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>

Jarvis/Info.plist

@@ -4,13 +4,13 @@
 <dict>
 	<key>BGTaskSchedulerPermittedIdentifiers</key>
 	<array>
-		<string>com.kisani.jarvis.briefing.refresh</string>
-		<string>com.kisani.jarvis.feed.refresh</string>
+		<string>com.kisani.jervis.briefing.refresh</string>
+		<string>com.kisani.jervis.feed.refresh</string>
 	</array>
 	<key>CFBundleDevelopmentRegion</key>
 	<string>$(DEVELOPMENT_LANGUAGE)</string>
 	<key>CFBundleDisplayName</key>
-	<string>Jarvis</string>
+	<string>Jervis</string>
 	<key>CFBundleExecutable</key>
 	<string>$(EXECUTABLE_NAME)</string>
 	<key>CFBundleIdentifier</key>
@@ -39,7 +39,7 @@
 		<true/>
 	</dict>
 	<key>NSLocalNetworkUsageDescription</key>
-	<string>Jarvis connects to your self-hosted news platform on the local network.</string>
+	<string>Jervis connects to your self-hosted news platform on the local network.</string>
 	<key>UIBackgroundModes</key>
 	<array>
 		<string>fetch</string>