refactor(settings): remove wrapper layers, dead props and unused dictionary keys

- components/model-selector.tsx uses Dialog, Command and Tooltip
  directly; delete components/ai-elements/model-selector.tsx and
  components/button-with-tooltip.tsx; one renderGroups for both lists;
  no "Server · " prefix round trip
- components/ui: drop CommandDialog, CommandShortcut and six unused
  shadcn exports
- model-config-dialog: no type-to-confirm on provider delete;
  provider-credentials-fields: drop footer and bedrockApiKey
- hooks/use-model-config.ts and lib/types/model-config.ts: remove the
  2025-12 single-provider migration, resetConfig, selectedModel and
  fields nothing reads
- components/chat/TemplateFormDialog.tsx replaces the create and edit
  dialogs; TemplatePanel drops the setInput fallback, the
  templatesChanged listener, dictionary fallbacks and formatLastUsed;
  lib/template-storage.ts drops getTemplate, clickCount and indexes
- reasoning.tsx becomes one component; shimmer uses a CSS keyframe
  (motion and @radix-ui/react-use-controllable-state removed)
- error-toast.tsx deleted in favour of toast.error; ValidationCard
  drops the idle status; dev-xml-simulator uses English literals
- admin: no enum setting type, shared types from lib/admin
  (AdminProviderInput stays exported for that), ENABLE_HISTORY_XML_REPLACE
  entry removed
- app/globals.css: drop check-pop, --ease-spring, --duration-normal
  and the shadow aliases
- dictionaries: 81 unused keys removed from all four languages

tests/unit/template-storage.test.ts

@@ -37,7 +37,6 @@ describe("sortTemplates", () => {
         prompt: "test prompt",
         createdAt: 1000,
         updatedAt: 1000,
-        clickCount: 0,
         runCount: 0,
         lastUsedAt: 0,
         pinned: false,
@@ -115,7 +114,6 @@ describe("searchTemplates", () => {
             description: "Basic flowchart template",
             createdAt: 1000,
             updatedAt: 1000,
-            clickCount: 0,
             runCount: 0,
             lastUsedAt: 0,
             pinned: false,
@@ -127,7 +125,6 @@ describe("searchTemplates", () => {
             description: "Entity relationship diagram",
             createdAt: 1000,
             updatedAt: 1000,
-            clickCount: 0,
             runCount: 0,
             lastUsedAt: 0,
             pinned: false,
@@ -138,7 +135,6 @@ describe("searchTemplates", () => {
             prompt: "Draw network topology",
             createdAt: 1000,
             updatedAt: 1000,
-            clickCount: 0,
             runCount: 0,
             lastUsedAt: 0,
             pinned: false,
@@ -236,7 +232,6 @@ describe("validateImportData", () => {
                     prompt: "test prompt",
                     createdAt: Date.now(),
                     updatedAt: Date.now(),
-                    clickCount: 0,
                     runCount: 0,
                     lastUsedAt: 0,
                     pinned: false,