refactor: rename app to aryx

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/renderer/components/SettingsPanel.tsx

@@ -293,7 +293,7 @@ function AppearanceSection({
       <div className="mb-1">
         <h3 className="text-[13px] font-semibold text-zinc-200">Appearance</h3>
         <p className="mt-0.5 text-[12px] text-zinc-500">
-          Choose how Eryx looks on your device
+          Choose how Aryx looks on your device
         </p>
       </div>
 
@@ -348,7 +348,7 @@ function ConnectionSection({
       <div className="mb-1">
         <h3 className="text-[13px] font-semibold text-zinc-200">GitHub Copilot</h3>
         <p className="mt-0.5 text-[12px] text-zinc-500">
-          Eryx uses your installed GitHub Copilot CLI for AI capabilities
+          Aryx uses your installed GitHub Copilot CLI for AI capabilities
         </p>
       </div>
       <div className="mt-4 rounded-xl border border-[var(--color-border)] bg-zinc-900/30 p-4">

src/renderer/components/Sidebar.tsx

@@ -524,9 +524,9 @@ export function Sidebar({
       {/* Header — extra top padding clears the title bar overlay zone */}
       <div className="drag-region flex items-center justify-between border-b border-[var(--color-border)] px-4 pb-3 pt-3">
         <div className="flex items-center gap-2.5">
-          <img alt="eryx" className="size-8 rounded-xl" src={appIconUrl} />
+          <img alt="aryx" className="size-8 rounded-xl" src={appIconUrl} />
           <div>
-            <span className="text-sm font-semibold text-zinc-100">eryx</span>
+            <span className="text-sm font-semibold text-zinc-100">aryx</span>
             <span className="ml-1.5 rounded bg-zinc-800 px-1 py-0.5 text-[9px] font-medium text-zinc-500">
               ALPHA
             </span>

src/renderer/components/WelcomePane.tsx

@@ -21,7 +21,7 @@ export function WelcomePane({
         </div>
 
         <div>
-          <h1 className="text-base font-semibold text-zinc-100">Welcome to eryx</h1>
+          <h1 className="text-base font-semibold text-zinc-100">Welcome to aryx</h1>
           <p className="mt-2 max-w-md text-[13px] leading-relaxed text-zinc-500">
             Start a scratchpad conversation for ad-hoc questions or connect a project to work with
             repo-aware Copilot agents.