refactor(gui): copy-free settings shell; ui-settings-general owns ownerless copy

The shell is now a pure composition face: no dictionaries, no locale
dependency, and three new chrome content seats (settings.trigger /
settings.header / settings.close) whose slot content also carries the
accessible names (trigger text, dialog aria-labelledby, visually hidden
close label). ui-settings-general returns as the owner of copy that
belongs to no single feature: chrome content, the General section with
its item slot, and the settings dictionaries. Slot types split homes —
trigger/header/close/section live in the shell contract; the
settings.general.item entry moves to the locale package (the common
dependency of every item registrant), with ui-theme consuming it
through a re-export seam; the verbatim duplicate merges are gone and
the dependency graph is a clean DAG.

pnpm-lock.yaml

@@ -149,6 +149,9 @@ importers:
       '@deepseek-ai/dsh-client-ui-settings':
         specifier: workspace:^
         version: link:../../packages/client/ui-settings
+      '@deepseek-ai/dsh-client-ui-settings-general':
+        specifier: workspace:^
+        version: link:../../packages/client/ui-settings-general
       '@deepseek-ai/dsh-client-ui-sidebar':
         specifier: workspace:^
         version: link:../../packages/client/ui-sidebar
@@ -993,9 +996,6 @@ importers:
         specifier: ^2.0.0
         version: 2.1.1
     devDependencies:
-      '@deepseek-ai/dsh-client-locale':
-        specifier: workspace:^
-        version: link:../locale
       '@deepseek-ai/dsh-client-runtime':
         specifier: workspace:^
         version: link:../runtime
@@ -1021,6 +1021,36 @@ importers:
         specifier: ^18.2.0
         version: 18.3.1
 
+  packages/client/ui-settings-general:
+    devDependencies:
+      '@deepseek-ai/dsh-client-locale':
+        specifier: workspace:^
+        version: link:../locale
+      '@deepseek-ai/dsh-client-runtime':
+        specifier: workspace:^
+        version: link:../runtime
+      '@deepseek-ai/dsh-client-ui-primitives':
+        specifier: workspace:^
+        version: link:../ui-primitives
+      '@deepseek-ai/dsh-client-ui-settings':
+        specifier: workspace:^
+        version: link:../ui-settings
+      '@deepseek-ai/dsh-client-ui-slots':
+        specifier: workspace:^
+        version: link:../ui-slots
+      '@deepseek-ai/dsh-invariants':
+        specifier: workspace:^
+        version: link:../../support/invariants
+      '@types/react':
+        specifier: ~18.3.1
+        version: 18.3.31
+      cordis:
+        specifier: ^4.0.0-rc.7
+        version: 4.0.0-rc.7(@cordisjs/plugin-include@1.0.4)(@cordisjs/plugin-loader@1.0.0-rc.5)
+      react:
+        specifier: ^18.2.0
+        version: 18.3.1
+
   packages/client/ui-sidebar:
     dependencies:
       clsx: