Rebrand to Offscale and rework the panel header

Forked from omarchy.tailscale at the packaged commit (omarchy-dev
4.0.0.r1744.gf002044). The `tailscale` branch holds the pristine upstream
subtree history so upstream changes can still be merged in; `master` is
this fork.

- Rename the plugin to pastilhas.offscale: manifest id/name, moduleName
  and ipcTarget, and display strings. Deliberately NOT renamed: the
  lowercase "tailscale" CLI invocations, the TailscaleIPs/TailscaleIPv6
  JSON fields from `tailscale status --json`, and
  authorizeTailscaleOperator. Renaming those loads fine but silently
  breaks peer parsing.
- TailscaleIcon.qml -> OffscaleIcon.qml, now rendering offscale-logo.png
  instead of the 3x3 dot grid, keeping the crossed/warning states.
- Add OffscaleHero.qml: a copy of qs.Ui.PanelHero with a titleComponent
  slot, so the wordmark (offscale-text.png) can replace the title text.
  Otherwise byte-identical to the original, so it stays diffable.
- Drop the cycling hero phrases entirely - the array, the 2.8s timer and
  the metaOpacity fade.
- Show the local machine as a PeerRow of its own, so it gets the same
  layout and copy menu as tailnet peers. Adds `navigable` to PeerRow so
  that row stays out of the peers keyboard cursor.
- Enlarge the bar icon: BarIconButton pins its icon to opticalCanvas, so
  opticalSize/slotSize are overridden alongside iconSize.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Service.qml

@@ -280,7 +280,7 @@ Item {
     exitNodes = running ? tailnetExitNodes.concat(mullvadRegions) : []
   }
 
-  function toggleTailscale() {
+  function toggleOffscale() {
     if (!installed) return
     if (active) down()
     else loginOrUp()
@@ -304,7 +304,7 @@ Item {
     }
     _loginOutput = ""
     _loginError = ""
-    if (needsLogin) actionStatus = "Starting Tailscale login…"
+    if (needsLogin) actionStatus = "Starting Offscale login…"
     else _desired = 1
     _loginInProgress = needsLogin
     _loginUrlOpened = false
@@ -349,7 +349,7 @@ Item {
     if (!installed || operatorProcess.running || userName === "") return
     _operatorOutput = ""
     _operatorError = ""
-    actionStatus = "Authorizing Tailscale operator..."
+    actionStatus = "Authorizing Offscale operator..."
     operatorProcess.command = ["pkexec", "tailscale", "set", "--operator=" + userName]
     operatorProcess.running = true
   }
@@ -449,7 +449,7 @@ Item {
       if (!root._loginInProgress || root._loginUrlOpened) return
       if (!root.openAuthUrlFrom(root.authUrl, true)) {
         root._loginInProgress = false
-        root.actionStatus = "Tailscale login link not available yet"
+        root.actionStatus = "Offscale login link not available yet"
       }
     }
   }
@@ -500,9 +500,9 @@ Item {
         root.parseAccounts("")
         if (/profiles access denied/i.test(stderr) || /profiles access denied/i.test(stdout)) {
           root.accountsAccessDenied = true
-          root.lastError = "Authorize Tailscale operator to show connections"
+          root.lastError = "Authorize Offscale operator to show connections"
         } else {
-          root.lastError = elideStatus(stderr || stdout || "Could not list Tailscale connections")
+          root.lastError = elideStatus(stderr || stdout || "Could not list Offscale connections")
         }
       }
     }
@@ -532,7 +532,7 @@ Item {
       var stderr = String(actionStderr.text || root._actionError || "")
       if (exitCode !== 0) {
         root._desired = -1
-        root.lastError = elideStatus(stderr || stdout || "Tailscale command failed")
+        root.lastError = elideStatus(stderr || stdout || "Offscale command failed")
         root.actionStatus = root.lastError
         actionStatusTimer.restart()
       } else {
@@ -621,13 +621,13 @@ Item {
       var stdout = String(operatorStdout.text || root._operatorOutput || "")
       var stderr = String(operatorStderr.text || root._operatorError || "")
       if (exitCode !== 0) {
-        root.lastError = elideStatus(stderr || stdout || "Tailscale authorization failed")
+        root.lastError = elideStatus(stderr || stdout || "Offscale authorization failed")
         root.actionStatus = root.lastError
         actionStatusTimer.restart()
       } else {
         root.accountsAccessDenied = false
         root.lastError = ""
-        root.actionStatus = "Tailscale operator authorized"
+        root.actionStatus = "Offscale operator authorized"
         actionStatusTimer.restart()
         root._lastAccountsRefreshMs = 0
       }