feat(workspace,settings): model menu chip in the composer, compact settings panels

The workspace home's composer takes ONE Model chip (ModelMenu: model list
plus Effort) and moves AI Router / Permission / Local-New worktree into the
row under it; Settings drops the General-page cost card and export row,
PricingSettings and the empty states are compacted for settings panels.

client/src/i18n/locales/en/run.json

@@ -72,6 +72,12 @@
     "cwdPlaceholder": "Type to search or paste an absolute path…",
     "effort": "Thinking effort",
     "model": "Model",
+    "moreModels": "More models",
+    "effortDefault": "Default",
+    "effortFaster": "Faster",
+    "effortSmarter": "Smarter",
+    "effortReset": "Back to the model's default",
+    "effortDefaultHint": "The model decides — no --effort flag",
     "modelCustom": "Custom…",
     "modelCustomPlaceholder": "model id (e.g. claude-opus-5)",
     "modelInheritLabel": "Inherit from settings",