Initial commit: wireframe packet capture/analysis tool

Terminal packet capture and analysis tool built to learn the C++
memory model (byte layout, alignment, endianness, std::span over
unowned buffers) via a real capture pipeline.

- Hand-rolled L2-L4 decoders (Ethernet, IPv4, IPv6 with extension
  header walking, TCP, UDP) over std::span, no struct-casting
- L7 dissector interface with DNS, HTTP, and TLS SNI implementations
- pcapng read/write for Wireshark-compatible capture files
- Bounded capture queue: drop-on-backpressure for live capture,
  blocking push for faithful file replay
- Kernel-level BPF filtering (-f) and a separate display-only search
  (-g / interactive) that doesn't touch what's captured
- Replay mode (-r) reads a saved pcapng file back through the same
  pipeline as live capture, no root or live device needed
- pcap_stats() surfaces kernel/interface drops invisible to the
  capture queue's own counter
- Three frontends sharing one CaptureSession setup path: CLI, TUI
  (FTXUI, primary), GUI (Dear ImGui + SDL3, secondary)
- 89 unit tests (doctest) plus 9 libFuzzer harnesses covering every
  hand-rolled parser; fuzzing found and fixed a real OOM in the
  pcapng reader (unbounded allocation from an untrusted length field)

1 files changed, 27 insertions, 0 deletions

diff --git a/tests/test_search.cpp b/tests/test_search.cpp
new file mode 100644
index 0000000..ed687e0
--- /dev/null
+++ b/tests/test_search.cpp
@@ -0,0 +1,27 @@
+#include <doctest/doctest.h>
+
+#include "wireframe/search.hpp"
+
+using namespace wireframe;
+
+TEST_CASE("matches_search finds a substring") {
+    CHECK(matches_search("IPv4 10.0.0.1 -> 10.0.0.2 proto=6", "10.0.0.2"));
+}
+
+TEST_CASE("matches_search is case-insensitive") {
+    CHECK(matches_search("DNS query example.COM", "example.com"));
+    CHECK(matches_search("DNS query example.com", "EXAMPLE.COM"));
+}
+
+TEST_CASE("matches_search returns false when the term isn't present") {
+    CHECK_FALSE(matches_search("IPv4 10.0.0.1 -> 10.0.0.2", "192.168.1.1"));
+}
+
+TEST_CASE("matches_search treats an empty term as matching everything") {
+    CHECK(matches_search("anything at all", ""));
+    CHECK(matches_search("", ""));
+}
+
+TEST_CASE("matches_search returns false against an empty haystack with a nonempty term") {
+    CHECK_FALSE(matches_search("", "x"));
+}