diff --git a/src/app/(app)/posts/PostDetailPageClient.tsx b/src/app/(app)/posts/PostDetailPageClient.tsx
index 96ad0ee..4b5d641 100644
--- a/src/app/(app)/posts/PostDetailPageClient.tsx
+++ b/src/app/(app)/posts/PostDetailPageClient.tsx
@@ -7,7 +7,6 @@ import { useParams, useRouter, useSearchParams } from "next/navigation";
 import { Trash2, ArrowLeft, Pencil, Heart, Bookmark, UserPlus, UserMinus } from "lucide-react";
 import ReactMarkdown from "react-markdown";
 import remarkGfm from "remark-gfm";
-import rehypeSanitize from "rehype-sanitize";
 import { api, type Post } from "@/lib/api";
 import { useAuth } from "@/contexts/AuthContext";
 import { Badge } from "@/components/ui/badge";
@@ -16,7 +15,7 @@ import { Card, CardContent } from "@/components/ui/card";
 import { CommentSection } from "@/components/post/CommentSection";
 import { ReportButton } from "@/components/moderation/ReportButton";
 import { useToast } from "@/components/ui/toast-context";
-import { TAG_LABEL, parsePostTags } from "@/lib/post-tags";
+import { POST_SECTION_LABEL } from "@/lib/enums";
 import { relativeTime } from "@/lib/utils";
 import { getQueryRoute, toQueryRoute } from "@/lib/query-routing";
 
@@ -61,7 +60,6 @@ function PostDetailInner() {
   const rejected = post.status === "REJECTED";
   const hidden = post.status === "HIDDEN";
   const draft = post.status === "DRAFT";
-  const tags = parsePostTags(post.tags);
 
   async function remove() {
     if (!id) return;
@@ -182,17 +180,11 @@ function PostDetailInner() {
       ) : null}
 
       <article className="space-y-4">
-        <div className="flex flex-wrap items-center gap-2 text-xs">
-          {tags.length > 0 ? (
-            tags.map((t) => (
-              <Badge key={t} variant="pink">
-                {TAG_LABEL[t] ?? t}
-              </Badge>
-            ))
-          ) : (
-            <Badge variant="outline">动态</Badge>
-          )}
-          {post.section === "MEDICAL" && post.hospital ? (
+        <div className="flex items-center gap-2 flex-wrap">
+            <Badge variant="pink" className="shrink-0">
+              {POST_SECTION_LABEL[post.section as keyof typeof POST_SECTION_LABEL] ?? "动态"}
+            </Badge>
+            {post.section === "MEDICAL" && post.hospital ? (
             <Badge variant="outline">{post.hospital}</Badge>
           ) : null}
         </div>
@@ -221,7 +213,18 @@ function PostDetailInner() {
           ) : null}
         </div>
         <div className="prose-trans text-base leading-relaxed">
-          <ReactMarkdown remarkPlugins={[remarkGfm]} rehypePlugins={[rehypeSanitize]}>
+          <ReactMarkdown remarkPlugins={[remarkGfm]} components={{
+              img: ({ src, alt }) => {
+                if (!src) return null;
+                const resolved = src.startsWith("/api/files/") ? api.files.url(src) : src;
+                return <img src={resolved} alt={alt || ''} style={{maxWidth:'100%',height:'auto',borderRadius:'8px',margin:'12px 0'}} />;
+              },
+              a: ({ href, children, ...props }) => {
+                if (!href) return <a {...props}>{children}</a>;
+                const resolved = href.startsWith("/api/files/") ? api.files.url(href) : href;
+                return <a href={resolved} target="_blank" rel="noopener noreferrer" {...props}>{children}</a>;
+              }
+            }}>
             {post.body}
           </ReactMarkdown>
         </div>
diff --git a/src/app/(app)/posts/new/page.tsx b/src/app/(app)/posts/new/page.tsx
index 96e803c..2651a17 100644
--- a/src/app/(app)/posts/new/page.tsx
+++ b/src/app/(app)/posts/new/page.tsx
@@ -32,7 +32,7 @@ function NewPostInner() {
       <PageHeader
         eyebrow="发帖"
         title="发布到广场"
-        description="选择板块,正文支持 Markdown。提交后内容会经过 AI 审核;违规会被退回,边界内容会进入人工复核。"
+        description="用户自选板块,正文支持 Markdown。提交后内容会经过 AI 审核;违规会被退回,边界内容会进入人工复核。"
       />
       <PostForm mode="create" />
     </div>
diff --git a/src/components/post/PostCard.tsx b/src/components/post/PostCard.tsx
index 7c5516a..2088224 100644
--- a/src/components/post/PostCard.tsx
+++ b/src/components/post/PostCard.tsx
@@ -5,7 +5,7 @@ import { MessageCircle, Heart } from "lucide-react";
 import type { Post } from "@/lib/api";
 import { relativeTime } from "@/lib/utils";
 import { toQueryRoute } from "@/lib/query-routing";
-import { TAG_LABEL, parsePostTags } from "@/lib/post-tags";
+import { POST_SECTION_LABEL } from "@/lib/enums";
 
