Start the setup wizard blank and add a Run setup again button

The first-run seed no longer inserts the original vendor's name, address, contact
details, PAN or bank account; the wizard now starts empty and requires a name and
state. Settings > Data gets a Run setup again button that clears the onboarded flag.
Re-running the wizard keeps the active invoice series unless the prefix or padding
changes. The sample logo moves out of public/ so it no longer ships in the app.

src/lib/selfTestE2e.ts

@@ -7,7 +7,8 @@ import type { BankAccount, Invoice, InvoiceInput, Settings } from "./types";
 
 /**
  * The end-to-end invoice flow through the real IPC, run against the fresh database the self-test
- * launches with (it seeds the unregistered vendor, a default bank and an active series).
+ * launches with. The fresh database is neutral (no vendor, no bank), so the first step provisions a
+ * fake vendor and bank the way the setup wizard would.
  */
 
 const today = () => {
@@ -28,11 +29,32 @@ export async function runE2eSteps(log: StepLog, reportPath: string): Promise<voi
   let bank!: BankAccount;
   let invoice: Invoice | null = null;
 
-  const loaded = await log.run("e2e: get settings and default bank", async () => {
+  const loaded = await log.run("e2e: provision vendor and bank, get settings", async () => {
     s = await api.getSettings();
-    const banks = await api.listBanks();
+    let banks = await api.listBanks();
+    if (banks.length === 0) {
+      const saved = await api.saveBank({
+        id: null,
+        label: "Primary",
+        bankName: "Self-test Bank",
+        accountName: "Self-test Vendor",
+        accountNo: "000000000000",
+        branch: "000001",
+        ifsc: "TEST0000001",
+        isDefault: true,
+      });
+      s = await api.saveSettings({
+        ...s,
+        vendorName: s.vendorName || "Self-test Vendor",
+        vendorAddress: s.vendorAddress || "1 Test Road, Bengaluru - 560001",
+        vendorStateCode: s.vendorStateCode || "29",
+        defaultBankId: saved.id,
+        onboarded: true,
+      });
+      banks = await api.listBanks();
+    }
     const found = banks.find((b) => b.id === s.defaultBankId) ?? banks[0];
-    if (!found) throw new Error("the fresh database has no bank account");
+    if (!found) throw new Error("no bank account after provisioning");
     bank = found;
     return `${s.vendorName}, ${s.gstRegistration}, state ${s.vendorStateCode}, bank "${bank.label}"`;
   });