diff --git a/src/components/biz/ai-translate-modal.tsx b/src/components/biz/ai-translate-modal.tsx
index bf2b389..8dd2f06 100644
--- a/src/components/biz/ai-translate-modal.tsx
+++ b/src/components/biz/ai-translate-modal.tsx
@@ -15,10 +15,11 @@ type Props = {
   onOpenChange: (next: boolean) => void;
   languages: string[];
   path: string;
+  prompt: string | undefined;
   onConfirm: (result: Record<string, string>) => Promise<void> | void;
 };
 
-function AiTranslateModalImpl({ open, onOpenChange, languages, path, onConfirm }: Props) {
+function AiTranslateModalImpl({ open, onOpenChange, languages, path, prompt, onConfirm }: Props) {
   const [text, setText] = useState("");
   const [loading, setLoading] = useState(false);
   const [error, setError] = useState<string | null>(null);
@@ -37,7 +38,7 @@ function AiTranslateModalImpl({ open, onOpenChange, languages, path, onConfirm }
     setLoading(true);
     setError(null);
     try {
-      const result = await requestTranslations({ text: payload, languages });
+      const result = await requestTranslations({ text: payload, languages, prompt });
       // 二次校验 keys 完整性
       for (const l of languages) {
         if (!Object.prototype.hasOwnProperty.call(result, l)) {
diff --git a/src/components/biz/project-settings-modal.tsx b/src/components/biz/project-settings-modal.tsx
new file mode 100644
index 0000000..01e684e
--- /dev/null
+++ b/src/components/biz/project-settings-modal.tsx
@@ -0,0 +1,95 @@
+import { memo, useEffect, useState } from "react";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import { Dialog, DialogContent, DialogFooter, DialogHeader, DialogTitle } from "@/components/ui/dialog";
+import type { Project } from "@/lib/db";
+
+type Props = {
+  open: boolean;
+  onOpenChange: (v: boolean) => void;
+  project: Project | null;
+  onSave: (update: { name: string; preferences: { aiPrompt?: string } }) => Promise<void> | void;
+  onDelete: () => Promise<void> | void;
+};
+
+function ProjectSettingsModalImpl({ open, onOpenChange, project, onSave, onDelete }: Props) {
+  const [name, setName] = useState("");
+  const [aiPrompt, setAiPrompt] = useState<string>("");
+  const [saving, setSaving] = useState(false);
+  const [err, setErr] = useState<string | null>(null);
+
+  useEffect(() => {
+    if (open) {
+      setName(project?.name ?? "");
+      setAiPrompt(project?.preferences?.aiPrompt ?? "");
+      setSaving(false);
+      setErr(null);
+    }
+  }, [open, project]);
+
+  async function handleSubmit(e: React.FormEvent) {
+    e.preventDefault();
+    const trimmed = name.trim();
+    if (!trimmed) return setErr("项目名称不能为空");
+    setSaving(true);
+    try {
+      await onSave({
+        name: trimmed,
+        preferences: { aiPrompt },
+      });
+      onOpenChange(false);
+    } catch (e) {
+      setErr((e as Error)?.message ?? "保存失败");
+    } finally {
+      setSaving(false);
+    }
+  }
+
+  async function handleDelete() {
+    if (!confirm("确认删除整个项目？该操作不可恢复！")) return;
+    setSaving(true);
+    try {
+      await onDelete();
+      onOpenChange(false);
+    } catch (e) {
+      setErr((e as Error)?.message ?? "删除失败");
+    } finally {
+      setSaving(false);
+    }
+  }
+
+  return (
+    <Dialog open={open} onOpenChange={(v) => { if (!saving) onOpenChange(v); }}>
+      <DialogContent className="max-w-lg">
+        <DialogHeader>
+          <DialogTitle>项目设置</DialogTitle>
+        </DialogHeader>
+        <form onSubmit={handleSubmit} className="space-y-4">
+          <div>
+            <label className="block text-sm text-muted-foreground">项目名称</label>
+            <Input value={name} onChange={(e) => setName(e.target.value)} placeholder="输入项目名称" />
+          </div>
+          <div>
+            <label className="block text-sm text-muted-foreground">翻译偏好设置（AI Prompt）</label>
+            <textarea
+              className="mt-1 w-full min-h-32 rounded-md border border-input bg-transparent px-3 py-2 text-sm outline-none font-mono"
+              placeholder="请输入提供给 AI 的提示词（Prompt），描述风格、用词偏好、命名规则等..."
+              value={aiPrompt}
+              onChange={(e) => setAiPrompt(e.target.value)}
+            />
+          </div>
+          {err && <div className="text-sm text-red-600">{err}</div>}
+          <DialogFooter>
+            <Button className="mr-auto" variant="destructive" onClick={handleDelete} disabled={saving}>删除项目</Button>
+            <Button type="button" variant="outline" onClick={() => onOpenChange(false)} disabled={saving}>取消</Button>
+            <Button type="submit" disabled={saving}>保存</Button>
+          </DialogFooter>
+        </form>
+      </DialogContent>
+    </Dialog>
+  );
+}
+
+export const ProjectSettingsModal = memo(ProjectSettingsModalImpl);
+
+
diff --git a/src/lib/ai.ts b/src/lib/ai.ts
index 8965394..5e6fcec 100644
--- a/src/lib/ai.ts
+++ b/src/lib/ai.ts
@@ -4,6 +4,7 @@ export type AiTranslateParams = {
   text: string;
   languages: string[];
   model?: string;
+  prompt?: string;
 };
 
