refactor(app): consolidate shared state and utilities

Author: awesomestvi

AGENTS.md

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+## Commit Rules
+
+- All commit messages must follow Conventional Commits.
+- Format: `type(scope): summary`
+- Valid types include: `feat`, `fix`, `refactor`, `docs`, `test`, `chore`, `build`, `ci`, `perf`, and `style`.
+- Before creating a commit, verify the message matches Conventional Commits.
+- Do not use generic or free-form commit messages.
+- If a commit has already been created with a non-conventional message, amend it before finishing the task.