fix(status): banner Details strips Markdown syntax, not every #, _, >, * (#308)

plain() deleted those characters everywhere, so "join #lotus-general"
lost its #, snake_case and @some_user lost underscores, "->" became
"-", "5 * 3" became "5  3", and "<b>" became "<b". Strip only syntax:
heading / quote / list markers at line start, paired **x** *x* _x_ `x`,
and HTML tags.

Fixes #308

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017PCb59uY3UKqDqt7B6hzd5

src/app/components/AccountDataEditor.tsx

@@ -297,7 +297,7 @@ export function AccountDataEditor({
             </Chip>
           </Box>
           <Box shrink="No">
-            <IconButton type="button" onClick={requestClose} variant="Surface" aria-label="Close">
+            <IconButton onClick={requestClose} variant="Surface" aria-label="Close">
               <Icon src={Icons.Cross} />
             </IconButton>
           </Box>

src/app/components/DeviceVerificationSetup.tsx

@@ -315,7 +315,7 @@ export const DeviceVerificationSetup = forwardRef<HTMLDivElement, DeviceVerifica
               Setup Device Verification
             </Text>
           </Box>
-          <IconButton type="button" size="300" radii="300" onClick={onCancel} aria-label="Cancel">
+          <IconButton size="300" radii="300" onClick={onCancel} aria-label="Cancel">
             <Icon src={Icons.Cross} />
           </IconButton>
         </Header>
@@ -361,7 +361,7 @@ export const DeviceVerificationReset = forwardRef<HTMLDivElement, DeviceVerifica
               Reset Device Verification
             </Text>
           </Box>
-          <IconButton type="button" size="300" radii="300" onClick={onCancel} aria-label="Cancel">
+          <IconButton size="300" radii="300" onClick={onCancel} aria-label="Cancel">
             <Icon src={Icons.Cross} />
           </IconButton>
         </Header>

src/app/features/common-settings/developer-tools/StateEventEditor.tsx

@@ -275,7 +275,7 @@ export function StateEventEditor({ type, stateKey, requestClose }: StateEventEdi
             </Chip>
           </Box>
           <Box shrink="No">
-            <IconButton type="button" onClick={requestClose} variant="Surface" aria-label="Close">
+            <IconButton onClick={requestClose} variant="Surface" aria-label="Close">
               <Icon src={Icons.Cross} />
             </IconButton>
           </Box>

src/app/features/room/PollCreator.tsx

@@ -143,7 +143,7 @@ export function PollCreator({ roomId, threadRootId, onClose }: PollCreatorProps)
                   Create Poll
                 </Text>
               </Box>
-              <IconButton type="button" size="300" radii="300" onClick={onClose} aria-label="Close">
+              <IconButton size="300" radii="300" onClick={onClose} aria-label="Close">
                 <Icon src={Icons.Cross} />
               </IconButton>
             </Header>

src/app/features/room/ReportRoomModal.tsx

@@ -118,7 +118,7 @@ export function ReportRoomModal({ roomId, onClose }: ReportRoomModalProps) {
                   Report Room
                 </Text>
               </Box>
-              <IconButton type="button" size="300" onClick={onClose} radii="300" aria-label="Close">
+              <IconButton size="300" onClick={onClose} radii="300" aria-label="Close">
                 <Icon src={Icons.Cross} />
               </IconButton>
             </Header>

src/app/features/room/ReportUserModal.tsx

@@ -124,7 +124,7 @@ export function ReportUserModal({ userId, onClose }: ReportUserModalProps) {
                   Report User
                 </Text>
               </Box>
-              <IconButton type="button" size="300" onClick={onClose} radii="300" aria-label="Close">
+              <IconButton size="300" onClick={onClose} radii="300" aria-label="Close">
                 <Icon src={Icons.Cross} />
               </IconButton>
             </Header>

src/app/features/room/ScheduleMessageModal.tsx

@@ -202,7 +202,7 @@ export function ScheduleMessageModal({
                   {title}
                 </Text>
               </Box>
-              <IconButton type="button" size="300" radii="300" onClick={onClose} aria-label="Close">
+              <IconButton size="300" radii="300" onClick={onClose} aria-label="Close">
                 <Icon src={Icons.Cross} />
               </IconButton>
             </Header>

