LAM-1529: Rewrite /overview page

[laminar-coding-agent]

Summary

• Lead with a bold thesis sentence naming tracing, transcript view, and Signals, with inline links to each.
• Swap the old agent-trace placeholder for the transcript-view multi-agent screenshot so the hero image matches the current product UX.
• Tracing card now emphasizes agentic-framework coverage (Claude Agent SDK, OpenAI Agents SDK, Mastra, Pydantic AI, LangGraph, AI SDK, Browser Use, Stagehand) plus OTel-native provider auto-instrumentation.
• Split Raw SQL access into its own card alongside Signals and Transcript view, pointing at the SQL editor and the MCP server.
• Dropped the generic "Datasets & Labeling" and old "Platform" cards to keep the grid focused on the primitives the overview should sell.

Test plan

• npx mintlify broken-links passes (with CLAUDE.md temporarily renamed per repo convention).
• Page contains no em dashes and no banned marketing words.
• CardGroup stays cols={2} with an even count so the grid renders square.

🤖 Generated with Claude Code

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Note

Low Risk
Low risk: documentation-only changes that update positioning, links, and imagery without affecting runtime code.

Overview
Rewrites overview.mdx to lead with a stronger product thesis (OTel-native, tracing + transcript view + signals) and adds a new hero Frame screenshot for the transcript UX.

Updates the card grid to emphasize agentic-framework tracing support and provider auto-instrumentation, introduces dedicated cards for Transcript view and Raw SQL access (including MCP server link), and refreshes copy for Signals/Evaluations/Playground while removing the older generic cards.

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