fix(tui): finish neuron branding across user-visible surfaces

packages/tui/src/component/error-component.tsx

@@ -192,7 +192,7 @@ export function ErrorComponent(props: { error: Error; reset: () => void; mode?:
                 ? "Report copied — paste it into a new GitHub issue."
                 : "Copy the report and open a GitHub issue to help us fix this."}
             </text>
-            <text fg={colors.muted}>opencode {InstallationVersion}</text>
+            <text fg={colors.muted}>neuron {InstallationVersion}</text>
           </box>
         </Show>
       </box>

packages/tui/src/feature-plugins/home/tips-view.tsx

@@ -167,7 +167,7 @@ const TIPS: Tip[] = [
   (shortcuts) => press(shortcuts.agentCycle(), "to cycle between Build and Plan agents"),
   "Use {highlight}/undo{/highlight} to revert the last message and file changes",
   "Use {highlight}/redo{/highlight} to restore previously undone messages and file changes",
-  "Run {highlight}/share{/highlight} to create a public opencode.ai link",
+  "Run {highlight}/share{/highlight} to create a public session link",
   "Drag and drop images or PDFs into the terminal as context",
   (shortcuts) => press(shortcuts.inputPaste(), "to paste images from your clipboard into the prompt"),
   (shortcuts) => `Use ${commandText("/editor", shortcuts.editorOpen())} to compose messages in your external editor`,

packages/tui/src/routes/session/sidebar.tsx

@@ -89,9 +89,9 @@ export function Sidebar(props: { sessionID: string; overlay?: boolean }) {
         <box flexShrink={0} gap={1} paddingTop={1}>
           <pluginRuntime.Slot name="sidebar_footer" mode="single_winner" session_id={props.sessionID}>
             <text fg={theme.textMuted}>
-              <span style={{ fg: theme.success }}>•</span> <b>Open</b>
+              <span style={{ fg: theme.success }}>•</span> <b>Neu</b>
               <span style={{ fg: theme.text }}>
-                <b>Code</b>
+                <b>ron</b>
               </span>{" "}
               <span>{InstallationVersion}</span>
             </text>