 function getClient() {
@@ -20,6 +21,7 @@ export async function requestTranslations({
   text,
   languages,
   model,
+  prompt,
 }: AiTranslateParams): Promise<Record<string, string>> {
   const client = getClient();
   const mdl =
@@ -32,6 +34,8 @@ export async function requestTranslations({
   const instruction = [
     "你是一个专业的翻译助手。",
     `请将用户输入的文本翻译为这些目标语言：${targetList}，注意英语的首字母务必是大写。`,
+    "翻译偏好：",
+    prompt,
     "严格要求：",
     "- 仅返回一个 JSON 对象，不包含任何其他内容（例如说明、代码块标记、注释）。",
     "- JSON 的键必须严格等于目标语言代码，值为对应翻译的纯文本字符串。",
@@ -39,11 +43,11 @@ export async function requestTranslations({
     '示例：{"en":"Cat","zh-Hans":"猫"}',
   ].join("\n");
 
-  const prompt = [instruction, "\n用户文本：\n" + text].join("\n\n");
+  const promptResult = [instruction, "\n用户文本：\n" + text].join("\n\n");
 
   const response = await client.responses.create({
     model: mdl,
-    input: prompt,
+    input: promptResult,
     response_format: { type: "json_object" },
   } as any);
 
diff --git a/src/lib/db.ts b/src/lib/db.ts
index ed4caf0..e6235a5 100644
--- a/src/lib/db.ts
+++ b/src/lib/db.ts
@@ -3,6 +3,9 @@ export type Project = {
   name: string;
   createdAt: number; // ms timestamp
   updatedAt: number; // ms timestamp
+  preferences?: {
+    aiPrompt?: string;
+  };
 };
 
 export type StructureNode = {
@@ -143,23 +146,6 @@ export async function createProject(name: string): Promise<Project> {
   }
 }
 
-export async function deleteProject(id: string): Promise<void> {
-  const db = await openDb();
-  try {
-    const tx = db.transaction(STORE_PROJECTS, "readwrite");
-    const store = tx.objectStore(STORE_PROJECTS);
-    const delReq = store.delete(id);
-    await promisifyRequest(delReq);
-    await new Promise<void>((resolve, reject) => {
-      tx.oncomplete = () => resolve();
-      tx.onerror = () => reject(tx.error);
-      tx.onabort = () => reject(tx.error);
-    });
-  } finally {
-    db.close();
-  }
-}
-
 // ----- Structures -----
 export async function getStructure(projectId: string): Promise<ProjectStructure | undefined> {
   const db = await openDb();
@@ -251,6 +237,72 @@ export async function listLanguages(projectId: string): Promise<string[]> {
   }
 }
 
