Rename app from oAI to Confab

"oAI" reads as easily confused with OpenAI, both visually and in
casual conversation. Renamed to "Confab" throughout: Xcode
target/scheme/bundle ID (com.oai.Confab), Info.plist and Help Book
identity, all user-facing UI text, internal Log subsystem and color
identifiers, localization catalogs (6 languages, including a proper
reworded/retranslated Intel-deprecation notice), Help Book HTML
content, and docs (README/DEVELOPMENT/PRIVACY/SECURITY).

Deliberately cosmetic-only: the on-disk data folder
(~/Library/Application Support/oAI/), database/backup filenames,
Keychain service identifiers, and EncryptionService's key-derivation
inputs are all left untouched so existing conversations, settings,
and stored API keys survive the update with zero migration and no
re-entering credentials. Verified live: a real signed build
successfully decrypted a stored API key and loaded an existing
conversation database after the bundle ID change.

Also includes a small already-completed, previously uncommitted
model-release-date feature (ModelInfo/OpenRouterModels/
OpenRouterProvider/ModelInfoView) that happened to share several
files with this rename.

Gitignored on this branch and updated on disk but not part of this
commit: CLAUDE.md, RELEASE_NOTES.md, and the build*.sh scripts.

oAI/Services/EmailHandlerService.swift

@@ -1,17 +1,17 @@
 //
 //  EmailHandlerService.swift
-//  oAI
+//  Confab
 //
 //  AI-powered email auto-responder service
 //
 // SPDX-License-Identifier: PolyForm-Noncommercial-1.0.0
 // Copyright (C) 2026 Rune Olsen
 //
-// This file is part of oAI.
+// This file is part of Confab.
 //
-// oAI is licensed under the PolyForm Noncommercial License 1.0.0.
+// Confab is licensed under the PolyForm Noncommercial License 1.0.0.
 // You may use, study, modify, and share it for any noncommercial
-// purpose. Commercial use — including selling oAI or any part of
+// purpose. Commercial use — including selling Confab or any part of
 // it, standalone or bundled into another product or service —
 // requires a separate commercial license from the copyright holder.
 //
@@ -32,7 +32,7 @@ final class EmailHandlerService {
     private let emailService = EmailService.shared
     private let emailLog = EmailLogService.shared
     private let mcp = MCPService.shared
-    private let log = Logger(subsystem: "com.oai.oAI", category: "email-handler")
+    private let log = Logger(subsystem: Log.subsystem, category: "email-handler")
 
     // Rate limiting
     private var emailsProcessedThisHour: Int = 0
@@ -403,7 +403,7 @@ final class EmailHandlerService {
                 </div>
             </div>
             <div class="footer">
-                <p>🤖 This response was generated by AI using oAI Email Handler</p>
+                <p>🤖 This response was generated by AI using Confab Email Handler</p>
             </div>
         </body>
         </html>