 type CardPost = Post & { like_count?: number };
 
@@ -14,7 +14,6 @@ export function PostCard({ post }: { post: CardPost }) {
   const isHidden = post.status === "HIDDEN";
   const isRejected = post.status === "REJECTED";
   const isDraft = post.status === "DRAFT";
-  const tags = parsePostTags(post.tags);
   // The list endpoint exposes `like_count` (snake_case); the detail endpoint
   // exposes `likeCount` (camelCase). Read both so the card works in either
   // context (list views, bookmarks, drafts).
@@ -25,15 +24,9 @@ export function PostCard({ post }: { post: CardPost }) {
       <Card className="h-full transition-all group-hover:shadow-lift group-hover:-translate-y-0.5">
         <CardContent className="pt-6 space-y-3">
           <div className="flex items-center gap-2 flex-wrap text-xs">
-            {tags.length > 0 ? (
-              tags.slice(0, 3).map((t) => (
-                <Badge key={t} variant="pink">
-                  {TAG_LABEL[t] ?? t}
-                </Badge>
-              ))
-            ) : (
-              <Badge variant="outline">动态</Badge>
-            )}
+            <Badge variant="pink" className="shrink-0">
+              {POST_SECTION_LABEL[post.section as keyof typeof POST_SECTION_LABEL] ?? "动态"}
+            </Badge>
             {post.section === "MEDICAL" && post.hospital ? (
               <Badge variant="outline">{post.hospital}</Badge>
             ) : null}
diff --git a/src/components/post/PostForm.tsx b/src/components/post/PostForm.tsx
index 12c71a7..971bbf3 100644
--- a/src/components/post/PostForm.tsx
+++ b/src/components/post/PostForm.tsx
@@ -2,7 +2,9 @@
 
 import * as React from "react";
 import { useRouter } from "next/navigation";
-import { ImagePlus } from "lucide-react";
+import { ImagePlus, Paperclip, Loader2, Eye, Edit3 } from "lucide-react";
+import ReactMarkdown from "react-markdown";
+import remarkGfm from "remark-gfm";
 import { api } from "@/lib/api";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
@@ -18,10 +20,14 @@ type Mode = "create" | "edit";
 type Initial = Partial<{
   title: string;
   body: string;
+  section: string;
   visibility: string;
   status: string;
 }>;
 