+export async function updateProject(update: Partial<Project> & { id: string }): Promise<Project> {
+  const db = await openDb();
+  try {
+    // read existing
+    const readTx = db.transaction(STORE_PROJECTS, "readonly");
+    const readStore = readTx.objectStore(STORE_PROJECTS);
+    const getReq = readStore.get(update.id);
+    const existing = await promisifyRequest<Project | undefined>(getReq as IDBRequest<Project | undefined>);
+    await new Promise<void>((resolve, reject) => {
+      readTx.oncomplete = () => resolve();
+      readTx.onerror = () => reject(readTx.error);
+      readTx.onabort = () => reject(readTx.error);
+    });
+    if (!existing) throw new Error("项目不存在");
+
+    const merged: Project = {
+      ...existing,
+      ...update,
+      preferences: { ...(existing.preferences ?? {}), ...(update.preferences ?? {}) },
+      updatedAt: Date.now(),
+    };
+
+    const writeTx = db.transaction(STORE_PROJECTS, "readwrite");
+    const writeStore = writeTx.objectStore(STORE_PROJECTS);
+    await promisifyRequest(writeStore.put(merged));
+    await new Promise<void>((resolve, reject) => {
+      writeTx.oncomplete = () => resolve();
+      writeTx.onerror = () => reject(writeTx.error);
+      writeTx.onabort = () => reject(writeTx.error);
+    });
+    return merged;
+  } finally {
+    db.close();
+  }
+}
+
+export async function deleteProjectDeep(projectId: string): Promise<void> {
+  const db = await openDb();
+  try {
+    const tx = db.transaction([STORE_PROJECTS, STORE_STRUCTURES, STORE_TRANSLATIONS], "readwrite");
+    const projectsStore = tx.objectStore(STORE_PROJECTS);
+    const structuresStore = tx.objectStore(STORE_STRUCTURES);
+    const translationsStore = tx.objectStore(STORE_TRANSLATIONS);
+
+    // delete project
+    await promisifyRequest(projectsStore.delete(projectId));
+    // delete structure
+    await promisifyRequest(structuresStore.delete(projectId));
+    // delete translations for project
+    const index = translationsStore.index("byProject");
+    const getAllReq = index.getAll(IDBKeyRange.only(projectId));
+    const records = await promisifyRequest<ProjectLanguageTranslations[]>(getAllReq as IDBRequest<ProjectLanguageTranslations[]>);
+    for (const rec of records) {
+      await promisifyRequest(translationsStore.delete(rec.id));
+    }
+
+    await new Promise<void>((resolve, reject) => {
+      tx.oncomplete = () => resolve();
+      tx.onerror = () => reject(tx.error);
+      tx.onabort = () => reject(tx.error);
+    });
+  } finally {
+    db.close();
+  }
+}
+
 export async function getAllLanguageTranslations(projectId: string): Promise<ProjectLanguageTranslations[]> {
   const db = await openDb();
   try {
@@ -280,7 +332,8 @@ export async function deleteEntryFromAllLanguages(projectId: string, path: strin
     const records = await promisifyRequest<ProjectLanguageTranslations[]>(allReq as IDBRequest<ProjectLanguageTranslations[]>);
     for (const rec of records) {
       if (rec.values && Object.prototype.hasOwnProperty.call(rec.values, path)) {
-        const { [path]: _, ...rest } = rec.values;
+        const rest = { ...rec.values } as Record<string, string>;
+        delete rest[path];
         rec.values = rest;
         await promisifyRequest(store.put(rec));
       }
diff --git a/src/pages/editor.tsx b/src/pages/editor.tsx
index 7beba1e..e3e04ae 100644
--- a/src/pages/editor.tsx
+++ b/src/pages/editor.tsx
@@ -1,6 +1,6 @@
 import { useCallback, useEffect, useMemo, useRef, useState } from "react";
 import type React from "react";
-import { Link, useParams } from "react-router";
+import { Link, useParams, useNavigate } from "react-router";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
 import {
@@ -14,6 +14,8 @@ import {
   upsertStructure,
   deleteEntryFromAllLanguages,
   renameEntryInAllLanguages,
+  updateProject,
+  deleteProjectDeep,
 } from "@/lib/db";
 import { ArrowBigDownDash, ArrowBigUpDash, ArrowLeft, Brackets, CaseSensitive, Languages, LocateFixed, MoreVertical, PencilLine, Trash2 } from "lucide-react";
 import { useTranslationInlineEdit } from "@/hooks/biz/use-translation-inline-edit";
@@ -21,6 +23,7 @@ import { flattenEntries, type FlatEntry, insertEntrySibling, removeEntryAtPath,
 import { ImportLanguageModal } from "@/components/biz/import-language-modal";
 import { ExportLanguageModal } from "@/components/biz/export-language-modal";
 import { EntryNameModal } from "@/components/biz/entry-name-modal";
+import { ProjectSettingsModal } from "@/components/biz/project-settings-modal";
 import { AiTranslateModal } from "@/components/biz/ai-translate-modal";
 import { TableVirtuoso, type TableVirtuosoHandle } from "react-virtuoso";
 import {
@@ -35,6 +38,7 @@ import { toast } from "sonner";
 
