fix: node detail panel Details/Analytics links don't navigate (#779)

Fixes #778

## Problem

The Details and Analytics links in the node side panel don't navigate
when clicked. This is a regression from #739 (desktop node deep
linking).

**Root cause:** When a node is selected, `selectNode()` uses
`history.replaceState()` to set the URL to `#/nodes/{pubkey}`. The
Details link has `href="#/nodes/{pubkey}"` — the same hash. Clicking an
anchor with the same hash as the current URL doesn't fire the
`hashchange` event, so the SPA router never triggers navigation.

## Fix

Added a click handler on the `nodesRight` panel that intercepts clicks
on `.btn-primary` navigation links:

1. `e.preventDefault()` to stop the default anchor behavior
2. If the current hash already matches the target, temporarily clear it
via `replaceState`
3. Set `location.hash` to the target, which fires `hashchange` and
triggers the SPA router

This handles both the Details link (`#/nodes/{pubkey}`) and the
Analytics link (`#/nodes/{pubkey}/analytics`).

## Testing

- All frontend helper tests pass (552/552)
- All packet filter tests pass (62/62)
- All aging tests pass (29/29)
- Go server tests pass

---------

Co-authored-by: you <you@example.com>

public/nodes.js

@@ -1039,6 +1039,18 @@
 
     // #630: Close button for node detail panel (important for mobile full-screen overlay)
     document.getElementById('nodesRight').addEventListener('click', function(e) {
+      // #778: Details/Analytics links don't navigate because replaceState
+      // already set the hash to #/nodes/PUBKEY, so clicking <a href="#/nodes/PUBKEY">
+      // is a same-hash no-op. Force navigation by temporarily clearing the hash.
+      var link = e.target.closest('a.btn-primary[href^="#/nodes/"]');
+      if (link) {
+        e.preventDefault();
+        var target = link.getAttribute('href');
+        // Always clear and reassign — hashchange won't fire if hash already matches
+        history.replaceState(null, '', '#/');
+        location.hash = target.substring(1);
+        return;
+      }
       if (e.target.closest('.panel-close-btn')) {
         const panel = document.getElementById('nodesRight');
         panel.classList.add('empty');

test-e2e-playwright.js

@@ -231,6 +231,30 @@ async function run() {
     assert(hasStatus, 'No status indicator found in node detail');
   });
 
+  // Test: Node side panel Details link navigates to full detail page (#778)
+  await test('Node side panel Details link navigates', async () => {
+    await page.goto(`${BASE}/#/nodes`, { waitUntil: 'domcontentloaded' });
+    await page.waitForSelector('table tbody tr');
+    // Click first row to open side panel
+    const firstRow = await page.$('table tbody tr');
+    assert(firstRow, 'No node rows found');
+    await firstRow.click();
+    await page.waitForSelector('.node-detail');
+    // Find the Details link in the side panel
+    const detailsLink = await page.$('#nodesRight a.btn-primary[href^="#/nodes/"]');
+    assert(detailsLink, 'Details link not found in side panel');
+    const href = await detailsLink.getAttribute('href');
+    // Click the Details link — this should navigate to the full detail page
+    await detailsLink.click();
+    // Wait for navigation — the full detail page has sections like neighbors/packets
+    await page.waitForFunction((expectedHash) => {
+      return location.hash === expectedHash;
+    }, href, { timeout: 5000 });
+    // Verify we're on the full detail page (should have section tabs or detail content)
+    const hash = await page.evaluate(() => location.hash);
+    assert(hash === href, `Expected hash "${href}" but got "${hash}"`);
+  });
+
   // Test: Nodes page has WebSocket auto-update listener (#131)
   await test('Nodes page has WebSocket auto-update', async () => {
     await page.goto(`${BASE}/#/nodes`, { waitUntil: 'domcontentloaded' });