Flagged marker for history entries

Last of the "should build soon" items from the Burp/ZAP/Caido gap
research - Burp's row highlighting and Caido's Findings both serve
the same real workflow: mark something interesting mid-engagement,
revisit later. Scoped to a boolean flag (★) rather than full free-text
notes/comments, which would need their own text-input overlay for
comparatively modest extra value over a simple marker - tracked as a
real follow-up in PLAN.md, not dropped silently.

internal/store: history gains a flagged column (migrated in for
existing databases the same way source was) plus Store.SetFlagged and
Summary/Entry.Flagged. Search's structured-filter layer (added last
commit for status:/source:) gains flagged:true/false alongside them -
extractStructured already existed for exactly this kind of "pull it out
before it reaches FTS5" filter. internal/ipc gains a "set_flagged"
request. cmd/mitmux: 'f' toggles the flag on the selected history row
(applied optimistically to local state, persisted async - a drift
between local and server state on failure is an acceptable trade-off
for a marker this low-stakes), shown as a ★ column in the list and in
the detail view's title.

store_test.go covers the flagged: parsing (true/false spellings, and
a "looks like it but isn't" case - flagged:maybe - falling through as
literal search text, matching the existing pattern for status:).

Verified live: toggling 'f' shows the star immediately, flagged:true
correctly filtered to just that entry, and a direct SQLite check
confirmed the flag actually persisted to the database (flagged=1),
not just reflected in local UI state.

1 files changed, 8 insertions, 1 deletions

diff --git a/internal/ipc/server.go b/internal/ipc/server.go
index eea0ebb..28279a7 100644
--- a/internal/ipc/server.go
+++ b/internal/ipc/server.go
@@ -178,6 +178,13 @@ func (s *Server) handleConn(conn net.Conn) {
 			}
 			enc.Encode(Response{Type: "intrude_done"})
 
+		case "set_flagged":
+			if err := s.db.SetFlagged(req.ID, req.Flagged); err != nil {
+				enc.Encode(Response{Type: "error", Error: err.Error()})
+				continue
+			}
+			enc.Encode(Response{Type: "flagged"})
+
 		case "rules_list":
 			rs, err := s.db.ListRules()
 			if err != nil {
@@ -259,7 +266,7 @@ func detailFromEntry(e *store.Entry) *EntryDetail {
 			ID: e.ID, StartedAt: e.StartedAt, Duration: e.Duration,
 			Method: e.Method, Scheme: e.Scheme, Host: e.Host, Path: e.Path,
 			StatusCode: e.StatusCode, ReqSize: len(e.RequestRaw), RespSize: len(e.ResponseRaw),
-			Error: e.Error, Source: e.Source,
+			Error: e.Error, Source: e.Source, Flagged: e.Flagged,
 		},
 		RequestRaw: e.RequestRaw, ResponseRaw: e.ResponseRaw,
 		RequestExact: e.RequestExact, ResponseExact: e.ResponseExact,