 export default function Editor() {
   const { id: projectId } = useParams();
+  const navigate = useNavigate();
   const [project, setProject] = useState<Project | null>(null);
   const [structure, setStructure] = useState<ProjectStructure | null>(null);
   const [languages, setLanguages] = useState<string[]>([]);
@@ -50,6 +54,7 @@ export default function Editor() {
   const [caseSensitive, setCaseSensitive] = useState(false);
   const [fullMatch, setFullMatch] = useState(false);
   const [aiModal, setAiModal] = useState<{ open: boolean; path: string } | null>(null);
+  const [settingsOpen, setSettingsOpen] = useState(false);
 
   const { copy } = useClipboard();
 
@@ -250,7 +255,7 @@ export default function Editor() {
         </td>
       </>
     );
-  }, [languages, colWidth, inline, projectId, structure, setStructure, setValuesByLang]);
+  }, [languages, colWidth, inline, projectId, structure, setStructure, setValuesByLang, copy]);
 
   useEffect(() => {
     if (!projectId || languages.length === 0) return;
@@ -291,6 +296,9 @@ export default function Editor() {
             {languages.length > 0 && (
               <Button variant="outline" onClick={() => setExportOpen(true)}>导出 JSON</Button>
             )}
+            {project && (
+              <Button variant="outline" onClick={() => setSettingsOpen(true)}>项目设置</Button>
+            )}
           </div>
         </div>
       </header>
@@ -367,11 +375,28 @@ export default function Editor() {
         orderedPaths={entries.map((e) => e.path)}
       />
 
+      <ProjectSettingsModal
+        open={settingsOpen}
+        onOpenChange={setSettingsOpen}
+        project={project}
+        onSave={async (update) => {
+          if (!projectId) return;
+          const next = await updateProject({ id: projectId, name: update.name, preferences: update.preferences });
+          setProject(next);
+        }}
+        onDelete={async () => {
+          if (!projectId) return;
+          await deleteProjectDeep(projectId);
+          navigate("/");
+        }}
+      />
+
       <AiTranslateModal
         open={!!aiModal?.open}
         onOpenChange={(v) => setAiModal((cur) => (cur ? { ...cur, open: v } : cur))}
         languages={languages}
         path={aiModal?.path ?? ""}
+        prompt={project?.preferences?.aiPrompt}
         onConfirm={async (translations) => {
           if (!projectId || !aiModal) return;
           const targetPath = aiModal.path;
diff --git a/src/pages/home.tsx b/src/pages/home.tsx
index 10e7f71..a92fc4c 100644
--- a/src/pages/home.tsx
+++ b/src/pages/home.tsx
@@ -1,8 +1,10 @@
 import { useEffect, useMemo, useState } from "react";
-import { Link } from "react-router";
+import { useNavigate } from "react-router";
 import { Input } from "@/components/ui/input";
 import { Button } from "@/components/ui/button";
-import { createProject, deleteProject, listProjects, type Project } from "@/lib/db";
+import { createProject, deleteProjectDeep, listProjects, type Project, updateProject } from "@/lib/db";
+import { ProjectSettingsModal } from "@/components/biz/project-settings-modal";
+import { Settings } from "lucide-react";
 
 function formatTime(ts: number) {
   try {
@@ -18,6 +20,9 @@ function App() {
   const [loading, setLoading] = useState(true);
   const [projects, setProjects] = useState<Project[]>([]);
   const [error, setError] = useState<string | null>(null);
+  const [settingsOpen, setSettingsOpen] = useState(false);
+  const [currentProject, setCurrentProject] = useState<Project | null>(null);
+  const navigate = useNavigate();
 
   async function refresh() {
     setLoading(true);
@@ -53,20 +58,9 @@ function App() {
     }
   }
 
