feat(permissions): effective inspector polish and cross-links (v0.8.746)

Phase 779 adds copy effective-permissions deep links with optional memberId,
live breakdown refresh while the inspector is open, and a cross-link to
channel permissions for the focused role. Closes deferred P778-42.

Co-authored-by: Cursor <[email protected]>

headless.js

@@ -5335,6 +5335,18 @@ class HeadlessSession {
     if (nav.effectivePermFocusRoleId !== role.id) {
       throw new Error('nav effectivePermFocusRoleId mismatch')
     }
+    const ownerId = this.platform.identity.user?.id
+    if (ownerId) {
+      const urlMem = `${url}&memberId=${encodeURIComponent(ownerId)}`
+      const parsedMem = parsePearcordDeepLink(urlMem)
+      if (parsedMem?.editEffectivePermissions?.memberId !== ownerId) {
+        throw new Error('deep link parse missing memberId')
+      }
+      const navMem = await this.platform.navigateDeepLink(urlMem)
+      if (navMem.effectivePermFocusMemberId !== ownerId) {
+        throw new Error('nav effectivePermFocusMemberId mismatch')
+      }
+    }
     return { guildId, channelId: text.id, roleId: role.id }
   }