fix(wiki): widen mime_type to VARCHAR(255) so Office uploads don't blow the column

mateclaw-server/src/main/java/vip/mate/wiki/service/WikiRawMaterialService.java

@@ -154,7 +154,7 @@ public class WikiRawMaterialService {
         entity.setKbId(kbId);
         entity.setTitle(title);
         entity.setSourceType(sourceType);
-        entity.setMimeType(mimeType);
+        entity.setMimeType(capMimeType(mimeType));
         entity.setSourcePath(sourcePath);
         entity.setFileSize(fileSize);
         entity.setProcessingStatus("pending");
@@ -195,6 +195,23 @@ public class WikiRawMaterialService {
         return entity;
     }
 
+    /**
+     * Defensive cap on the persisted Content-Type so a long upload header
+     * never blocks the insert. The column itself is wide (V84 → VARCHAR(255))
+     * but capping at the service layer keeps the schema and the writer in
+     * lockstep — we'd rather drop the rare overlong header (chrome-derived
+     * Content-Type with charset / boundary parameters) than fail the upload.
+     */
+    private static final int MIME_TYPE_MAX_CHARS = 255;
+
+    private static String capMimeType(String mimeType) {
+        if (mimeType == null) return null;
+        if (mimeType.length() <= MIME_TYPE_MAX_CHARS) return mimeType;
+        log.warn("[Wiki] Truncating Content-Type ({} chars) to fit storage column: {}",
+                mimeType.length(), mimeType.substring(0, 60) + "…");
+        return mimeType.substring(0, MIME_TYPE_MAX_CHARS);
+    }
+
     /**
      * CAS 式抢占：仅当当前状态为 pending 时才更新为 processing。
      *

mateclaw-server/src/main/resources/db/migration/h2/V84__widen_raw_material_mime_type.sql

@@ -0,0 +1,7 @@
+-- V80 created mate_wiki_raw_material.mime_type as VARCHAR(64). Office Open
+-- XML Content-Types blow that on the very first upload — docx is 71 chars,
+-- pptx is 73, xlsx is 65 — so any user uploading a Word / Excel / PowerPoint
+-- file hits "Data truncation: Data too long for column 'mime_type'".
+-- Widen to 255 (covers any registered RFC 6838 type with parameters).
+
+ALTER TABLE mate_wiki_raw_material ALTER COLUMN mime_type SET DATA TYPE VARCHAR(255);

mateclaw-server/src/main/resources/db/migration/mysql/V84__widen_raw_material_mime_type.sql

@@ -0,0 +1,7 @@
+-- V80 created mate_wiki_raw_material.mime_type as VARCHAR(64). Office Open
+-- XML Content-Types blow that on the very first upload — docx is 71 chars,
+-- pptx is 73, xlsx is 65 — so any user uploading a Word / Excel / PowerPoint
+-- file hits "Data truncation: Data too long for column 'mime_type'".
+-- Widen to 255 (covers any registered RFC 6838 type with parameters).
+
+ALTER TABLE mate_wiki_raw_material MODIFY COLUMN mime_type VARCHAR(255);