Add config-gated prompt templating

[MariaHov]

Summary

• Adds config-gated prompt templating where {{placeholders}} create matching per-case fields
• Each case can have different variable values, with a hideable full-prompt preview of the exact text sent to the model
• Leaves Course 1 behavior unchanged unless features.promptTemplating is enabled

Test plan

• With templating disabled, Course 1 UI is unchanged
• Enable dynamicFields and confirm placeholders create case fields
• Edit template text and confirm shared wording stays fixed while case values vary
• Confirm full prompt preview opens by default and can be hidden
• Confirm report.md includes variables and filled-in prompts
• npm test

Made with Cursor

[coderabbitai]

Important

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⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Advanced

Run ID: 1c52f89e-85f1-47ab-8dc6-71b1e5ee95f8

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