rebrand: Jarvis -> Jervis for App Store submission

"JARVIS" is Marvel's trademark for the Iron Man/Avengers AI — real
legal risk for a commercial App Store listing, and the name is already
contested there ("Jarvis: Powered by Marvel", "Jarvis - AI Chatbot").
Jervis reads identically but doesn't collide.

Scoped to user-facing surfaces only:
- CFBundleDisplayName, PRODUCT_BUNDLE_IDENTIFIER (com.kisani.jervis)
- BGTaskSchedulerPermittedIdentifiers + matching Swift constants
- NSLocalNetworkUsageDescription permission prompt copy
- JarvisWordmark rendered text ("j" + "ervis")
- Notification permission prompt copy

Internal Xcode target/executable name, Swift type names (JarvisWordmark,
JarvisApp), file/folder names, and repo name are unchanged — renaming
those is a separate, larger refactor with no user-facing benefit.

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

project.yml

@@ -15,12 +15,12 @@ targets:
     info:
       path: Jarvis/Info.plist
       properties:
-        CFBundleDisplayName: Jarvis
+        CFBundleDisplayName: Jervis
         UILaunchScreen:
           UIColorName: ""
         UISupportedInterfaceOrientations:
           - UIInterfaceOrientationPortrait
-        NSLocalNetworkUsageDescription: "Jarvis connects to your self-hosted news platform on the local network."
+        NSLocalNetworkUsageDescription: "Jervis connects to your self-hosted news platform on the local network."
         NSAppTransportSecurity:
           NSAllowsArbitraryLoads: true
           NSAllowsLocalNetworking: true
@@ -32,11 +32,11 @@ targets:
           - fetch
           - processing
         BGTaskSchedulerPermittedIdentifiers:
-          - com.kisani.jarvis.briefing.refresh
-          - com.kisani.jarvis.feed.refresh
+          - com.kisani.jervis.briefing.refresh
+          - com.kisani.jervis.feed.refresh
     settings:
       base:
-        PRODUCT_BUNDLE_IDENTIFIER: com.kisani.jarvis
+        PRODUCT_BUNDLE_IDENTIFIER: com.kisani.jervis
         MARKETING_VERSION: "1.0"
         CURRENT_PROJECT_VERSION: "1"
         TARGETED_DEVICE_FAMILY: "1"