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/EncryptionService.swift

@@ -1,6 +1,6 @@
 //
 //  EncryptionService.swift
-//  oAI
+//  Confab
 //
 //  Secure encryption for sensitive data (API keys)
 //  Uses CryptoKit with machine-specific key derivation
@@ -8,11 +8,11 @@
 // 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.
 //
@@ -72,7 +72,10 @@ class EncryptionService {
     /// Derive encryption key from machine-specific data
     private static func deriveEncryptionKey() -> SymmetricKey {
         let machineUUID = getMachineUUID()
-        let bundleID = Bundle.main.bundleIdentifier ?? "com.oai.oAI"
+        // Pinned, not read from Bundle.main.bundleIdentifier: the app's bundle ID changed
+        // (oAI -> Confab rename) but this key material must not, or every already-encrypted
+        // setting (provider API keys, sync/email credentials) becomes undecryptable.
+        let bundleID = "com.oai.oAI"
         let salt = "oAI-secure-storage-v1"
         let keyMaterial = "\(machineUUID)-\(bundleID)-\(salt)"
         let hash = SHA256.hash(data: Data(keyMaterial.utf8))