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type { AutocompleteProvider, AutocompleteSuggestions } from \"../autocomplete.ts\";\nimport { getKeybindings } from \"../keybindings.ts\";\nimport { decodePrintableKey, matchesKey } from \"../keys.ts\";\nimport { KillRing } from \"../kill-ring.ts\";\nimport { type Component, CURSOR_MARKER, type Focusable, type TUI } from \"../tui.ts\";\nimport { UndoStack } from \"../undo-stack.ts\";\nimport {\n\tcjkBreakRegex,\n\tgetGraphemeSegmenter,\n\tgetWordSegmenter,\n\tisWhitespaceChar,\n\ttruncateToWidth,\n\tvisibleWidth,\n} from \"../utils.ts\";\nimport { findWordBackward, findWordForward } from \"../word-navigation.ts\";\nimport { SelectList, type SelectListLayoutOptions, type SelectListTheme } from \"./select-list.ts\";\n\nconst graphemeSegmenter = getGraphemeSegmenter();\nconst wordSegmenter = getWordSegmenter();\n\n/** Regex matching paste markers like `[paste #1 +123 lines]` or `[paste #2 1234 chars]`. */\nconst PASTE_MARKER_REGEX = /\\[paste #(\\d+)( (\\+\\d+ lines|\\d+ chars))?\\]/g;\n\n/** Non-global version for single-segment testing. */\nconst PASTE_MARKER_SINGLE = /^\\[paste #(\\d+)( (\\+\\d+ lines|\\d+ chars))?\\]$/;\n\n/** Check if a segment is a paste marker (i.e. was merged by segmentWithMarkers). */\nfunction isPasteMarker(segment: string): boolean {\n\treturn segment.length >= 10 && PASTE_MARKER_SINGLE.test(segment);\n}\n\n/**\n * A segmenter that wraps Intl.Segmenter and merges graphemes that fall\n * within paste markers into single atomic segments.  This makes cursor\n * movement, deletion, word-wrap, etc. treat paste markers as single units.\n *\n * Only markers whose numeric ID exists in `validIds` are merged.\n */\nfunction segmentWithMarkers(\n\ttext: string,\n\tbaseSegmenter: Intl.Segmenter,\n\tvalidIds: Set<number>,\n): Iterable<Intl.SegmentData> {\n\t// Fast path: no paste markers in the text or no valid IDs.\n\tif (validIds.size === 0 || !text.includes(\"[paste #\")) {\n\t\treturn baseSegmenter.segment(text);\n\t}\n\n\t// Find all marker spans with valid IDs.\n\tconst markers: Array<{ start: number; end: number }> = [];\n\tfor (const m of text.matchAll(PASTE_MARKER_REGEX)) {\n\t\tconst id = Number.parseInt(m[1]!, 10);\n\t\tif (!validIds.has(id)) continue;\n\t\tmarkers.push({ start: m.index, end: m.index + m[0].length });\n\t}\n\tif (markers.length === 0) {\n\t\treturn baseSegmenter.segment(text);\n\t}\n\n\t// Build merged segment list.\n\tconst baseSegments = baseSegmenter.segment(text);\n\tconst result: Intl.SegmentData[] = [];\n\tlet markerIdx = 0;\n\n\tfor (const seg of baseSegments) {\n\t\t// Skip past markers that are entirely before this segment.\n\t\twhile (markerIdx < markers.length && markers[markerIdx]!.end <= seg.index) {\n\t\t\tmarkerIdx++;\n\t\t}\n\n\t\tconst marker = markerIdx < markers.length ? markers[markerIdx]! : null;\n\n\t\tif (marker && seg.index >= marker.start && seg.index < marker.end) {\n\t\t\t// This segment falls inside a marker.\n\t\t\t// If this is the first segment of the marker, emit a merged segment.\n\t\t\tif (seg.index === marker.start) {\n\t\t\t\tconst markerText = text.slice(marker.start, marker.end);\n\t\t\t\tresult.push({\n\t\t\t\t\tsegment: markerText,\n\t\t\t\t\tindex: marker.start,\n\t\t\t\t\tinput: text,\n\t\t\t\t});\n\t\t\t}\n\t\t\t// Otherwise skip (already merged into the first segment).