App: crash reports and a log file; Help › Report a Bug (#107)

The desktop app installs the crash reporter and a log file at start
(both in a temporary folder in --control and CI runs, #266), journals
the window's commands (background jobs included) and every control
request's method, and ends the journal on a clean exit. A start after a
crash asks: "FieldCraft closed unexpectedly", Report It… or Not Now.

Help › Report a Bug (also Tools › Help and ui.start
diagnostics.bug_report) shows exactly what the GitHub bug form will be
filled with: the version, the OS, the last error, and for a crash where
it happened. Share my session adds the replayable commands, Include the
model file the model. Open GitHub Issue opens the form in the browser
through the system's opener; files to attach are saved to
bug-reports/<time>/ and a long session goes on the clipboard. Nothing is
sent without that click and the user's submit on GitHub.

The control channel answers the new prompts (crashed: report, close;
report_bug: set, close) and ui.inspect shows the draft; it never opens
the browser.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UhhZMBTviDQxZvwnyP89fo

crates/ui-egui/src/appbar.rs

@@ -336,7 +336,14 @@ fn help_menu(app: &mut ModelApp, ui: &mut egui::Ui) {
     ui.label("Left drag orbits (or pans or zooms: the navigation bar), right or middle drag pans, the wheel zooms, F or a double click fits.");
     ui.label(format!("S or {} searches every command; the command line at the bottom runs `id {{json}}`.", shortcut("K")));
     ui.separator();
+    let report = ui
+        .button("Report a Bug…")
+        .on_hover_text("Draft a GitHub issue with the version, the OS and the last error; nothing is sent until you submit it")
+        .clicked();
     ui.label(egui::RichText::new(format!("FieldCraft {}", crate::VERSION)).color(t.text_dim));
+    if report {
+        app.report_bug(None);
+    }
     if let Some(n) = open {
         app.ui.menu = None;
         app.open_sample(n);