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src/components/chat/ChatAttachmentItems.jsx

@@ -16,7 +16,6 @@ import CodeRoundedIcon from '@mui/icons-material/CodeRounded';
 import DescriptionRoundedIcon from '@mui/icons-material/DescriptionRounded';
 import InsertDriveFileRoundedIcon from '@mui/icons-material/InsertDriveFileRounded';
 import InsertPhotoRoundedIcon from '@mui/icons-material/InsertPhotoRounded';
-import ErrorOutlineRoundedIcon from '@mui/icons-material/ErrorOutlineRounded';
 import OpenInNewRoundedIcon from '@mui/icons-material/OpenInNewRounded';
 import DownloadRoundedIcon from '@mui/icons-material/DownloadRounded';
 import { enqueueSnackbar } from 'notistack';
@@ -368,7 +367,6 @@ export class VfsAttachmentLink extends PureComponent {
     const { name, path, type, label, children, isUser = false } = this.props;
     const { isDownloading, isOpening, notFound } = this.state;
     const downloadName = name || (path ? path.split('/').pop() : 'datei');
-    const displayName = label || children || name || downloadName;
     const effectiveType = type || inferMimeType(downloadName);
     const vfsUrl = resolveVfsUrl(path);
     const canView = isBrowserViewable(downloadName, effectiveType);

src/components/chat/ChatDrawer.jsx

@@ -5,7 +5,6 @@ import Typography from '@mui/material/Typography';
 import IconButton from '@mui/material/IconButton';
 import Button from '@mui/material/Button';
 import InputBase from '@mui/material/InputBase';
-import TextInput from '../TextInput';
 import MenuItem from '@mui/material/MenuItem';
 import Select from '@mui/material/Select';
 import FormControl from '@mui/material/FormControl';
@@ -32,7 +31,7 @@ import { setting as settingApi } from '../../api';
 import chatAutomat, { selectPendingAskUser } from '../../automats/chatAutomat';
 import userSettingsAutomat from '../../automats/userSettingsAutomat';
 import vfsAutomat from '../../automats/vfsAutomat';
-import { VfsEditorPanel } from '../vfs';
+import { VfsEditorPanel, VfsFileIcon } from '../vfs';
 import ChatFlowList from './ChatFlowList';
 import AskUserPrompt from './AskUserPrompt';
 import { ACCEPT_STRING, readFileAttachment } from './chatAttachments';
@@ -71,7 +70,9 @@ export default class ChatDrawer extends PureComponent {
       sendError: s.sendError,
       activeTurns: s.activeTurns || [],
       inputText: '',
+      isInputFocused: false,
       stagedAttachments: [],
+      stagedReferences: [],
       isProcessingFiles: false,
       isDraggingFiles: false,
       attachmentError: null,
@@ -150,12 +151,68 @@ export default class ChatDrawer extends PureComponent {
   };
 
   handleInsertToChat = (text) => {
+    // If it's a file / line tag, e.g. [file.js#L10-L20](file.js#L10-L20) or [file.js](file.js)
+    const match =
+      typeof text === 'string' &&
+      text.trim().match(/^(!?)\[([^#\]]+)(?:#L?(\d+)(?:-L?(\d+))?)?\]\(([^)]+)\)$/);
+    if (match) {
+      const [, isImg, fileName, startLine, endLine, path] = match;
+      this.handleMentionReference({
+        fileName,
+        path,
+        startLine: startLine ? parseInt(startLine, 10) : null,
+        endLine: endLine ? parseInt(endLine, 10) : (startLine ? parseInt(startLine, 10) : null),
+        isImage: Boolean(isImg),
+      });
+      return;
+    }
     this.setState((prev) => ({
       inputText: prev.inputText ? `${prev.inputText}\n${text}` : text,
     }));
     this.focusInput(50);
   };
 
+  handleMentionReference = (refData) => {
+    if (!refData || !refData.fileName) return;
+    const {
+      fileName,
+      path = refData.fileName,
+      startLine = null,
+      endLine = null,
+      selectedText = '',
+      isImage = false,
+    } = refData;
+
+    this.setState((prev) => {
+      const exists = prev.stagedReferences.some(
+        (r) => r.fileName === fileName && r.startLine === startLine && r.endLine === endLine
+      );
+      if (exists) {
+        return null;
+      }
+      const newRef = {
+        id: `ref-${Date.now()}-${Math.random().toString(36).slice(2, 7)}`,
+        fileName,
+        path,
+        startLine,
+        endLine,
+        selectedText,
+        isImage,
+      };
+      return {
+        stagedReferences: [...prev.stagedReferences, newRef],
+      };
+    });
+    this.focusInput(50);
+  };
+
+  handleRemoveReference = (id) => {
+    this.setState((prev) => ({
+      stagedReferences: prev.stagedReferences.filter((r) => r.id !== id),
+    }));
+    this.focusInput(50);
+  };
+
   handleVfsResizerStart = (e) => {
     if (e.button !== undefined && e.button !== 0) return;
     e.preventDefault();
@@ -327,12 +384,51 @@ export default class ChatDrawer extends PureComponent {
 
