fix(perplexity-web): always navigate home before new search

Perplexity was returning stale results because the page stayed on
the previous search URL. Now always navigates to home page, clears
input, types fresh query, and waits for URL change confirmation.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: sjhu

src/zero-token/providers/perplexity-web-client-browser.ts

@@ -146,11 +146,9 @@ export class PerplexityWebClientBrowser {
     // Perplexity's /search API now returns HTML, not SSE, so we interact via DOM.
     const page = this.page;
 
-    // Navigate to home page if currently on a search result page
-    if (page.url().includes("/search/") || page.url().includes("/c/")) {
-      await page.goto("https://www.perplexity.ai/", { waitUntil: "domcontentloaded" });
-      await page.waitForTimeout(2000);
-    }
+    // Always navigate to home page for a fresh search
+    await page.goto("https://www.perplexity.ai/", { waitUntil: "domcontentloaded" });
+    await page.waitForTimeout(2000);
 
     // Find and focus the input
     const inputSel = 'div[contenteditable="true"], [role="textbox"], textarea';
@@ -161,18 +159,23 @@ export class PerplexityWebClientBrowser {
     await inputHandle.click();
     await page.waitForTimeout(300);
 
-    // Type message using Playwright keyboard (more reliable than dispatchEvent)
+    // Clear any residual text, then type message
+    await page.keyboard.press("Meta+a");
+    await page.keyboard.press("Backspace");
     await page.keyboard.type(message, { delay: 20 });
     await page.waitForTimeout(500);
 
     // Press Enter to submit
     await page.keyboard.press("Enter");
     console.log("[Perplexity Web Browser] DOM: typed message and pressed Enter");
 
-    // Wait for URL change (Perplexity navigates to /search/... on submit)
+    // Wait for URL to change from home to a search result page
     try {
-      await page.waitForURL(/perplexity\.ai\/(search|c)\//, { timeout: 15000 });
-      console.log("[Perplexity Web Browser] DOM: navigated to search result page");
+      await page.waitForURL(
+        (url) => url.pathname.startsWith("/search/") || url.pathname.startsWith("/c/"),
+        { timeout: 15000 },
+      );
+      console.log("[Perplexity Web Browser] DOM: navigated to", page.url());
     } catch {
       console.log("[Perplexity Web Browser] DOM: no URL change after Enter, polling anyway");
     }