Add per-app cascade configuration and auto app ID detection#1

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Copilot wants to merge 9 commits intomainfrom

copilot/refactor-onload-function

Commits on Feb 18, 2026

Initial plan
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Refactor hardcoded.js with app registry and data-driven startup

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zigzag1001
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Fix static windows duplication - now fully controlled by config

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zigzag1001
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Add comprehensive refactoring summary documentation

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zigzag1001
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Move app registry to script.js, enable z&w together, per-profile cascade

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zigzag1001
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Update documentation to reflect new architecture

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zigzag1001
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Implement app registry with definitions and active instances

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zigzag1001
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Add per-app cascade settings and auto app ID detection

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zigzag1001
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Address code review feedback - add helper function and fix cascade storage

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zigzag1001
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