   handleSend = async (e) => {
     e?.preventDefault();
-    const text = this.state.inputText.trim();
+    const rawText = this.state.inputText.trim();
     const attachments = this.state.stagedAttachments || [];
-    if ((!text && attachments.length === 0) || this.state.conversationState === 'busy' || this.state.isSending) {
+    const references = this.state.stagedReferences || [];
+
+    if (
+      (!rawText && attachments.length === 0 && references.length === 0) ||
+      this.state.conversationState === 'busy' ||
+      this.state.isSending
+    ) {
       return;
     }
-    this.setState({ inputText: '', stagedAttachments: [], attachmentError: null });
+
+    let text = rawText;
+    if (references.length > 0) {
+      const refMarkdown = references
+        .map((ref) => {
+          const lineRef = ref.startLine
+            ? (ref.startLine === ref.endLine ? `L${ref.startLine}` : `L${ref.startLine}-L${ref.endLine}`)
+            : null;
+          const lineLabel = ref.startLine
+            ? (ref.startLine === ref.endLine ? `:${ref.startLine}` : `:${ref.startLine}-${ref.endLine}`)
+            : '';
+          const link =
+            ref.isImage && !lineRef
+              ? `![${ref.fileName}](${ref.path || ref.fileName})`
+              : `[${ref.fileName}${lineLabel}](${ref.path || ref.fileName}${lineRef ? `#${lineRef}` : ''})`;
+
+          if (ref.selectedText && ref.selectedText.trim()) {
+            const ext = ref.fileName.split('.').pop() || '';
+            return `${link}\n\`\`\`${ext}\n${ref.selectedText.trim()}\n\`\`\``;
+          }
+          return link;
+        })
+        .join('\n\n');
+
+      text = text ? `${refMarkdown}\n\n${text}` : refMarkdown;
+    }
+
+    this.setState({
+      inputText: '',
+      stagedAttachments: [],
+      stagedReferences: [],
+      attachmentError: null,
+    });
+
     try {
       await chatAutomat.actions.sendMessage(text, attachments);
     } catch {
@@ -1009,8 +1105,10 @@ export default class ChatDrawer extends PureComponent {
       selectedConversationId,
       draftConversation,
       inputText,
+      isInputFocused,
       sendError,
       stagedAttachments,
+      stagedReferences,
       isProcessingFiles,
       isDraggingFiles,
       attachmentError,
@@ -1020,7 +1118,10 @@ export default class ChatDrawer extends PureComponent {
     const isBusy = conversationState === 'busy';
     const isWorking = isBusy || isSending;
     const canChat = (Boolean(selectedConversationId) || draftConversation) && !pendingAsk;
-    const canSend = !isWorking && canChat && (Boolean(inputText.trim()) || stagedAttachments.length > 0);
+    const canSend =
+      !isWorking &&
+      canChat &&
+      (Boolean(inputText.trim()) || stagedAttachments.length > 0 || stagedReferences.length > 0);
 
     return (
       <Box
@@ -1164,24 +1265,158 @@ export default class ChatDrawer extends PureComponent {
             style={{ display: 'none' }}
           />
 
