflow - major documentation change with improved modern tooling
docs/getting_started/introduction.md	Added @rx.event decorators to event handlers, type annotations to State vars, and enhanced next steps section with additional resources

Sequence Diagram

sequenceDiagram
    participant User
    participant Docs as Documentation
    participant Constants as constants.py
    participant UV as UV Package Manager
    participant Reflex as Reflex Framework

    User->>Docs: Read installation.md
    Docs->>Constants: Reference UV_URL constant
    Constants-->>Docs: Return UV documentation link
    Docs->>User: Display uv installation instructions
    User->>UV: Install uv (curl/powershell)
    UV-->>User: Package manager installed
    User->>UV: Run "uv init"
    UV-->>User: Project initialized
    User->>UV: Run "uv add reflex"
    UV->>Reflex: Install Reflex package
    Reflex-->>UV: Package installed
    User->>UV: Run "uv run reflex init"
    UV->>Reflex: Execute reflex init
    Reflex-->>User: Template selection prompt
    User->>Reflex: Select template option
    Reflex-->>User: Reflex project ready
    User->>Docs: Read introduction.md
    Docs->>User: Show counter example with @rx.event decorators

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