Land remaining unmerged branch work: single-instance follow-ups and browser extensions

CHANGELOG.md

@@ -22,7 +22,7 @@ Programa is a fork of [cmux](https://github.com/manaflow-ai/cmux); for history p
 - Clearing browser history now stays cleared after a temporary disk deletion failure or app termination.
 - Escape now cancels in-progress terminal input for Japanese, Chinese, and Korean keyboards even while the command palette is still opening or has just closed.
 - Cmd+D now confirms only the close alert in the window that received the shortcut, so another window's alert can no longer close the wrong tab or steal a split command.
-- Launching two copies of Programa at nearly the same time now deterministically keeps the newer instance instead of allowing both processes to terminate each other.
+- Concurrent Programa launches now use exact process identities and a durable per-target responsive state so overlapping contenders cannot force-close a healthy instance. Requests keep generation-owned cleanup, recognized stale state is pruned in bounded batches, live requesters are authenticated from running code, and an unresponsive instance can only be force-closed through a Cancel-first data-loss warning.
 - Browser imports now treat Unicode domains and their Punycode forms as the same filter, so internationalized domains no longer silently import zero matching cookies or history entries.
 - Socket automation no longer hangs on split Unicode requests or unsubscribe races, and malformed telemetry can no longer crash the app or grow retained workspace state without bounds.
 - Large command output no longer deadlocks the CLI or background Git checks, and stalled Git probes now time out instead of accumulating work.

GhosttyTabs.xcodeproj/project.pbxproj

@@ -150,6 +150,8 @@
 		NRBR0011 /* BrowserPanelWebDelegates.swift in Sources */ = {isa = PBXBuildFile; fileRef = NRBR0012 /* BrowserPanelWebDelegates.swift */; };
 		NRBR0013 /* BrowserUserProxySettings.swift in Sources */ = {isa = PBXBuildFile; fileRef = NRBR0014 /* BrowserUserProxySettings.swift */; };
 		NRBR0015 /* IMECompositionMessageHandler.swift in Sources */ = {isa = PBXBuildFile; fileRef = NRBR0016 /* IMECompositionMessageHandler.swift */; };
+		NRBR0019 /* BrowserExtensionManager.swift in Sources */ = {isa = PBXBuildFile; fileRef = NRBR0020 /* BrowserExtensionManager.swift */; };
+		NRBR0021 /* BrowserExtensionAdapters.swift in Sources */ = {isa = PBXBuildFile; fileRef = NRBR0022 /* BrowserExtensionAdapters.swift */; };
 		NRBR0017 /* WebViewRepresentable.swift in Sources */ = {isa = PBXBuildFile; fileRef = NRBR0018 /* WebViewRepresentable.swift */; };
 		A5FF0013 /* BrowserDataImport.swift in Sources */ = {isa = PBXBuildFile; fileRef = A5FF0003 /* BrowserDataImport.swift */; };
 		A500RG01 /* ReactGrab.swift in Sources */ = {isa = PBXBuildFile; fileRef = A500RG00 /* ReactGrab.swift */; };
@@ -578,6 +580,8 @@
 		NRBR0012 /* BrowserPanelWebDelegates.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Panels/BrowserPanelWebDelegates.swift; sourceTree = "<group>"; };
 		NRBR0014 /* BrowserUserProxySettings.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Panels/BrowserUserProxySettings.swift; sourceTree = "<group>"; };
 		NRBR0016 /* IMECompositionMessageHandler.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Panels/IMECompositionMessageHandler.swift; sourceTree = "<group>"; };
+		NRBR0020 /* BrowserExtensionManager.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Panels/BrowserExtensionManager.swift; sourceTree = "<group>"; };
+		NRBR0022 /* BrowserExtensionAdapters.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Panels/BrowserExtensionAdapters.swift; sourceTree = "<group>"; };
 		NRBR0018 /* WebViewRepresentable.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Panels/WebViewRepresentable.swift; sourceTree = "<group>"; };
 		A5FF0003 /* BrowserDataImport.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Panels/BrowserDataImport.swift; sourceTree = "<group>"; };
 		A500RG00 /* ReactGrab.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Panels/ReactGrab.swift; sourceTree = "<group>"; };
@@ -1089,6 +1093,8 @@
 				NRBR0012 /* BrowserPanelWebDelegates.swift */,
 				NRBR0014 /* BrowserUserProxySettings.swift */,
 				NRBR0016 /* IMECompositionMessageHandler.swift */,
+				NRBR0020 /* BrowserExtensionManager.swift */,
+				NRBR0022 /* BrowserExtensionAdapters.swift */,
 				NRBR0018 /* WebViewRepresentable.swift */,
 				A5FF0003 /* BrowserDataImport.swift */,
 				A500RG00 /* ReactGrab.swift */,
@@ -1653,6 +1659,8 @@
 				NRBR0011 /* BrowserPanelWebDelegates.swift in Sources */,
 				NRBR0013 /* BrowserUserProxySettings.swift in Sources */,
 				NRBR0015 /* IMECompositionMessageHandler.swift in Sources */,
+				NRBR0019 /* BrowserExtensionManager.swift in Sources */,
+				NRBR0021 /* BrowserExtensionAdapters.swift in Sources */,
 				NRBR0017 /* WebViewRepresentable.swift in Sources */,
 				A5FF0013 /* BrowserDataImport.swift in Sources */,
 				A500RG01 /* ReactGrab.swift in Sources */,

Resources/Localizable.xcstrings

@@ -5718,6 +5718,12 @@
             "state": "translated",
             "value": "Cancel"
           }
+        },
+        "ja": {
+          "stringUnit": {
+            "state": "translated",
+            "value": "キャンセル"
+          }
         }
       }
     },
@@ -7392,6 +7398,57 @@
         }
       }
     },
+    "dialog.singleInstanceNotResponding.forceClose": {
+      "extractionState": "manual",
+      "localizations": {
+        "en": {
+          "stringUnit": {
+            "state": "translated",
+            "value": "Force Close"
+          }
+        },
+        "ja": {
+          "stringUnit": {
+            "state": "translated",
+            "value": "強制終了"
+          }
+        }
+      }
+    },
+    "dialog.singleInstanceNotResponding.message": {
+      "extractionState": "manual",
+      "localizations": {
+        "en": {
+          "stringUnit": {
+            "state": "translated",
+            "value": "The existing Programa instance is not responding. Force closing it may lose unsaved terminal or session state."
+          }
+        },
+        "ja": {
+          "stringUnit": {
+            "state": "translated",
+            "value": "既存のProgramaインスタンスが応答していません。強制終了すると、保存されていないターミナルまたはセッションの状態が失われる可能性があります。"
+          }
+        }
+      }
+    },
+    "dialog.singleInstanceNotResponding.title": {
+      "extractionState": "manual",
+      "localizations": {
+        "en": {
+          "stringUnit": {
+            "state": "translated",
+            "value": "Programa Isn’t Responding"
+          }
+        },
+        "ja": {
+          "stringUnit": {
+            "state": "translated",
+            "value": "Programaが応答していません"
+          }
+        }
+      }
+    },
     "error.clipboardFolderPath": {
       "extractionState": "manual",
       "localizations": {