-  async function onDelete(id: string) {
-    // 简单确认，避免误删
-    if (!confirm("确认删除该项目？此操作不可恢复")) return;
-    try {
-      await deleteProject(id);
-      await refresh();
-    } catch (e) {
-      setError((e as Error)?.message ?? "删除失败");
-    }
-  }
-
   return (
-    <div className="mx-auto max-w-3xl px-4 py-8">
-      <h1 className="text-2xl font-semibold">翻译项目</h1>
+    <div className="mx-auto max-w-5xl px-4 py-8">
+      <h1 className="text-2xl font-semibold">翻译它！</h1>
 
       <form onSubmit={onCreate} className="mt-6 flex items-center gap-3">
         <Input
@@ -93,31 +87,62 @@ function App() {
         ) : projects.length === 0 ? (
           <div className="text-sm text-muted-foreground">暂无项目，创建一个开始吧。</div>
         ) : (
-          <ul className="space-y-3">
+          <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
             {projects.map((p) => (
-              <li
+              <div
                 key={p.id}
-                className="flex items-center justify-between rounded-md border px-4 py-3"
+                className="rounded-md border p-4 hover:shadow-sm transition cursor-pointer relative"
+                onClick={() => navigate(`/editor/${p.id}`)}
+                role="button"
+                tabIndex={0}
+                onKeyDown={(e) => {
+                  if (e.key === "Enter" || e.key === " ") navigate(`/editor/${p.id}`);
+                }}
               >
-                <div className="min-w-0">
-                  <div className="truncate font-medium">{p.name}</div>
-                  <div className="mt-1 text-xs text-muted-foreground truncate">
-                    ID: {p.id} · 创建时间: {formatTime(p.createdAt)}
+                <button
+                  type="button"
+                  aria-label="项目设置"
+                  className="absolute top-2 right-2 inline-flex items-center justify-center rounded-md border px-2 py-1 text-xs text-muted-foreground hover:bg-accent"
+                  onClick={(e) => {
+                    e.stopPropagation();
+                    setCurrentProject(p);
+                    setSettingsOpen(true);
+                  }}
+                >
+                  <Settings className="size-4" />
+                </button>
+                <div className="truncate font-medium pr-8">{p.name}</div>
+                <div className="mt-1 text-xs text-muted-foreground truncate">ID: {p.id}</div>
+                <div className="mt-1 text-xs text-muted-foreground">创建时间: {formatTime(p.createdAt)}</div>
+                {p.preferences?.aiPrompt ? (
+                  <div className="mt-3 text-xs line-clamp-3 text-muted-foreground">
+                    偏好：{p.preferences.aiPrompt}
                   </div>
-                </div>
-                <div className="flex items-center gap-2 shrink-0">
-                  <Button asChild size="sm" variant="outline">
-                    <Link to={`/editor/${p.id}`}>打开</Link>
-                  </Button>
-                  <Button size="sm" variant="destructive" onClick={() => onDelete(p.id)}>
-                    删除
-                  </Button>
-                </div>
-              </li>
+                ) : null}
+              </div>
             ))}
-          </ul>
+          </div>
         )}
       </div>
+
+      <ProjectSettingsModal
+        open={settingsOpen}
+        onOpenChange={setSettingsOpen}
+        project={currentProject}
+        onSave={async (update) => {
+          if (!currentProject) return;
+          const next = await updateProject({ id: currentProject.id, name: update.name, preferences: update.preferences });
+          setProjects((arr) => arr.map((it) => (it.id === next.id ? next : it)));
+          setCurrentProject(next);
+        }}
+        onDelete={async () => {
+          if (!currentProject) return;
+          await deleteProjectDeep(currentProject.id);
+          setSettingsOpen(false);
+          setCurrentProject(null);
+          await refresh();
+        }}
+      />
     </div>
   );
 }