feat: add profileScope field to vault docs and API keys

Adds a `profileScope` property (null = all profiles, number[] =
specific profile indices) to both vault-store and api-key-store
data models. Existing items default to null. The field is preserved
through save/update cycles and ready for UI filtering when
per-profile scoping is implemented.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: vveerrgg

distros/chrome/api-keys/api-keys.build.js

@@ -4,13 +4,15 @@
  * Storage schema in browser.storage.local:
  *   apiKeyVault: {
  *     keys: {
- *       "<uuid>": { id, label, secret, createdAt, updatedAt }
+ *       "<uuid>": { id, label, secret, createdAt, updatedAt, profileScope }
  *     },
  *     syncEnabled: true,
  *     eventId: null,
  *     relayCreatedAt: null,
  *     syncStatus: "synced"    // synced | local-only | conflict
  *   }
+ *
+ * profileScope: null (all profiles) | number[] (specific profile indices)
  */
 
 import { api } from './browser-polyfill';
@@ -70,6 +72,7 @@ export async function saveApiKey(id, label, secret) {
         secret,
         createdAt: existing?.createdAt || now,
         updatedAt: now,
+        profileScope: existing?.profileScope ?? null,
     };
     await setStore(store);
     return store.keys[id];

distros/chrome/vault/vault.build.js

@@ -4,11 +4,13 @@
  * Storage schema in browser.storage.local:
  *   vaultDocs: {
  *     "path/to/file.md": {
- *       path, content, updatedAt, syncStatus, eventId, relayCreatedAt
+ *       path, content, updatedAt, syncStatus, eventId, relayCreatedAt,
+ *       profileScope
  *     }
  *   }
  *
  * syncStatus: "synced" | "local-only" | "conflict"
+ * profileScope: null (all profiles) | number[] (specific profile indices)
  */
 
 import { api } from './browser-polyfill';
@@ -50,13 +52,15 @@ export async function getDocument(path) {
  */
 export async function saveDocumentLocal(path, content, syncStatus, eventId = null, relayCreatedAt = null) {
     const docs = await getDocs();
+    const existing = docs[path];
     docs[path] = {
         path,
         content,
         updatedAt: Math.floor(Date.now() / 1000),
         syncStatus,
         eventId,
         relayCreatedAt,
+        profileScope: existing?.profileScope ?? null,
     };
     await setDocs(docs);
     return docs[path];