OPS-1430: Add what are you interested in option in demo form

[carlosabadia]

No description provided.

[linear]

OPS-1430 Pricing page form - dropdown for what they want to "buy"

[codspeed-hq]

Merging this PR will not alter performance

✅ 24 untouched benchmarks
⏩ 2 skipped benchmarks¹

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_{Comparing carlos/update-demo-form-options (d0c7bdd) with main (d9b4a76)}

Footnotes

1. 2 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[greptile-apps]

Greptile Summary

This PR adds a new "What are you interested in?" select field to the demo form (with options: AI builder, MCP, On-Prem, App Management) and consolidates it alongside the existing "How technical are you?" field into the responsive 2-column grid, creating a clean 2×2 layout on medium+ screens. The interested_in key is correctly registered in PostHog's _COMMON_KEYS so it is captured in the demo_request event.

• demo_form.py: New required interested_in select field added; technical_level field moved into the md:grid-cols-2 grid (4 fields now, 2×2 on desktop).
• posthog.py: "interested_in" added to _COMMON_KEYS, which is also used by the intro form tracker — this is harmless since the key is absent from intro form submissions and is simply filtered out.

Confidence Score: 4/5

Safe to merge — the changes are additive and self-contained, touching only the form layout and PostHog key allowlist.

The new field is wired up correctly end-to-end: it appears in the form, it is required, and its key is present in the PostHog allowlist. The only observation is a minor style inconsistency where one select_field call still passes required as a positional True rather than the keyword required=True used by every other call in the same block.

No files require special attention; the style inconsistency in demo_form.py is cosmetic only.

Important Files Changed

Filename	Overview
packages/reflex-components-internal/src/reflex_components_internal/blocks/demo_form.py	Adds "What are you interested in?" select field and moves "How technical are you?" into the 2-column responsive grid, creating a 2×2 layout on medium+ screens.
packages/reflex-components-internal/src/reflex_components_internal/blocks/telemetry/posthog.py	Adds "interested_in" to _COMMON_KEYS so the new field is included in PostHog tracking for demo form submissions.

Sequence Diagram

sequenceDiagram
    participant User
    participant DemoForm
    participant DemoFormStateUI
    participant PostHog

    User->>DemoForm: Fill fields (name, email, company, interested_in, technical_level, …)
    User->>DemoForm: Submit
    DemoForm->>DemoFormStateUI: track_demo_form_posthog(form_data)
    DemoFormStateUI->>PostHog: track_demo_form_posthog_submission(form_data)
    Note over PostHog: Filter keys via _COMMON_KEYS<br/>(now includes "interested_in")
    PostHog-->>User: posthog.identify + posthog.capture("demo_request", props)
    DemoForm->>DemoForm: Close dialog (demo_form_open_cs = false)

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