leptos-knowledge-patch

# Leptos Knowledge Patch Use this patch before writing, migrating, or reviewing Leptos applications. Start with the breaking-change checklist, then open the topic reference that matches the code being changed. ## Reference index | Reference | Topics | | --- | --- | | [cargo-leptos](references/cargo-leptos.md) | Prebuilt installation, supported archives, checksums, stable hot reload | | [Migration and configuration](references/migration-and-configuration.md) | Imports, constructors, storage, options, crate versions, CSS, feature flags | | [Reactivity and stores](references/reactivity-and-stores.md) | Arc signals, guards, resources, automatic batching, conversions, stores | | [Routing, SSR, and integrations](references/routing-ssr-and-integrations.md) | Typed routes, fallbacks, transitions, islands routing, document shells, Axum | | [Server functions and lazy loading](references/server-functions-and-lazy-loading.md) | Custom errors, WebSockets, codecs, body limits, code splitting, lazy routes | | [Views, components, and browser APIs](references/views-components-and-browser.md) | Typed views, attribute spreading, binding, rendering traits, ShowLet, platform attributes | ## Breaking-change checklist ### Update imports and constructors - Import common APIs with `use leptos::prelude::*`. - Import router components from `leptos_router::components` and hooks from `leptos_router::hooks`. - Replace `create_signal(...)` with `signal(...)` and `create_rw_signal(...)` with `RwSi...