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/Views/Main/ChatView.swift

@@ -1,17 +1,17 @@
 //
 //  ChatView.swift
-//  oAI
+//  Confab
 //
 //  Main chat interface
 //
 // 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.
 //
@@ -64,7 +64,7 @@ struct ChatView: View {
                     }
                     .padding()
                 }
-                .background(Color.oaiBackground)
+                .background(Color.confabBackground)
                 .onChange(of: viewModel.messages.count) {
                     withAnimation {
                         proxy.scrollTo("bottom", anchor: .bottom)
@@ -101,7 +101,7 @@ struct ChatView: View {
                 mcpEnabled: viewModel.mcpEnabled
             )
         }
-        .background(Color.oaiBackground)
+        .background(Color.confabBackground)
         .sheet(isPresented: $viewModel.showShortcuts) {
             ShortcutsView()
         }
@@ -142,12 +142,12 @@ struct ProcessingIndicator: View {
         HStack(spacing: 8) {
             Text(thinkingText)
                 .font(.system(size: 14, weight: .medium))
-                .foregroundColor(.oaiSecondary)
+                .foregroundColor(.confabSecondary)
 
             HStack(spacing: 4) {
                 ForEach(0..<3) { index in
                     Circle()
-                        .fill(Color.oaiSecondary)
+                        .fill(Color.confabSecondary)
                         .frame(width: 6, height: 6)
                         .scaleEffect(animating ? 1.0 : 0.5)
                         .animation(
@@ -161,7 +161,7 @@ struct ProcessingIndicator: View {
         }
         .padding(.horizontal, 16)
         .padding(.vertical, 12)
-        .background(Color.oaiSecondary.opacity(0.05))
+        .background(Color.confabSecondary.opacity(0.05))
         .cornerRadius(8)
         .onAppear {
             animating = true