fix(islands): rebuild on .tsx edits and support islands inside components

Three bugs found by driving the dev server rather than reading code:

1. An island used inside a .wrn component still emitted a component mount
   — only the page and nested-page render paths were covered.

2. Editing an island .tsx never rebuilt in dev. The bundle cache was keyed
   on source path alone, and page modules are cached after the first
   request so no compile runs to notice the change. The cache key now
   includes mtime, and the file watcher rebuilds islands whose .tsx
   changed.

3. A .wrn cache hit skipped island building entirely, so after a restart
   with a warm cache no island bundle was ever produced. Island inputs are
   now persisted beside the other artifacts and rebuilt on a cache hit.

The islands manifest is deliberately excluded from the artifact
completeness check: only the async compile path writes it, so requiring it
made the sync path miss the cache on every call.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

editors/vscode/src/compiler.cjs

@@ -1,6 +1,6 @@
 "use strict";
 // Generated by scripts/build-editor-compiler.mjs. Do not edit directly.
-// WRN editor compiler source hash: 631914b0f75e27a95908eb3252604e0948abf27b50533ab01f0dd12b532a1020
+// WRN editor compiler source hash: fd183ab8c54df72c779d099d7625ce0068e49bea458052335c77cbf31ccf9179
 // WRN editor compiler generator hash: a54ca847c758bc98d8e353ad6d70088df31de1820f6cf9d1c3462505f563e6b8
 // Generated with TypeScript: 6.0.3
 const __nodeRequire = require;
@@ -1385,6 +1385,10 @@ function renderPageComponentInvocation(node, ssrBindings, csrBindings, apiBindin
     return `<div data-component="${attrEscape(node.tag)}"` + `${attrs}>${inner}</div>`;
 }
 function renderNestedComponentInvocation(node, ctx) {
+    // Islands work inside .wrn components too, not just pages.
+    const island = islandMarkerFor(node);
+    if (island)
+        return island;
     let bindIndex = 0;
     const attrs = node.attrs
         .filter((attr) => attr.name !== "data-component")

editors/vscode/src/extension.bundle.cjs

@@ -1,4 +1,4 @@
-// WRN editor extension source hash: 67bc974ee8e647ebce3dfc0ceaff2a1be56384fc16ed0334b89ab32d6bd590a8
+// WRN editor extension source hash: c9938fa5f643ca435ead2c8dd5b545c6906c37c0024cf3ea788666236c28ddb6
 // WRN editor extension generator hash: 456d1d614e44e5fb1f19b784176c09cf2ade9b64ef73a17934c2698150b62728
 "use strict";
 var __commonJS = (cb, mod) => () => (mod || cb((mod = { exports: {} }).exports, mod), mod.exports);