fix: resolve remaining QA issues -- editor features, masking, persistence, Playwright tests

Phase 1 quick fixes:
- Add isInputFocused() guard to Cmd+A/D/T/J shortcuts (P1-7)
- Add Go Home button to tool-not-found page (P2-30)
- Fix hardcoded "Import from Library" string in file library modal (P2-28)
- Fix TeamEntry.id type from number to string to match API (P2-6)
- Add eye toggle to confirm password field (P2-10)
- Add Apply/Cancel buttons to Free Transform options bar (P2-14)

Phase 2 state fixes:
- Add sessionStorage persistence to pipeline store (P1-26)
- Fix Free Transform 0 dimensions by falling back to selection bounds (P1-6)

Phase 3 editor features:
- Constrain brush/eraser drawing within active selection bounds (P1-5)
- Add feather radius control to selection options (P2-21)
- Add flow control slider to brush options (P2-22)
- Add brush/block mode selector to eraser options (P2-23)
- Add estimated file size display to export dialog (P2-18)

Phase 4:
- Add Playwright e2e tests for key fixes (404 page, routing, pipeline persistence, export dialog)

packages/shared/src/i18n/zh-CN.ts

@@ -37,9 +37,8 @@ export const zhCN: TranslationKeys = {
     retry: "重试",
     privacyPolicy: "隐私政策",
     pageNotFound: "Page not found",
-    pageNotFoundDescription: "The page you are looking for does not exist or has been moved.",
-    noToolsFound: "No tools found",
-  },
+  pageNotFoundDescription: "The page you are looking for does not exist or has been moved.",
+},
   categories: {
     essentials: "基础工具",
     optimization: "优化",
@@ -540,6 +539,13 @@ export const zhCN: TranslationKeys = {
       intensity: "强度",
       addShadow: "添加阴影",
       opacity: "不透明度",
+      outputFormat: "Output Format",
+      edgeSmoothing: "Edge Smoothing",
+      edgeSmoothingOff: "Off",
+      edgeSmoothingLight: "Light",
+      edgeSmoothingMedium: "Medium",
+      edgeSmoothingStrong: "Strong",
+      colorDecontamination: "Color Decontamination",
       rendering: "渲染中...",
       submit: "移除背景",
       submitBatch: "移除背景（{count} 个文件）",
@@ -1623,7 +1629,8 @@ export const zhCN: TranslationKeys = {
       docsLink: "文档",
       apiRefLink: "API 参考（Swagger）",
       licenseLabel: "License:",
-      licenseDescription: "Dual-licensed under AGPLv3 and a commercial license.",
+      licenseDescription:
+        "SnapOtter is open-source software licensed under the GNU Affero General Public License v3 (AGPLv3).",
     },
   },
   auth: {
@@ -1763,9 +1770,9 @@ export const zhCN: TranslationKeys = {
     pipelineName: "Pipeline 名称",
     pipelineDescription: "描述（可选）",
     noStepsPrompt: "添加步骤来构建自动化流程",
-    noStepsHeading: "No steps yet",
+        noStepsHeading: "No steps yet",
     searchToolsPlaceholder: "Search tools...",
-    step: "步骤",
+step: "步骤",
   },
   nav: {
     tools: "工具",
@@ -1778,11 +1785,11 @@ export const zhCN: TranslationKeys = {
     grid: "网格",
   },
   files: {
-    recentTab: "最近",
-    uploadTab: "上传",
-    fileDetailsAriaLabel: "文件详情",
-    fileDetailsHeading: "文件详情",
     myFiles: "My Files",
+    recentTab: "Recent",
+    uploadTab: "Upload Files",
+    fileDetailsAriaLabel: "File Details",
+    fileDetailsHeading: "File Details",
     searchPlaceholder: "Search files...",
     selectedCount: "{count} selected",
     fileCount: "{count} files",