Remove query-string cache-busting from static assets

Drop ?v=N version pins from all JS imports and HTML <link>/<script> tags.
Cache invalidation is now handled solely by server-side cache-control headers.
Update docs and AGENTS.md accordingly.

docs/architecture.md

@@ -348,7 +348,7 @@ Each route is a `definePage()` component with reactive state, async data loading
 
 ### No Build Step
 
-All JavaScript is served as ES modules. The `?v=N` query string param version-pins asset imports for cache invalidation. Dev mode (`VACUUM_WALL_DEV`) disables aggressive static asset caching.
+All JavaScript is served as ES modules. Cache invalidation is handled via HTTP cache-control headers. Dev mode (`VACUUM_WALL_DEV`) disables aggressive static asset caching.
 
 ### WebSocket Broadcast
 

docs/hoover.md

@@ -55,7 +55,7 @@ The app starts from `webui/static/app.js`:
 
 ```javascript
 import { h, render, Link, hComp, ToastContainer, connect, apiFetch,
-         modelRegister, modelFetch, reactive } from '/static/hoover/index.js?v=8';
+          modelRegister, modelFetch, reactive } from '/static/hoover/index.js';
 
 // 1. Register subsystem models
 modelRegister('firewall', {
@@ -1151,9 +1151,10 @@ Render the toast notification container. Include in the main render root. See AP
 | `parseZones(data)` | Parse zone data from API responses into a flat string array |
 | `downloadBlob(blob, filename)` | Trigger a browser file download from a Blob |
 
-## Versioned Imports
+## Static Asset Caching
 
-Static assets in `app.js` are imported with querystring version pins (e.g., `?v=8`) to invalidate browser cache when the framework changes. Page imports also include version pins (e.g., `?v=9`). The server handles caching headers; the version query string ensures browser cache invalidation.
+The server handles caching headers for static assets. Browser cache invalidation is managed
+through server-side cache-control headers rather than query string version pins.
 
 Dev mode (`VACUUM_WALL_DEV` set) disables aggressive static asset caching.