Repeater: raw-byte send/resend

Implements build-order step 4, the feature the plan calls out as used
daily. internal/proxy/repeat.go adds Server.Repeat(scheme, host, raw):
dials fresh (HTTP/1.1-only - raw edited text has no equivalent in
HTTP/2's binary framing), writes raw exactly as given with no framing
correction or header injection, and captures the exact response bytes.
This is deliberately separate from forward()'s parsed-*http.Request path
since Repeater's entire point is letting a malformed/edited request
reach the wire unmodified.

Repeater sends are recorded to the same history table as proxy traffic
(added a "source" column: "proxy" vs "repeater") so they show up in the
unified history view and the live subscribe stream, not a separate silo.

internal/ipc gains a "repeat" request/response pair; cmd/mitmuxd wires
proxy.Server into ipc.NewServer via a small Repeater interface so the
daemon keeps owning all network I/O and the TUI stays a thin client.
cmd/mitmux gains a repeater view (bubbles/textarea for the editable raw
request, a read-only viewport for the response), reachable with 'r' from
either the list or detail view, ctrl+r to send.

One real bug found via testing: bubbles/textarea only understands LF,
but HTTP/1.1 requires CRLF, so loading raw bytes straight into it split
each line in two on render. Fixed by normalizing CRLF<->LF at the editor
boundary only (load: strip \r; send: restore it) - documented as a
narrow, known trade-off for bodies with their own embedded LF line
breaks, which is the cost of being able to edit raw HTTP as text at all.

Verified live: edited and sent a plain-HTTP repeater request (confirmed
in SQLite that the edit - including an intentional extra blank line from
imprecise cursor navigation during testing - went out completely
unmodified, which is the correct behavior: mitmux must never "fix" what
the user typed), and sent an HTTPS repeater request against a freshly
captured entry, both getting real 200 responses with exact response
bytes back.

1 files changed, 4 insertions, 4 deletions

diff --git a/cmd/mitmuxd/main.go b/cmd/mitmuxd/main.go
index 0d7f214..812e146 100644
--- a/cmd/mitmuxd/main.go
+++ b/cmd/mitmuxd/main.go
@@ -70,17 +70,17 @@ func main() {
 	defer os.Remove(sockFile)
 	log.Printf("control socket: %s", sockFile)
 
+	srv := proxy.New(*listen, root, db)
+
 	hub := ipc.NewHub()
-	ipcSrv := ipc.NewServer(db, hub)
+	srv.OnEntry = ipc.LogAndBroadcast(hub)
+	ipcSrv := ipc.NewServer(db, hub, srv)
 	go func() {
 		if err := ipcSrv.Serve(sockLn); err != nil {
 			log.Printf("control socket: %v", err)
 		}
 	}()
 
-	srv := proxy.New(*listen, root, db)
-	srv.OnEntry = ipc.LogAndBroadcast(hub)
-
 	errCh := make(chan error, 1)
 	go func() {
 		errCh <- srv.ListenAndServe()