+const IMAGE_MAX_SIZE = 5 * 1024 * 1024;
+const ATTACHMENT_MAX_SIZE = 10 * 1024 * 1024;
+
 export function PostForm({
   mode,
   postId,
@@ -38,50 +44,61 @@ export function PostForm({
 
   const [title, setTitle] = React.useState(initial?.title ?? "");
   const [body, setBody] = React.useState(initial?.body ?? "");
+  const [section, setSection] = React.useState(initial?.section ?? "QUESTION");
   const [visibility, setVisibility] = React.useState(initial?.visibility ?? "VERIFIED");
+  const [previewMode, setPreviewMode] = React.useState(false);
   const isDraftEdit = mode === "edit" && initial?.status === "DRAFT";
   const isAdmin = user?.tier === "ADMIN";
   const [submitting, setSubmitting] = React.useState(false);
   const [uploading, setUploading] = React.useState(false);
+  const fileInputRef = React.useRef<HTMLInputElement>(null);
+  const attachmentInputRef = React.useRef<HTMLInputElement>(null);
 
-  function insertAtCursor(snippet: string) {
-    const ta = bodyRef.current;
-    if (!ta) {
-      setBody((prev) => prev + snippet);
-      return;
-    }
-    const start = ta.selectionStart ?? body.length;
-    const end = ta.selectionEnd ?? body.length;
-    const next = body.slice(0, start) + snippet + body.slice(end);
-    setBody(next);
-    requestAnimationFrame(() => {
-      ta.focus();
-      const caret = start + snippet.length;
-      ta.setSelectionRange(caret, caret);
-    });
-  }
+  const uploadFile = React.useCallback(
+    async (file: File, purpose: string) => {
+      const isImage = file.type.startsWith("image/");
+      const maxSize = isImage ? IMAGE_MAX_SIZE : ATTACHMENT_MAX_SIZE;
+      if (file.size > maxSize) {
+        toast({
+          title: `文件过大，${isImage ? "图片" : "附件"}不能超过 ${isImage ? "5MB" : "10MB"}`,
+          variant: "danger",
+        });
+        return;
+      }
 
-  async function uploadImage(file: File) {
-    if (!file.type.startsWith("image/")) {
-      toast({ title: "请选择图片文件", variant: "danger" });
-      return;
-    }
-    if (file.size > 5 * 1024 * 1024) {
-      toast({ title: "图片大小请控制在 5MB 以内", variant: "danger" });
-      return;
-    }
-    setUploading(true);
-    try {
-      const res = await api.files.upload(file, "post-image");
-      insertAtCursor(`\n![](${res.url})\n`);
-      toast({ title: "图片已插入", variant: "success" });
-    } catch (err) {
-      const msg = err instanceof Error ? err.message : "上传失败";
-      toast({ title: "图片上传失败", description: msg, variant: "danger" });
-    } finally {
-      setUploading(false);
-    }
-  }
+      setUploading(true);
+      try {
+        const res = await api.files.upload(file, purpose);
+
+        const markdown = isImage
+          ? `![${file.name}](${res.url})`
+          : `[${file.name}](${res.url})`;
+        const ta = bodyRef.current;
+        if (ta) {
+          const start = ta.selectionStart ?? body.length;
+          const end = ta.selectionEnd ?? body.length;
+          const prefix = start > 0 && body[start - 1] !== "\n" ? "\n" : "";
+          const snippet = `${prefix}${markdown}\n`;
+          const next = body.slice(0, start) + snippet + body.slice(end);
+          setBody(next);
+          requestAnimationFrame(() => {
+            ta.focus();
+            const caret = start + snippet.length;
+            ta.setSelectionRange(caret, caret);
+          });
+        } else {
+          setBody((prev) => prev + `\n${markdown}\n`);
+        }
+        toast({ title: isImage ? "图片已插入" : "附件已插入", variant: "success" });
+      } catch (err) {
+        const msg = err instanceof Error ? err.message : "上传失败";
+        toast({ title: "上传失败", description: msg, variant: "danger" });
+      } finally {
+        setUploading(false);
+      }
+    },
+    [body.length, toast],
+  );
 
