fix(observer): ensure inline script injection before </body> for Electron execution + add BEACON diagnostic ping

- html-patcher: relocate inline script from after </html> to before </body>
- html-patcher: clean up duplicate </html> tags from previous bad insertions
- observer-script: add immediate BEACON fetch to /ping on script load
- http-bridge: add diagnostic request logging for non-polling endpoints
- devlog 003: crash recovery session notes

extension/src/http-bridge.ts

@@ -79,6 +79,11 @@ export function startHttpBridge(ctx: HttpBridgeContext, sdk: any): Promise<numbe
 
                 const url = new URL(req.url, `http://127.0.0.1`);
 
+                // DIAGNOSTIC: log ALL requests (except noisy polling endpoints)
+                if (!['/trigger-click', '/deep-inspect-trigger'].includes(url.pathname)) {
+                    ctx.logToFile(`[HTTP-REQ] ${req.method} ${url.pathname}`);
+                }
+
                 // POST /pending — renderer reports a detected approval button
                 if (req.method === 'POST' && url.pathname === '/pending') {
                     _handlePending(req, res, ctx);