U4: Add consent-cost choices and consequences

[breadback00-dev]

Parent: #16

Purpose

Turn investigation into an ethical action, not only a reading task.

Scope

• Add one or two consent moments before reveal, such as respecting Elian's boundary versus probing for proof.
• Reflect choices in Archive Pressure, cast reactions, action trace, and later custody/debrief copy.
• Keep invasive and protective choices narratively useful without making either a simple right/wrong branch.
• Allow entity withdrawal/redaction only in supporting UI/copy; do not hide case-critical evidence.

Target files

• Case Box 001 - The Creator Who Left But Kept Posting/index.html
• Case Box 001 - The Creator Who Left But Kept Posting/src/data/case-001.js
• Case Box 001 - The Creator Who Left But Kept Posting/src/scripts/horror-engine.js
• Case Box 001 - The Creator Who Left But Kept Posting/src/scripts/case-engine.js
• Case Box 001 - The Creator Who Left But Kept Posting/src/scripts/app.js
• Case Box 001 - The Creator Who Left But Kept Posting/src/styles/components.css
• Case Box 001 - The Creator Who Left But Kept Posting/tests/horror-engine.test.js

Acceptance checks

• Invasive choice increases pressure and records in trace.
• Protective choice records restraint and changes later debrief language.
• Consequences appear in cast/dossier or reveal/custody framing.
• Reconstruction and custody remain reachable after any consent choice.
• Invasive choices never reveal real-world or extra-case personal information.