   async function submit(
     e: React.FormEvent,
@@ -92,7 +109,7 @@ export function PostForm({
     if (submitting) return;
     setSubmitting(true);
     try {
-      const payload = { title: title.trim(), body: body.trim(), visibility };
+      const payload = { title: title.trim(), body: body.trim(), section, visibility };
 
       if (mode === "create") {
         const res = await api.posts.create(payload, asDraft);
@@ -106,7 +123,7 @@ export function PostForm({
         } else {
           toast({
             title: "已提交",
-            description: "我们正在审核,通过后会出现在广场。可以去通知页面看进度。",
+            description: "我们正在审核，通过后会出现在广场。可以去通知页面看进度。",
             variant: "success",
           });
           router.push(toQueryRoute(`/posts/${res.id}`));
@@ -154,37 +171,133 @@ export function PostForm({
           <div className="space-y-2">
             <div className="flex items-center justify-between">
               <Label htmlFor="body">正文</Label>
-              <label className="inline-flex items-center gap-1 text-xs text-ink-muted hover:text-ink cursor-pointer">
-                <ImagePlus className="h-3.5 w-3.5" />
-                {uploading ? "上传中…" : "插入图片"}
-                <input
-                  type="file"
-                  accept="image/*"
-                  className="hidden"
-                  disabled={uploading}
-                  onChange={(e) => {
-                    const f = e.target.files?.[0];
-                    if (f) {
-                      uploadImage(f);
-                      e.target.value = "";
-                    }
-                  }}
-                />
-              </label>
+              <div className="flex items-center gap-1 rounded-lg border border-border overflow-hidden">
+                <button
+                  type="button"
+                  onClick={() => setPreviewMode(false)}
+                  className={`px-3 py-1 text-xs transition-colors ${!previewMode ? "bg-primary text-white" : "text-ink-muted hover:text-ink"}`}
+                >
+                  <Edit3 className="h-3 w-3 inline mr-1" />
+                  编辑
+                </button>
+                <button
+                  type="button"
+                  onClick={() => setPreviewMode(true)}
+                  className={`px-3 py-1 text-xs transition-colors ${previewMode ? "bg-primary text-white" : "text-ink-muted hover:text-ink"}`}
+                >
+                  <Eye className="h-3 w-3 inline mr-1" />
+                  预览
+                </button>
+              </div>
             </div>
-            <Textarea
-              id="body"
-              ref={bodyRef}
-              value={body}
-              onChange={(e) => setBody(e.target.value)}
-              placeholder="写得具体一点,让大家更容易帮到你或被你帮到。支持 Markdown。也可以贴链接,会自动渲染。"
-              minLength={5}
-              maxLength={20000}
-              rows={10}
-              required
-            />
+            {previewMode ? (
+              <div className="min-h-[260px] rounded-md border border-border bg-card p-4">
+                {body.trim() ? (
+                  <ReactMarkdown remarkPlugins={[remarkGfm]} components={{
+                    img: ({ src, alt }) => {
+                      if (!src) return null;
+                      const resolved = src.startsWith("/api/files/") ? api.files.url(src) : src;
+                      return <img src={resolved} alt={alt || ''} style={{maxWidth:'100%',height:'auto',borderRadius:'8px',margin:'12px 0'}} />;
+                    },
+                    a: ({ href, children, ...props }) => {
+                      if (!href) return <a {...props}>{children}</a>;
+                      const resolved = href.startsWith("/api/files/") ? api.files.url(href) : href;
+                      return <a href={resolved} target="_blank" rel="noopener noreferrer" {...props}>{children}</a>;
+                    }
+                  }}>
+                    {body}
+                  </ReactMarkdown>
+                ) : (
+                  <p className="text-ink-subtle text-sm italic">暂无内容</p>
+                )}
+              </div>
+            ) : (
+              <Textarea
+                id="body"
+                ref={bodyRef}
+                value={body}
+                onChange={(e) => setBody(e.target.value)}
+                placeholder="写得具体一点，让大家更容易帮到你或被你帮到。支持 Markdown。"
+                minLength={5}
+                maxLength={20000}
+                rows={10}
+                required
+              />
+            )}
             <p className="text-xs text-ink-subtle">{body.length} / 20000</p>
           </div>
+
+          <div className="space-y-2">
+            <Label htmlFor="section">板块</Label>
+            <select
+              id="section"
+              value={section}
+              onChange={(e) => setSection(e.target.value)}
+              className="w-full rounded-md border border-border bg-card px-3 py-2 text-sm"
+            >
+              {([["QUESTION","提问求助"],["OFFLINE_MEETUP","线下交友"],["MEDICAL","医疗信息"],["RESOURCE","资源分享"],["REFLECTION","感悟"]] as const).map(([val, label]) => (
+                <option key={val} value={val}>{label}</option>
+              ))}
+            </select>
+          </div>
+
+          <div className="flex items-center gap-2">
+            <Button
+              type="button"
+              variant="outline"
+              size="sm"
+              disabled={uploading}
+              onClick={() => fileInputRef.current?.click()}
+            >
+              <ImagePlus className="h-4 w-4 mr-1.5" />
+              插入图片
+            </Button>
+            <Button
+              type="button"
+              variant="outline"
+              size="sm"
+              disabled={uploading}
+              onClick={() => attachmentInputRef.current?.click()}
+            >
+              <Paperclip className="h-4 w-4 mr-1.5" />
+              插入附件
+            </Button>
+            <input
+              ref={fileInputRef}
+              type="file"
+              accept="image/*"
+              className="hidden"
+              onChange={(e) => {
+                const f = e.target.files?.[0];
+                if (f) {
+                  uploadFile(f, "post-image");
+                  e.target.value = "";
+                }
+              }}
+            />
+            <input
+              ref={attachmentInputRef}
+              type="file"
+              accept=".pdf,.doc,.docx,.xls,.xlsx,.ppt,.pptx,.txt,.csv,.zip,.rar,.7z"
+              className="hidden"
+              onChange={(e) => {
+                const f = e.target.files?.[0];
+                if (f) {
+                  uploadFile(f, "post-attachment");
+                  e.target.value = "";
+                }
+              }}
+            />
+            {uploading && (
+              <span className="inline-flex items-center gap-1 text-xs text-ink-muted">
+                <Loader2 className="h-3 w-3 animate-spin" />
+                上传中…
+              </span>
+            )}
+            <span className="text-xs text-ink-subtle">
+              图片 5MB · 附件 10MB
+            </span>
+          </div>
         </CardContent>
       </Card>
 
