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/ViewModels/ChatViewModel.swift

@@ -1,17 +1,17 @@
 //
 //  ChatViewModel.swift
-//  oAI
+//  Confab
 //
 //  Main chat view model
 //
 // 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.
 //
@@ -1563,7 +1563,7 @@ Don't narrate future actions ("Let me...") - just use the tools.
                             didContinueAfterImages = true
                             let timestamp = Int(Date().timeIntervalSince1970)
                             let tempPaths: [String] = finalImages.enumerated().compactMap { i, imgData in
-                                let path = "/tmp/oai_generated_\(timestamp)_\(i).png"
+                                let path = "/tmp/confab_generated_\(timestamp)_\(i).png"
                                 let ok = FileManager.default.createFile(atPath: path, contents: imgData)
                                 Log.ui.debug("Saved generated image to temp: \(path) ok=\(ok)")
                                 return ok ? path : nil
@@ -2138,7 +2138,7 @@ Don't narrate future actions ("Let me...") - just use the tools.
         let alert = NSAlert()
         alert.alertStyle = .informational
         alert.messageText = "Restore unsaved conversation?"
-        alert.informativeText = "oAI didn't close properly last time. Would you like to restore the conversation you were working on?"
+        alert.informativeText = "Confab didn't close properly last time. Would you like to restore the conversation you were working on?"
         alert.addButton(withTitle: "Restore")
         alert.addButton(withTitle: "Discard")