feat(seo): lead with MCP in Title/H1 for google-search-console, google-analytics, semrush

[JayZeeDesign]

What this does

Fixes the MCP CTR gap for three own-account /tools/{provider} pages where GSC shows strong {provider} mcp impressions with near-zero clicks:

Query	Impressions	Clicks	Page
google search console mcp	106	0	/tools/google-search-console
search console mcp	36	0	(same page)
google analytics mcp	24	0	/tools/google-analytics
semrush mcp	12	0	/tools/semrush

These pages' titles previously said only "connect your own account" and never mentioned MCP.

Changes:

• Add _MCP_INTENT_PROVIDERS allowlist for the three slugs
• Title: {Provider} MCP: connect your own account | treg.to
• H1: matches Title lead
• Meta description: names MCP + connect-own-account + treg.to as one MCP for the catalog
• Lede (first-fold copy): mentions one MCP for the whole catalog
• Update docs/context/interface/seo.md with the new own-account MCP title contract
• Add test_mcp_intent_providers_lead_with_mcp pinning all three Title/H1/description

Out of scope: Does not touch #481's metered/mixed title work, hubs, use-case pages, blog, pricing, or homepage.

How it was tested

uv run --frozen python -m pytest tests/test_provider_pages.py -v  # 12 passed
uv run --frozen python -m pytest tests/test_seo.py -v              # 69 passed

New test verifies all three pages have:

• Title: {Provider} MCP: connect your own account | treg.to
• H1: {Provider} MCP: connect your own account
• Meta description contains "MCP" and "treg.to"

Checklist

• uv run --with pytest-xdist pytest -n auto -q passes locally
• Added or updated tests for the change (if it affects behavior)
• Updated the relevant docs/context/ fragment (if a subsystem changed)
• No secrets in the diff (keys, tokens, .env values)

  

[cursor]

Folded into #551.