Add Fyne GUI and portable --data-dir mode to nymdrop-reader

Extract reader logic (key management, embedded nym-client lifecycle,
receive loop, decrypt, save) into internal/reader as a Hooks-driven
package, shared by both the existing headless CLI and a new --gui mode
built with Fyne. Add --data-dir to make a reader instance fully
self-contained: privkey, inbox, and the embedded nym-client's own state
(normally fixed to $HOME/.nym) all live under the given directory via a
HOME override on the subprocess, enabling zero-trace USB operation.

CLI default behavior is unchanged (same paths, same protocol) so the
pietro deployment is unaffected.

1 files changed, 33 insertions, 0 deletions

diff --git a/go.mod b/go.mod
index 1a89b6f..1ca2138 100644
--- a/go.mod
+++ b/go.mod
@@ -9,6 +9,39 @@ require (
 )
 
 require (
+	fyne.io/fyne/v2 v2.8.0 // indirect
+	fyne.io/systray v1.12.2 // indirect
+	github.com/BurntSushi/toml v1.6.0 // indirect
+	github.com/anthonynsimon/bild v0.14.0 // indirect
 	github.com/awnumar/memcall v0.4.0 // indirect
+	github.com/clipperhouse/uax29/v2 v2.2.0 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/fredbi/uri v1.1.1 // indirect
+	github.com/fsnotify/fsnotify v1.9.0 // indirect
+	github.com/fyne-io/gl-js v0.2.1-0.20260315212741-029c47fd27e8 // indirect
+	github.com/fyne-io/glfw-js v0.4.0 // indirect
+	github.com/fyne-io/image v0.1.1 // indirect
+	github.com/fyne-io/oksvg v0.2.0 // indirect
+	github.com/go-gl/gl v0.0.0-20260331235117-4566fea9a276 // indirect
+	github.com/go-gl/glfw/v3.4/glfw v0.1.0-pre.1.0.20260707082822-2a407d02d01a // indirect
+	github.com/go-text/render v0.2.1 // indirect
+	github.com/go-text/typesetting v0.3.4 // indirect
+	github.com/godbus/dbus/v5 v5.2.2 // indirect
+	github.com/hack-pad/go-indexeddb v0.3.2 // indirect
+	github.com/hack-pad/safejs v0.1.0 // indirect
+	github.com/jeandeaual/go-locale v0.0.0-20250612000132-0ef82f21eade // indirect
+	github.com/jsummers/gobmp v0.0.0-20230614200233-a9de23ed2e25 // indirect
+	github.com/mattn/go-runewidth v0.0.24 // indirect
+	github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646 // indirect
+	github.com/nicksnyder/go-i18n/v2 v2.5.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/rymdport/portal v0.4.2 // indirect
+	github.com/srwiley/oksvg v0.0.0-20221011165216-be6e8873101c // indirect
+	github.com/srwiley/rasterx v0.0.0-20220730225603-2ab79fcdd4ef // indirect
+	github.com/stretchr/testify v1.11.1 // indirect
+	github.com/yuin/goldmark v1.8.2 // indirect
+	golang.org/x/image v0.24.0 // indirect
 	golang.org/x/sys v0.44.0 // indirect
+	golang.org/x/text v0.37.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )