Removes a premature call to `initializeLoginModalController` in `ApplicationBootstrap` which was attempting to initialize the login modal before the DOM was fully hydrated, causing a "modal container not found" warning during startup. The modal is already correctly initialized later in `js/index.js` after markup loading completes.
- Add Storage tab to Profile Modal HTML with provider selector (R2 default) and connection form
- Wire ProfileModalController to handle tab switching, unlocking storage, and saving/testing connections
- Inject storageService into ProfileModalController via ApplicationBootstrap
- Repurpose Endpoint input as Account ID for R2 configurations
- Implement form validation and lock state handling
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