@@ -198,13 +311,13 @@ export function PostForm({
               onChange={(e) => setVisibility(e.target.value)}
               className="w-full rounded-md border border-border bg-card px-3 py-2 text-sm"
             >
-              <option value="PUBLIC">公开(所有访客)</option>
-              <option value="VERIFIED">认证成员可见(默认)</option>
+              <option value="PUBLIC">公开（所有访客）</option>
+              <option value="VERIFIED">认证成员可见（默认）</option>
               <option value="TRUSTED">仅信任成员可见</option>
             </select>
           </div>
           <p className="text-xs text-ink-subtle">
-            发布后系统会自动分类到合适的板块。如内容涉及违规,会在你的通知里告知。
+            发布后内容会经过 AI 审核;违规会被退回,边界内容会进入人工复核。
           </p>
         </CardContent>
       </Card>
@@ -248,4 +361,4 @@ export function PostForm({
       </div>
     </form>
   );
-}
+}
\ No newline at end of file
diff --git a/src/lib/api.ts b/src/lib/api.ts
index ca9fbd0..624b306 100644
--- a/src/lib/api.ts
+++ b/src/lib/api.ts
@@ -208,7 +208,7 @@ export interface ModerationDecision {
 export interface Post {
   id: string;
   author_id: string;
-  section: "POST" | "MEDICAL" | "RESOURCE";
+  section: "POST" | "QUESTION" | "OFFLINE_MEETUP" | "MEDICAL" | "RESOURCE" | "REFLECTION";
   title: string;
   body: string;
   tags: string;
@@ -470,7 +470,7 @@ export const api = {
 
