fix: C-01 WebRTC policy value, C-02 scoped taskkill, C-04 preflight race, E-11 socket timeout, E-27 ban test dedup, full audit doc

proxy_chain_manager/app.py

@@ -1999,6 +1999,10 @@ def _main_inner() -> None:
                 root.after(0, lambda: _pf_set("target", "fail", "chain not running"))
 
             # ── Final summary ─────────────────────────────────────────────────
+            # Schedule _final via root.after(0, ...) so it is enqueued AFTER
+            # all previously-scheduled root.after(0, ...) callbacks (which
+            # populate `warns`).  A fixed 200 ms delay could fire before those
+            # callbacks execute on a slow main thread.
             def _final() -> None:
                 pf_running[0] = False
                 if warns:
@@ -2006,7 +2010,7 @@ def _main_inner() -> None:
                 else:
                     pf_summary_var.set("✓ All pre-flight checks passed — good to go.")
 
-            root.after(200, _final)
+            root.after(0, _final)
 
         threading.Thread(target=work, daemon=True).start()