feat(38-03): insert TelegramStep as step 5 in NexusOnboardingWizard

- Import TelegramStep component
- Insert Telegram step at position 5 (between Voice and Root Directory)
- Shift Root Directory from step 5 → step 6
- Shift Summary from step 6 → step 7
- Update step indicator from 'of 5' to 'of 6'
- Update summary indicator from step===6 to step===7
- Update all setStep() navigation callbacks accordingly
- Update error message referencing step 6 for root directory

ui/src/components/NexusOnboardingWizard.tsx

@@ -23,6 +23,7 @@ import { HardwareSummaryStep } from "./onboarding/HardwareSummaryStep";
 import { ProviderSelectionStep } from "./onboarding/ProviderSelectionStep";
 import { OnboardingSummaryStep } from "./onboarding/OnboardingSummaryStep";
 import { VoiceStep } from "./onboarding/VoiceStep";
+import { TelegramStep } from "./onboarding/TelegramStep";
 import { useHardwareInfo } from "../hooks/useHardwareInfo";
 import { updateNexusSettings, type NexusMode } from "../api/hardware";
 import { useChatPanel } from "../context/ChatPanelContext";
@@ -38,7 +39,7 @@ function deriveProviderLabel(
   return "None selected";
 }
 
-// [nexus] 6-step onboarding wizard: hardware detection → mode selection → provider selection → voice → root directory → summary
+// [nexus] 7-step onboarding wizard: hardware detection → mode selection → provider selection → voice → telegram → root directory → summary
 export function OnboardingWizard() {
   const { onboardingOpen, onboardingOptions, closeOnboarding } = useDialog();
   const { companies, setSelectedCompanyId, loading: companiesLoading } = useCompany();
@@ -66,7 +67,7 @@ export function OnboardingWizard() {
     setRouteDismissed(false);
   }, [location.pathname]);
 
-  // Step state: 1 = hardware detection, 2 = mode selection, 3 = provider selection, 4 = voice, 5 = root directory, 6 = summary
+  // Step state: 1 = hardware detection, 2 = mode selection, 3 = provider selection, 4 = voice, 5 = telegram, 6 = root directory, 7 = summary
   const [step, setStep] = useState(1);
 
   // Mode state: "both" pre-selected per UI-SPEC
@@ -135,7 +136,7 @@ export function OnboardingWizard() {
     closeOnboarding();
   }
 
-  // [nexus] Shared workspace creation logic used by both handleSubmit (step 4 direct) and handleStartChat (step 5)
+  // [nexus] Shared workspace creation logic used by both handleSubmit (step 4 direct) and handleStartChat (step 6)
   async function createWorkspace() {
     // Step 1: Create workspace (company) named after VOCAB.appName
     const company = await companiesApi.create({ name: VOCAB.appName });
@@ -262,7 +263,7 @@ export function OnboardingWizard() {
   async function handleStartChat() {
     // Guard: claude_local requires rootDir
     if (defaultAdapter === "claude_local" && !rootDir.trim()) {
-      setError("Root directory is required for Claude Code. Go back to step 5 to set it.");
+      setError("Root directory is required for Claude Code. Go back to step 6 to set it.");
       return;
     }
 
@@ -302,7 +303,7 @@ export function OnboardingWizard() {
         >
           {/* Step indicator */}
           <p className="text-xs text-muted-foreground text-center">
-            {step === 6 ? "Summary" : `Step ${step} of 5`}
+            {step === 7 ? "Summary" : `Step ${step} of 6`}
           </p>
 
           {/* Step 1 — Hardware Detection */}
@@ -442,8 +443,16 @@ export function OnboardingWizard() {
             </>
           )}
 
-          {/* Step 5 — Root Directory (was step 4) */}
+          {/* Step 5 — Telegram Bridge */}
           {step === 5 && (
+            <TelegramStep
+              onNext={() => setStep(6)}
+              onBack={() => setStep(4)}
+            />
+          )}
+
+          {/* Step 6 — Root Directory (was step 5, now step 6) */}
+          {step === 6 && (
             <>
               {/* Header */}
               <div className="flex flex-col gap-2 text-center">
@@ -487,7 +496,7 @@ export function OnboardingWizard() {
 
                 <Button
                   type="button"
-                  onClick={() => setStep(6)}
+                  onClick={() => setStep(7)}
                   disabled={loading || probing}
                   className="w-full"
                 >
@@ -497,7 +506,7 @@ export function OnboardingWizard() {
                 <Button
                   type="button"
                   variant="ghost"
-                  onClick={() => setStep(4)}
+                  onClick={() => setStep(5)}
                   className="w-full"
                   disabled={loading}
                 >
@@ -507,7 +516,7 @@ export function OnboardingWizard() {
                 <Button
                   type="button"
                   variant="ghost"
-                  onClick={() => setStep(6)}
+                  onClick={() => setStep(7)}
                   className="w-full"
                   disabled={loading}
                 >
@@ -517,8 +526,8 @@ export function OnboardingWizard() {
             </>
           )}
 
-          {/* Step 6 — Summary (was step 5) */}
-          {step === 6 && (
+          {/* Step 7 — Summary (was step 6) */}
+          {step === 7 && (
             <OnboardingSummaryStep
               hardwareInfo={hardwareInfo}
               selectedMode={selectedMode}
@@ -527,7 +536,7 @@ export function OnboardingWizard() {
               loading={loading}
               error={error}
               onStartChat={handleStartChat}
-              onBack={() => setStep(5)}
+              onBack={() => setStep(6)}
             />
           )}
         </div>