feat(split-screen): redesign split screen with free-form panes and pane picker

src/ui/locales/en.json

@@ -217,7 +217,7 @@
     "workflow_palette": "Command palette",
     "workflow_palette_desc": "Jump to any server or action by typing. Tap Shift twice to open it.",
     "workflow_split": "Split screen",
-    "workflow_split_desc": "Show up to four tabs side by side to watch logs while you work.",
+    "workflow_split_desc": "Show several tabs side by side, for example to watch logs while you work.",
     "workflow_dock": "Side panel",
     "workflow_dock_desc": "Middle click or right click a sidebar icon to open it as a tab or pin it to the right.",
     "securityTitle": "Keeping your logins safe",
@@ -266,12 +266,10 @@
     "serverStats": "Host Metrics",
     "admin": "Admin",
     "userProfile": "User Profile",
-    "splitScreen": "Split Screen",
     "confirmClose": "Close this active session?",
     "close": "Close",
     "cancel": "Cancel",
     "sshManager": "SSH Manager",
-    "cannotSplitTab": "Cannot split this tab",
     "hostTabTitle": "{{username}}@{{ip}}:{{port}}",
     "copyPassword": "Copy Password",
     "copySudoPassword": "Copy Sudo Password",
@@ -1035,9 +1033,55 @@
     "pluginActions": "More actions"
   },
   "splitScreen": {
-    "paneEmpty": "Pane {{index}} - empty",
-    "noTabAssigned": "No tab assigned",
-    "focusedPane": "Active pane"
+    "title": "Split screen",
+    "defaultLabel": "Split {{number}}",
+    "splitRight": "Split right",
+    "splitDown": "Split down",
+    "addToSplit": "Add to {{split}}",
+    "paneEmptyItem": "Pane {{index}}: empty",
+    "paneItem": "Pane {{index}}: {{label}}",
+    "paneNumber": "Pane {{index}}",
+    "newPaneRight": "New pane on the right",
+    "newPaneBelow": "New pane below",
+    "emptyTitle": "Empty pane",
+    "emptyHint": "Pick something to show here. While this pane is selected, anything you open from the sidebar also opens here.",
+    "openTabs": "Open tabs",
+    "noOpenTabs": "No other tabs are open",
+    "hosts": "Hosts",
+    "searchHosts": "Search hosts",
+    "noHosts": "No hosts match",
+    "newSession": "New",
+    "closePane": "Close pane",
+    "closeSession": "Close session",
+    "moveToTab": "Move to its own tab",
+    "swapWith": "Swap with",
+    "showHere": "Show in this pane",
+    "clearPane": "Empty this pane",
+    "zoom": "Zoom pane",
+    "unzoom": "Restore layout",
+    "unsplit": "Unsplit",
+    "layouts": "Layouts",
+    "applyLayout": "Change layout",
+    "newSplit": "New split",
+    "maxPanes": "A split can hold up to {{count}} panes",
+    "dropSplit": "Drop to split",
+    "dropHere": "Drop to show here",
+    "paneActions": "Pane actions",
+    "dividerHint": "Drag to resize. Double-click to even out.",
+    "openInSplit": "Open in split",
+    "openInNewSplit": "New split with the current tab",
+    "shortcuts": "Shortcuts",
+    "shortcutNavigate": "Move between panes",
+    "presets": {
+      "columns2": "Two side by side",
+      "rows2": "Two stacked",
+      "columns3": "Three side by side",
+      "mainLeft3": "One left, two right",
+      "mainBottom3": "Two top, one bottom",
+      "grid4": "Grid of four",
+      "grid5": "Three over two",
+      "grid6": "Grid of six"
+    }
   },
   "connections": {
     "noConnections": "No connections",
@@ -1101,12 +1145,7 @@
     "connectionLogEmpty": "No connection logs yet",
     "connectionLogWaiting": "Waiting for connection logs...",
     "connectionLogCopied": "Connection logs copied to clipboard",
-    "connectionLogCopyFailed": "Failed to copy logs to clipboard",
-    "split": {
-      "splitTab": "Split Tab",
-      "addToSplit": "Add to Split",
-      "removeFromSplit": "Remove from Split"
-    }
+    "connectionLogCopyFailed": "Failed to copy logs to clipboard"
   },
   "transfer": {
     "copyToHost": "Copy to host…",
@@ -1807,31 +1846,6 @@
         "enableRightClickCopyPaste": "Enable right-click copy/paste",
         "copyOnSelect": "Copy selected text automatically"
       },
-      "splitScreen": {
-        "layoutTitle": "Layout",
-        "selectLayoutAbove": "Select a layout above",
-        "selectLayoutHint": "Choose how many panes to display",
-        "panesTitle": "Panes",
-        "openTabsTitle": "Open Tabs",
-        "dragTabsHint": "Drag tabs into panes above, or use Quick Assign",
-        "dropHere": "Drop here",
-        "emptyPane": "Empty",
-        "dashboard": "Dashboard",
-        "clearSplitScreen": "Clear Split Screen",
-        "quickAssign": "Quick Assign",
-        "alreadyAssigned": "Pane {{index}}",
-        "splitTab": "Split Tab",
-        "addToSplit": "Add to Split",
-        "removeFromSplit": "Remove from Split",
-        "assignToPane": "Assign to pane",
-        "hotkeysTitle": "Keyboard Shortcuts",
-        "hotkeysSplitRight": "Toggle 2-way split",
-        "hotkeysSplitBelow": "Toggle 3-way split",
-        "hotkeysNavigatePane": "Navigate panes",
-        "hotkeysNextTab": "Next tab",
-        "hotkeysPrevTab": "Previous tab",
-        "hotkeysJumpTab": "Jump to tab"
-      },
       "snippets": {
         "title": "Snippets",
         "createSnippetTitle": "Create Snippet",