fix: 修正 logo 中 N 和 G 字母造型

N 添加对角线笔画（█▄ █），G 添加内横杠（█ ▀█），
避免与 O 字母造型雷同。同步更新 ui.ts 中的硬编码 wordmark。

packages/storybook/.storybook/mocks/app/context/language.ts

@@ -0,0 +1,75 @@
+const dict: Record<string, string> = {
+  "session.todo.title": "Todos",
+  "session.todo.collapse": "Collapse todos",
+  "session.todo.expand": "Expand todos",
+  "prompt.loading": "Loading prompt...",
+  "prompt.placeholder.normal": "Ask anything...",
+  "prompt.placeholder.simple": "Ask anything...",
+  "prompt.placeholder.shell": "Run a shell command... {{example}}",
+  "prompt.placeholder.summarizeComment": "Summarize this comment",
+  "prompt.placeholder.summarizeComments": "Summarize these comments",
+  "prompt.action.attachFile": "Attach files",
+  "prompt.action.send": "Send",
+  "prompt.action.stop": "Stop",
+  "prompt.attachment.remove": "Remove attachment",
+  "prompt.dropzone.label": "Drop image to attach",
+  "prompt.dropzone.file.label": "Drop file to attach",
+  "prompt.mode.shell": "Shell",
+  "prompt.mode.normal": "Prompt",
+  "dialog.model.select.title": "Select model",
+  "common.default": "Default",
+  "common.key.esc": "Esc",
+  "command.category.file": "File",
+  "command.category.session": "Session",
+  "command.agent.cycle": "Cycle agent",
+  "command.model.choose": "Choose model",
+  "command.model.variant.cycle": "Cycle model variant",
+  "command.prompt.mode.shell": "Switch to shell mode",
+  "command.prompt.mode.normal": "Switch to prompt mode",
+  "command.permissions.autoaccept.enable": "Enable auto-accept",
+  "command.permissions.autoaccept.disable": "Disable auto-accept",
+  "prompt.example.1": "Refactor this function and keep behavior the same",
+  "prompt.example.2": "Find the root cause of this error",
+  "prompt.example.3": "Write tests for this module",
+  "prompt.example.4": "Explain this diff",
+  "prompt.example.5": "Optimize this query",
+  "prompt.example.6": "Clean up this component",
+  "prompt.example.7": "Summarize the recent changes",
+  "prompt.example.8": "Add accessibility checks",
+  "prompt.example.9": "Review this API design",
+  "prompt.example.10": "Generate migration notes",
+  "prompt.example.11": "Patch this bug",
+  "prompt.example.12": "Make this animation smoother",
+  "prompt.example.13": "Improve error handling",
+  "prompt.example.14": "Document this feature",
+  "prompt.example.15": "Refine these styles",
+  "prompt.example.16": "Check edge cases",
+  "prompt.example.17": "Help me write a commit message",
+  "prompt.example.18": "Reduce re-renders in this component",
+  "prompt.example.19": "Verify keyboard navigation",
+  "prompt.example.20": "Make this copy clearer",
+  "prompt.example.21": "Add telemetry for this flow",
+  "prompt.example.22": "Compare these two implementations",
+  "prompt.example.23": "Create a minimal reproduction",
+  "prompt.example.24": "Suggest naming improvements",
+  "prompt.example.25": "What should we test next?",
+}
+
+function render(template: string, params?: Record<string, unknown>) {
+  if (!params) return template
+  return template.replace(/\{\{([^}]+)\}\}/g, (_, key: string) => {
+    const value = params[key.trim()]
+    if (value === undefined || value === null) return ""
+    // oxlint-disable-next-line no-base-to-string -- value is Record<string, unknown>, always coerced intentionally
+    return String(value)
+  })
+}
+
+export function useLanguage() {
+  return {
+    locale: () => "en" as const,
+    t(key: string, params?: Record<string, unknown>) {
+      return render(dict[key] ?? key, params)
+    },
+  }
+}