Let the Dropbox panel pause and resume syncing

Click the Dropbox hero icon to pause or resume the daemon (dropbox-cli
stop/start), with a tooltip on hover. When paused, both the hero and the
bar icon grey out and the phrase reads "Syncing paused". The greying is
optimistic so it reacts the instant you click, then reconciles with the
real daemon state once it settles (reverting if the command failed).

Also fix status.py's running detection, which was stuck reporting true:
this dropbox-cli inverts the `running` exit code and reports "isn't
running" (not "not running") when stopped, so the paused state never
showed. Detection now keys off the status text alone.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

shell/plugins/panels/dropbox/Service.qml

@@ -13,6 +13,12 @@ Item {
   property bool installed: false
   property bool running: false
   property bool authenticated: false
+
+  // Optimistic sync state so the UI reacts the instant you click, rather than
+  // waiting for dropboxd to actually settle. _desired is -1 while we just
+  // follow the real state, or 0/1 while a pause/resume is still catching up.
+  property int _desired: -1
+  readonly property bool active: _desired === -1 ? running : (_desired === 1)
   property bool refreshing: false
   property string statusText: "Checking…"
   property string accountPath: ""
@@ -26,7 +32,7 @@ Item {
   property string lastError: ""
 
   readonly property int refreshIntervalSec: intSetting("refreshIntervalSec", 60, 10, 3600)
-  readonly property bool busy: statusProcess.running || loginProcess.running
+  readonly property bool busy: statusProcess.running || loginProcess.running || controlProcess.running
   readonly property string helperPath: (omarchyPath || "") + "/shell/plugins/panels/dropbox/status.py"
 
   property string _statusOutput: ""
@@ -34,6 +40,8 @@ Item {
   property string _loginOutput: ""
   property string _loginError: ""
   property bool _loginUrlOpened: false
+  property string _controlOutput: ""
+  property string _controlError: ""
 
   function setting(name, fallback) {
     var value = settings ? settings[name] : undefined
@@ -66,6 +74,8 @@ Item {
     installed = parsed.installed === true
     running = parsed.running === true
     authenticated = parsed.authenticated === true
+    // Reality caught up to the pending pause/resume — stop overriding.
+    if (_desired !== -1 && running === (_desired === 1)) _desired = -1
     statusText = String(parsed.statusText || (installed ? "Stopped" : "Not installed"))
     accountPath = String(parsed.accountPath || "")
     plan = String(parsed.plan || "")
@@ -92,6 +102,30 @@ Item {
     loginProcess.running = true
   }
 
+  function pause() {
+    runControl(["dropbox-cli", "stop"], 0)
+  }
+
+  function resume() {
+    runControl(["dropbox-cli", "start"], 1)
+  }
+
+  function toggleRunning() {
+    if (active) pause()
+    else resume()
+  }
+
+  function runControl(command, desired) {
+    // No progress status here — the greyed icon and hero phrase already convey
+    // the pause/resume; only surface a message if the command fails.
+    if (!installed || controlProcess.running) return
+    _desired = desired
+    _controlOutput = ""
+    _controlError = ""
+    controlProcess.command = command
+    controlProcess.running = true
+  }
+
   function openFile(file) {
     if (!file || !file.path) return
     Quickshell.execDetached(["uwsm-app", "--", "nautilus", "--select", fileUri(String(file.path))])
@@ -146,6 +180,26 @@ Item {
     onTriggered: root.actionStatus = ""
   }
 
+  Timer {
+    // dropboxd takes a few (variable) seconds to settle after stop/start, so
+    // re-poll a handful of times to reflect the new state without waiting for
+    // the next periodic refresh.
+    id: settleTimer
+    property int ticks: 0
+    interval: 1500
+    repeat: true
+    running: false
+    onTriggered: {
+      settleTimer.ticks += 1
+      root.refresh()
+      if (settleTimer.ticks >= 4) {
+        settleTimer.ticks = 0
+        settleTimer.running = false
+        root._desired = -1
+      }
+    }
+  }
+
   Process {
     id: statusProcess
     running: false
@@ -180,4 +234,27 @@ Item {
       delayedRefresh.restart()
     }
   }
+
+  Process {
+    id: controlProcess
+    running: false
+    command: []
+    stdout: StdioCollector { id: controlStdout; waitForEnd: true; onStreamFinished: root._controlOutput = text }
+    stderr: StdioCollector { id: controlStderr; waitForEnd: true; onStreamFinished: root._controlError = text }
+    onExited: function(exitCode) {
+      var stdout = String(controlStdout.text || root._controlOutput || "")
+      var stderr = String(controlStderr.text || root._controlError || "")
+      if (exitCode !== 0) {
+        root._desired = -1
+        root.lastError = root.elideStatus(stderr || stdout || "Dropbox command failed")
+        root.actionStatus = root.lastError
+      } else {
+        root.lastError = ""
+        root.actionStatus = ""
+      }
+      settleTimer.ticks = 0
+      settleTimer.restart()
+      delayedRefresh.restart()
+    }
+  }
 }