     get: (id: string) => get<{ post: Post }>(`/api/posts/${id}`),
 
-    create: (data: { title: string; body: string; visibility?: string }, asDraft = false) =>
+    create: (data: { title: string; body: string; section: string; visibility?: string }, asDraft = false) =>
       post<{ ok: boolean; id: string; status: string }>(
         `/api/posts${asDraft ? "?draft=1" : ""}`,
         data,
@@ -478,7 +478,7 @@ export const api = {
 
     update: (
       id: string,
-      data: Partial<{ title: string; body: string; visibility: string }> & { adminStatus?: "DRAFT" | "PUBLISHED" },
+      data: Partial<{ title: string; body: string; section: string; visibility: string }> & { adminStatus?: "DRAFT" | "PUBLISHED" },
       asDraft = false,
     ) =>
       patch<{ ok: boolean; status: string }>(`/api/posts/${id}${asDraft ? "?draft=1" : ""}`, data),
diff --git a/worker/migrations/0008_update_posts_section_check.sql b/worker/migrations/0008_update_posts_section_check.sql
new file mode 100644
index 0000000..acf69d0
--- /dev/null
+++ b/worker/migrations/0008_update_posts_section_check.sql
@@ -0,0 +1,38 @@
+-- Migration 0008: Update posts section CHECK to match the new taxonomy
+-- (QUESTION, OFFLINE_MEETUP, MEDICAL, RESOURCE, REFLECTION + legacy POST)
+
+CREATE TABLE posts_new (
+  id TEXT PRIMARY KEY,
+  author_id TEXT NOT NULL REFERENCES users(id),
+  section TEXT NOT NULL CHECK (section IN ('POST','QUESTION','OFFLINE_MEETUP','MEDICAL','RESOURCE','REFLECTION')),
+  title TEXT NOT NULL,
+  body TEXT NOT NULL,
+  tags TEXT NOT NULL DEFAULT '[]',
+  hospital TEXT,
+  doctor TEXT,
+  city TEXT,
+  resource_kind TEXT,
+  cover_url TEXT,
+  visibility TEXT NOT NULL DEFAULT 'VERIFIED',
+  status TEXT NOT NULL DEFAULT 'PENDING_REVIEW',
+  moderation_verdict TEXT,
+  moderation_reason TEXT,
+  moderation_categories TEXT,
+  moderation_raw TEXT,
+  moderation_classifier TEXT,
+  moderated_at TEXT,
+  reviewed_by_id TEXT REFERENCES users(id),
+  reviewed_at TEXT,
+  created_at TEXT NOT NULL DEFAULT (datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT (datetime('now'))
+);
+
+INSERT INTO posts_new SELECT * FROM posts;
+
+DROP TABLE posts;
+ALTER TABLE posts_new RENAME TO posts;
+
+CREATE INDEX idx_posts_section_status ON posts(section, status);
+CREATE INDEX idx_posts_author ON posts(author_id);
+CREATE INDEX idx_posts_hospital ON posts(hospital);
+CREATE INDEX idx_posts_created_at ON posts(created_at);
\ No newline at end of file
diff --git a/worker/src/routes/files.ts b/worker/src/routes/files.ts
index 871d538..c9448e8 100644
--- a/worker/src/routes/files.ts
+++ b/worker/src/routes/files.ts
@@ -6,13 +6,30 @@ import { requireAuth } from "@/middleware/auth";
 
 const files = new Hono<{ Bindings: Env; Variables: Variables }>();
 
