fix clicks from the menu bar app: find tmux without homebrew on PATH

launchd starts the menu bar app with PATH=/usr/bin:/bin:/usr/sbin:/sbin,
so the `dingger focus` it runs for every click (panel rows, menu rows, the
jump shortcut) could not find homebrew's tmux and failed with a misleading
"no tmux client attached"; the app discarded the error. dingger now finds
tmux on PATH or in the usual install locations (DINGGER_TMUX overrides),
reports a missing tmux as such, and the app logs failed jumps.

also: panel rows own every click inside them (labels took the clicks and
counted as window-drag background).

e2e step 14 repeats the menu bar row click and dingger focus under
launchd's environment; both fail with the previous binaries.

3 files changed, 42 insertions, 4 deletions

diff --git a/menubar/main.swift b/menubar/main.swift
index e9294e8..c1891ab 100644
--- a/menubar/main.swift
+++ b/menubar/main.swift
@@ -136,8 +136,8 @@ final class Menubar: NSObject, NSApplicationDelegate, NSMenuDelegate {
     /// The jump shortcut: same as clicking the tmux status line.
     @objc private func jumpToTopWaiting() {
         DispatchQueue.global().async {
-            let output = run(dinggerBinary, ["focus"]) ?? "failed"
-            log("jump: dingger focus \(output.isEmpty ? "ok" : output)")
+            let result = runReporting(dinggerBinary, ["focus"])
+            log("jump: dingger focus \(result.ok ? "ok" : "failed: \(result.output)")")
             DispatchQueue.main.async { self.refresh() }
         }
     }
@@ -155,6 +155,7 @@ final class Menubar: NSObject, NSApplicationDelegate, NSMenuDelegate {
     }
 
     private func jump(to paneId: String) {
+        log("jump: to \(paneId)")
         DispatchQueue.global().async {
             focus(paneId)
             DispatchQueue.main.async { self.refresh() }
diff --git a/menubar/model.swift b/menubar/model.swift
index e60cb84..67a693a 100644
--- a/menubar/model.swift
+++ b/menubar/model.swift
@@ -126,12 +126,38 @@ func run(_ path: String, _ args: [String]) -> String? {
     return String(data: data, encoding: .utf8)
 }
 
+/// Like run(), but reports why a command failed: exit status and stderr.
+func runReporting(_ path: String, _ args: [String]) -> (ok: Bool, output: String) {
+    let process = Process()
+    process.executableURL = URL(fileURLWithPath: path)
+    process.arguments = args
+    let out = Pipe(), err = Pipe()
+    process.standardOutput = out
+    process.standardError = err
+    do {
+        try process.run()
+    } catch {
+        return (false, "cannot run \(path): \(error.localizedDescription)")
+    }
+    let stdout = String(data: out.fileHandleForReading.readDataToEndOfFile(), encoding: .utf8) ?? ""
+    let stderr = String(data: err.fileHandleForReading.readDataToEndOfFile(), encoding: .utf8) ?? ""
+    process.waitUntilExit()
+    let text = (stdout + stderr).trimmingCharacters(in: .whitespacesAndNewlines)
+    return (process.terminationStatus == 0, text)
+}
+
+/// The tmux binary: launchd gives apps a PATH without Homebrew, so look in
+/// the usual places.
+let tmuxBinary: String = environment["DINGGER_TMUX"]
+    ?? ["/opt/homebrew/bin/tmux", "/usr/local/bin/tmux", "/usr/bin/tmux"]
+        .first { FileManager.default.isExecutableFile(atPath: $0) } ?? "/opt/homebrew/bin/tmux"
+
 func tmux(_ args: [String]) -> String? {
     var all = ["-u"]
     if let socket = environment["DINGGER_TMUX_SOCKET"] {
         all += ["-L", socket]
     }
-    return run(environment["DINGGER_TMUX"] ?? "/opt/homebrew/bin/tmux", all + args)
+    return run(tmuxBinary, all + args)
 }
 
 let dinggerBinary = environment["DINGGER_BIN"] ?? (NSHomeDirectory() + "/.local/bin/dingger")
@@ -162,7 +188,8 @@ func fetchRows() -> [Row] {
 /// Show the pane and mark it attended; the same code path as the tmux
 /// status-line click.
 func focus(_ paneId: String) {
-    _ = run(dinggerBinary, ["focus", "--pane", paneId])
+    let result = runReporting(dinggerBinary, ["focus", "--pane", paneId])
+    if !result.ok { log("jump: dingger focus --pane \(paneId) failed: \(result.output)") }
 }
 
 // MARK: rendering
diff --git a/menubar/panel.swift b/menubar/panel.swift
index 357ff91..e6ff569 100644
--- a/menubar/panel.swift
+++ b/menubar/panel.swift
@@ -151,6 +151,15 @@ private class ClickView: NSView {
 
     override func acceptsFirstMouse(for event: NSEvent?) -> Bool { true }
 
+    // Own every click inside, including over labels: a text field would
+    // otherwise take the click (and count as a window-drag background).
+    override func hitTest(_ point: NSPoint) -> NSView? {
+        bounds.contains(convert(point, from: superview)) ? self : nil
+    }
+
+    // Dragging is done here (performDrag), not by the window server.
+    override var mouseDownCanMoveWindow: Bool { false }
+
     override func updateTrackingAreas() {
         super.updateTrackingAreas()
         trackingAreas.forEach(removeTrackingArea)
@@ -170,6 +179,7 @@ private class ClickView: NSView {
     }
 
     override func mouseUp(with event: NSEvent) {
+        log("panel: mouse up (dragged: \(dragged))")
         if !dragged { onClick() }
     }
 }