[RFT-SIRM]

What this fixes

The Core Development portfolio was injected immediately before </body> in the interactive Research Explorer. Since the Explorer already had a complete footer, the portfolio appeared as a second page appended underneath it.

Changes

• Create a dedicated MkDocs page at /core-development/.
• Add it to the Core Development navigation, documentation home, and README.
• Remove the HTML injector and its source fragment.
• Keep /interactive/ as the standalone Research Explorer and add CI checks that reject portfolio injection there.
• Preserve explicit evidence boundaries: QPU Stage 11B is a three-mode closed-system model (not measured hardware fidelity), local-retune raw artifacts are not yet archived; financial dispute adjudication remains open; higher-moment finite bridges and Phi-Genesis open questions remain scoped accurately.

Verification

• Checked the published gh-pages HTML: the Research Explorer footer was followed by the injected portfolio section, confirming the cause.
• Checked that all linked project repositories exist and inspected their current status documents.
• Checked the prepared README, MkDocs navigation, page content, and workflow diffs.
• No build or deployment result is claimed yet; CI must validate the new separate-page build before merge.