-const ALLOWED_TYPES: Record<string, string> = {
+const ALLOWED_IMAGE_TYPES: Record<string, string> = {
   "image/jpeg": "jpg",
   "image/png": "png",
   "image/webp": "webp",
   "image/gif": "gif",
 };
-const MAX_SIZE = 4 * 1024 * 1024; // 4 MB
+
+const ALLOWED_ATTACHMENT_TYPES: Record<string, string> = {
+  "application/pdf": "pdf",
+  "application/msword": "doc",
+  "application/vnd.openxmlformats-officedocument.wordprocessingml.document": "docx",
+  "application/vnd.ms-excel": "xls",
+  "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet": "xlsx",
+  "application/vnd.ms-powerpoint": "ppt",
+  "application/vnd.openxmlformats-officedocument.presentationml.presentation": "pptx",
+  "text/plain": "txt",
+  "text/csv": "csv",
+  "application/zip": "zip",
+  "application/x-rar-compressed": "rar",
+  "application/x-7z-compressed": "7z",
+};
+
+const IMAGE_MAX_SIZE = 5 * 1024 * 1024; // 5 MB
+const ATTACHMENT_MAX_SIZE = 10 * 1024 * 1024; // 10 MB
 
 // POST /api/files — upload a file to R2
 files.post("/", requireAuth, async (c) => {
@@ -31,9 +48,18 @@ files.post("/", requireAuth, async (c) => {
   }
   const file = fileEntry as Blob;
 
-  const ext = ALLOWED_TYPES[file.type];
-  if (!ext) return c.json({ error: "仅支持 JPG、PNG、WebP、GIF" }, 400);
-  if (file.size > MAX_SIZE) return c.json({ error: "文件不能超过 4MB" }, 400);
+  const isImage = ALLOWED_IMAGE_TYPES[file.type] !== undefined;
+  const isAttachment = ALLOWED_ATTACHMENT_TYPES[file.type] !== undefined;
+  if (!isImage && !isAttachment) {
+    return c.json({ error: "不支持的文件格式" }, 400);
+  }
+  const maxSize = isImage ? IMAGE_MAX_SIZE : ATTACHMENT_MAX_SIZE;
+  if (file.size > maxSize) {
+    const limit = isImage ? "5MB" : "10MB";
+    return c.json({ error: `文件不能超过 ${limit}` }, 400);
+  }
+
+  const ext = isImage ? ALLOWED_IMAGE_TYPES[file.type] : ALLOWED_ATTACHMENT_TYPES[file.type];
 
   const purpose = ((form.get("purpose") as string | null) ?? "misc").replace(/[^a-z0-9_-]/gi, "");
   const key = `${purpose}/${uploaderId}/${Date.now()}.${ext}`;
diff --git a/worker/src/routes/posts.ts b/worker/src/routes/posts.ts
index 5f5c1eb..443742e 100644
--- a/worker/src/routes/posts.ts
+++ b/worker/src/routes/posts.ts
@@ -121,6 +121,15 @@ function normalizePostSection(decisionSection: string): string {
   return "QUESTION";
 }
 
+function userPickedTags(section: string): string[] {
+  if (section === "QUESTION") return ["question-help"];
+  if (section === "OFFLINE_MEETUP") return ["offline-meetup"];
+  if (section === "MEDICAL") return ["medical-experience"];
+  if (section === "RESOURCE") return ["resource-offer"];
+  if (section === "REFLECTION") return ["reflection"];
+  return [];
+}
+
 async function notifyModerationOutcome(
   env: Env,
   authorEmail: string | null,
@@ -381,6 +390,7 @@ posts.post("/", requireAuth, requireTier("VERIFIED"), async (c) => {
     title: string;
     body: string;
     visibility?: string;
+    section?: string;
   }>();
   const title = (body.title ?? "").trim().slice(0, 200);
   const text = (body.body ?? "").trim();
@@ -394,12 +404,16 @@ posts.post("/", requireAuth, requireTier("VERIFIED"), async (c) => {
 