-          <TextInput
-            inputRef={this.inputRef}
-            multiline
-            maxRows={4}
-            fullWidth
-            value={inputText}
-            onChange={(e) => this.setState({ inputText: e.target.value })}
-            onKeyDown={this.handleKeyDown}
-            onPaste={this.handlePaste}
-            disabled={!canChat}
-            placeholder={
-              pendingAsk
-                ? 'Bitte Frage oben beantworten…'
-                : stagedAttachments.length > 0
-                  ? 'Nachricht hinzufügen oder direkt absenden…'
-                  : undefined
-            }
-          />
+          {/* Unified Copilot-style input container with context reference pills */}
+          <Box
+            onClick={() => this.focusInput(0)}
+            sx={{
+              flex: 1,
+              minWidth: 0,
+              display: 'flex',
+              flexDirection: 'column',
+              bgcolor: 'background.paper',
+              border: '1px solid',
+              borderColor: isInputFocused ? 'primary.main' : 'divider',
+              boxShadow: isInputFocused ? (theme) => `0 0 0 1px ${theme.palette.primary.main}` : 'none',
+              borderRadius: 2.5,
+              p: 0.75,
+              gap: 0.5,
+              cursor: 'text',
+              transition: 'border-color 0.15s, box-shadow 0.15s',
+              minHeight: 40,
+              boxSizing: 'border-box',
+            }}
+          >
+            {stagedReferences.length > 0 && (
+              <Box
+                sx={{
+                  display: 'flex',
+                  flexWrap: 'wrap',
+                  gap: 0.6,
+                  alignItems: 'center',
+                  mb: 0.25,
+                }}
+              >
+                {stagedReferences.map((ref) => (
+                  <Box
+                    key={ref.id}
+                    onClick={(e) => {
+                      e.stopPropagation();
+                      vfsAutomat.actions.openVfs();
+                      vfsAutomat.actions.selectFile(ref.fileName);
+                    }}
+                    sx={{
+                      display: 'inline-flex',
+                      alignItems: 'center',
+                      gap: 0.6,
+                      py: 0.2,
+                      pl: 0.7,
+                      pr: 0.4,
+                      borderRadius: 1.5,
+                      bgcolor: (theme) =>
+                        theme.palette.mode === 'dark'
+                          ? 'rgba(255, 255, 255, 0.08)'
+                          : 'rgba(0, 0, 0, 0.05)',
+                      border: '1px solid',
+                      borderColor: (theme) =>
+                        theme.palette.mode === 'dark'
+                          ? 'rgba(255, 255, 255, 0.12)'
+                          : 'rgba(0, 0, 0, 0.1)',
+                      color: 'text.primary',
+                      fontSize: '0.75rem',
+                      lineHeight: 1.2,
+                      userSelect: 'none',
+                      cursor: 'pointer',
+                      transition: 'all 0.15s ease',
+                      '&:hover': {
+                        bgcolor: (theme) =>
+                          theme.palette.mode === 'dark'
+                            ? 'rgba(255, 255, 255, 0.14)'
+                            : 'rgba(0, 0, 0, 0.09)',
+                        borderColor: 'primary.light',
+                      },
+                    }}
+                  >
+                    <VfsFileIcon fileName={ref.fileName} sx={{ fontSize: 14 }} />
+                    <Typography
+                      component="span"
+                      sx={{
+                        fontFamily: "'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, Courier, monospace",
+                        fontSize: '0.74rem',
+                        fontWeight: 600,
+                        letterSpacing: '-0.2px',
+                        display: 'inline-flex',
+                        alignItems: 'center',
+                      }}
+                    >
+                      {ref.fileName}
+                      {ref.startLine && (
+                        <Box
+                          component="span"
+                          sx={{
+                            color: 'primary.main',
+                            fontWeight: 700,
+                            ml: 0.3,
+                          }}
+                        >
+                          :{ref.startLine === ref.endLine ? ref.startLine : `${ref.startLine}-${ref.endLine}`}
+                        </Box>
+                      )}
+                    </Typography>
+                    <IconButton
+                      size="small"
+                      onClick={(e) => {
+                        e.stopPropagation();
+                        this.handleRemoveReference(ref.id);
+                      }}
+                      aria-label="Referenz entfernen"
+                      sx={{
+                        p: 0.2,
+                        ml: 0.1,
+                        color: 'text.secondary',
+                        '&:hover': {
+                          color: 'error.main',
+                          bgcolor: 'action.hover',
+                        },
+                      }}
+                    >
+                      <CloseRoundedIcon sx={{ fontSize: 13 }} />
+                    </IconButton>
+                  </Box>
+                ))}
+              </Box>
+            )}
+
+            <InputBase
+              inputRef={this.inputRef}
+              multiline
+              minRows={1}
+              maxRows={5}
+              fullWidth
+              value={inputText}
+              onChange={(e) => this.setState({ inputText: e.target.value })}
+              onKeyDown={this.handleKeyDown}
+              onPaste={this.handlePaste}
+              onFocus={() => this.setState({ isInputFocused: true })}
+              onBlur={() => this.setState({ isInputFocused: false })}
+              disabled={!canChat}
+              placeholder={
+                pendingAsk
+                  ? 'Bitte Frage oben beantworten…'
+                  : stagedAttachments.length > 0
+                    ? 'Nachricht hinzufügen oder direkt absenden…'
+                    : undefined
+              }
+              sx={{
+                px: 0.5,
+                py: 0.1,
+                fontSize: '0.875rem',
+                lineHeight: 1.45,
+                '& .MuiInputBase-input': {
+                  p: 0,
+                },
+              }}
+            />
+          </Box>
 
           <IconButton
             type="submit"
@@ -1318,7 +1553,10 @@ export default class ChatDrawer extends PureComponent {
                 overflow: 'hidden',
               }}
             >
-              <VfsEditorPanel onInsertToChat={this.handleInsertToChat} />
+              <VfsEditorPanel
+                onInsertToChat={this.handleInsertToChat}
+                onMentionReference={this.handleMentionReference}
+              />
             </Box>
           )}
 

src/components/chat/HealingMarkdown.jsx

@@ -25,8 +25,6 @@ import { VfsAttachmentLink, parseAttachmentTag, classifyLinkTarget, resolveVfsUr
  * ~~strike~~, [links](url) and ![images](url).
  */
 
-const SAFE_URL = /^(https?:\/\/|mailto:|\/|#)/i;
-
 /**
  * Resolve an image target to something the browser may load.
  *