src/app/features/room/message/Message.tsx

@@ -725,13 +725,7 @@ export const MessageDeleteItem = as<
                     Delete Message
                   </Text>
                 </Box>
-                <IconButton
-                  type="button"
-                  size="300"
-                  onClick={handleClose}
-                  radii="300"
-                  aria-label="Close"
-                >
+                <IconButton size="300" onClick={handleClose} radii="300" aria-label="Close">
                   <Icon src={Icons.Cross} />
                 </IconButton>
               </Header>
@@ -871,13 +865,7 @@ export const MessageReportItem = as<
                     Report Message
                   </Text>
                 </Box>
-                <IconButton
-                  type="button"
-                  size="300"
-                  onClick={handleClose}
-                  radii="300"
-                  aria-label="Close"
-                >
+                <IconButton size="300" onClick={handleClose} radii="300" aria-label="Close">
                   <Icon src={Icons.Cross} />
                 </IconButton>
               </Header>

src/app/utils/kumaStatus.test.ts

@@ -1,6 +1,7 @@
 import { test } from 'node:test';
 import assert from 'node:assert/strict';
 import {
+  plain,
   DEFAULT_GROUPS,
   kumaBeatTime,
   kumaUrls,
@@ -260,3 +261,27 @@ test('a dismissed calls-down banner lets the next one through, never hides serve
     'server-down',
   );
 });
+
+test('plain: strips Markdown syntax only, keeps ordinary #, _, > and * (#308)', () => {
+  assert.equal(
+    plain('join #lotus-general or #announcements:lotusguild.org'),
+    'join #lotus-general or #announcements:lotusguild.org',
+  );
+  assert.equal(
+    plain('ping @some_user about snake_case and C#'),
+    'ping @some_user about snake_case and C#',
+  );
+  assert.equal(
+    plain('calls -> fixed, > 5 people, 5 * 3 = 15'),
+    'calls -> fixed, > 5 people, 5 * 3 = 15',
+  );
+  assert.equal(
+    plain('# Heading\n* item one\n- item two\n> quoted'),
+    'Heading\nitem one\nitem two\nquoted',
+  );
+  assert.equal(plain('**bold**, *em*, _em_, `/sfu/get`'), 'bold, em, em, /sfu/get');
+  assert.equal(
+    plain('Read the <b>guide</b> <img src=x onerror=alert(1)> [docs](https://x.y)'),
+    'Read the guide  docs',
+  );
+});

src/app/utils/kumaStatus.ts

@@ -240,12 +240,25 @@ const incidentTone = (style: string): BannerTone => {
 };
 
 /** Markdown-ish incident text as plain text for the Details line. */
-const plain = (s: string): string =>
+/**
+ * [Gitea #308] Markdown → plain text for the Details line. Strips only the
+ * syntax: removing every `*_\`#>` also broke "#lotus-general", "snake_case",
+ * "->" and "5 * 3". HTML tags are dropped (React escapes the text anyway).
+ */
+export const plain = (s: string): string =>
   s
     .replace(/!\[[^\]]*\]\([^)]*\)/g, '')
     .replace(/\[([^\]]+)\]\([^)]*\)/g, '$1')
-    .replace(/[*_`#>]/g, '')
-    .replace(/\s+\n/g, '\n')
+    .replace(/<\/?[a-z][^>]*>/gi, '')
+    .replace(/^[ \t]{0,3}#{1,6}[ \t]+/gm, '')
+    .replace(/^[ \t]*>[ \t]?/gm, '')
+    .replace(/^[ \t]*[*+-][ \t]+/gm, '')
+    .replace(/`([^`\n]+)`/g, '$1')
+    .replace(/\*\*(?=\S)([^*\n]*?\S)\*\*/g, '$1')
+    .replace(/__(?=\S)([^_\n]*?\S)__/g, '$1')
+    .replace(/(^|[^\w*])\*(?=\S)([^*\n]*?\S)\*(?![\w*])/g, '$1$2')
+    .replace(/(^|[^\w])_(?=\S)([^_\n]*?\S)_(?!\w)/g, '$1$2')
+    .replace(/[ \t]+\n/g, '\n')
     .trim();
 
 /**