   if (asDraft) {
     const draftId = newId();
+    const draftSection = ["QUESTION","OFFLINE_MEETUP","MEDICAL","RESOURCE","REFLECTION"].includes(body.section ?? "")
+      ? body.section!
+      : "QUESTION";
+    const draftTags = userPickedTags(draftSection);
     await c.env.DB
       .prepare(
-        `INSERT INTO posts (id, author_id, section, title, body, visibility, status)
-         VALUES (?, ?, 'POST', ?, ?, ?, 'DRAFT')`,
+        `INSERT INTO posts (id, author_id, section, title, body, tags, visibility, status)
+         VALUES (?, ?, ?, ?, ?, ?, ?, 'DRAFT')`,
       )
-      .bind(draftId, viewer.id, title, text, visibility)
+      .bind(draftId, viewer.id, draftSection, title, text, JSON.stringify(draftTags), visibility)
       .run();
     return c.json({ ok: true, id: draftId, status: "DRAFT" });
   }
@@ -443,7 +457,14 @@ posts.post("/", requireAuth, requireTier("VERIFIED"), async (c) => {
 
   const finalVerdict = decision.verdict;
   const finalReason = decision.reason;
-  const section = normalizePostSection(decision.section);
+  const section = ["QUESTION","OFFLINE_MEETUP","MEDICAL","RESOURCE","REFLECTION"].includes(body.section ?? "")
+    ? body.section!
+    : normalizePostSection(decision.section);
+
+  // When user chose a section, derive matching tags so the post
+  // shows the correct badge and appears under the right filter tab.
+  const userTags = userPickedTags(section);
+  const tags = userTags.length > 0 ? userTags : decision.tags;
   const status = statusForVerdict(finalVerdict);
 
   await c.env.DB.prepare(
@@ -459,7 +480,7 @@ posts.post("/", requireAuth, requireTier("VERIFIED"), async (c) => {
       section,
       title,
       text,
-      JSON.stringify(decision.tags),
+      JSON.stringify(tags),
       visibility,
       status,
       finalVerdict,
@@ -524,6 +545,7 @@ posts.patch("/:id", requireAuth, async (c) => {
     title?: string;
     body?: string;
     visibility?: string;
+    section?: string;
     adminStatus?: "DRAFT" | "PUBLISHED";
   }>();
 
@@ -585,17 +607,21 @@ posts.patch("/:id", requireAuth, async (c) => {
 
   const finalVerdict = decision.verdict;
   const finalReason = decision.reason;
-  const section = normalizePostSection(decision.section);
+  const section = ["QUESTION","OFFLINE_MEETUP","MEDICAL","RESOURCE","REFLECTION"].includes(body.section ?? "")
+    ? body.section!
+    : normalizePostSection(decision.section);
+  const userTags = userPickedTags(section);
+  const tags = userTags.length > 0 ? userTags : decision.tags;
   const status = statusForVerdict(finalVerdict);
 
   if (asDraft) {
     await c.env.DB.prepare(
       `UPDATE posts SET
-         title = ?, body = ?, visibility = ?, status = 'DRAFT',
+         title = ?, body = ?, section = ?, tags = ?, visibility = ?, status = 'DRAFT',
          updated_at = datetime('now')
        WHERE id = ?`,
     )
-      .bind(nextTitle, nextText, nextVisibility, id)
+      .bind(nextTitle, nextText, section, JSON.stringify(tags), nextVisibility, id)
       .run();
     return c.json({ ok: true, status: "DRAFT" });
   }
@@ -612,7 +638,7 @@ posts.patch("/:id", requireAuth, async (c) => {
       nextTitle,
       nextText,
       section,
-      JSON.stringify(decision.tags),
+      JSON.stringify(tags),
       nextVisibility,
       status,
       finalVerdict,