\n\t\t} else {\n\t\t\tresult.push(seg);\n\t\t}\n\t}\n\n\treturn result;\n}\n\n/**\n * Represents a chunk of text for word-wrap layout.\n * Tracks both the text content and its position in the original line.\n */\nexport interface TextChunk {\n\ttext: string;\n\tstartIndex: number;\n\tendIndex: number;\n}\n\n/**\n * Split a line into word-wrapped chunks.\n * Wraps at word boundaries when possible, falling back to character-level\n * wrapping for words longer than the available width.\n *\n * @param line - The text line to wrap\n * @param maxWidth - Maximum visible width per chunk\n * @param preSegmented - Optional pre-segmented graphemes (e.g. with paste-marker awareness).\n *                       When omitted the default Intl.Segmenter is used.\n * @returns Array of chunks with text and position information\n */\nexport function wordWrapLine(line: string, maxWidth: number, preSegmented?: Intl.SegmentData[]): TextChunk[] {\n\tif (!line || maxWidth <= 0) {\n\t\treturn [{ text: \"\", startIndex: 0, endIndex: 0 }];\n\t}\n\n\tconst lineWidth = visibleWidth(line);\n\tif (lineWidth <= maxWidth) {\n\t\treturn [{ text: line, startIndex: 0, endIndex: line.length }];\n\t}\n\n\tconst chunks: TextChunk[] = [];\n\tconst segments = preSegmented ?? [...graphemeSegmenter.segment(line)];\n\n\tlet currentWidth = 0;\n\tlet chunkStart = 0;\n\n\t// Wrap opportunity: the position after the last whitespace before a non-whitespace\n\t// grapheme, i.e. where a line break is allowed.\n\tlet wrapOppIndex = -1;\n\tlet wrapOppWidth = 0;\n\n\tfor (let i = 0; i < segments.length; i++) {\n\t\tconst seg = segments[i]!;\n\t\tconst grapheme = seg.segment;\n\t\tconst gWidth = visibleWidth(grapheme);\n\t\tconst charIndex = seg.index;\n\t\tconst isWs = !isPasteMarker(grapheme) && isWhitespaceChar(grapheme);\n\n\t\t// Overflow check before advancing.\n\t\tif (currentWidth + gWidth > maxWidth) {\n\t\t\tif (wrapOppIndex >= 0 && currentWidth - wrapOppWidth + gWidth <= maxWidth) {\n\t\t\t\t// Backtrack to last wrap opportunity (the remaining content\n\t\t\t\t// plus the current grapheme still fits within maxWidth).\n\t\t\t\tchunks.push({ text: line.slice(chunkStart, wrapOppIndex), startIndex: chunkStart, endIndex: wrapOppIndex });\n\t\t\t\tchunkStart = wrapOppIndex;\n\t\t\t\tcurrentWidth -= wrapOppWidth;\n\t\t\t} else if (chunkStart < charIndex) {\n\t\t\t\t// No viable wrap opportunity: force-break at current position.\n\t\t\t\t// This also handles the case where backtracking to a word\n\t\t\t\t// boundary wouldn't help because the remaining content plus\n\t\t\t\t// the current grapheme (e.g. a wide character) still exceeds\n\t\t\t\t// maxWidth.\n\t\t\t\tchunks.push({ text: line.slice(chunkStart, charIndex), startIndex: chunkStart, endIndex: charIndex });\n\t\t\t\tchunkStart = charIndex;\n\t\t\t\tcurrentWidth = 0;\n\t\t\t}\n\t\t\twrapOppIndex = -1;\n\t\t}\n\n\t\tif (gWidth > maxWidth) {\n\t\t\t// Single atomic segment wider than maxWidth (e.g. paste marker\n\t\t\t// in a narrow terminal). Re-wrap it at grapheme granularity.\n\n\t\t\t// The segment remains logically atomic for cursor\n\t\t\t// movement / editing — the split is purely visual for word-wrap layout.\n\t\t\tconst subChunks = wordWrapLine(grapheme, maxWidth);\n\t\t\tfor (let j = 0; j < subChunks.length - 1; j++) {\n\t\t\t\tconst sc = subChunks[j]!;\n\t\t\t\tchunks.push({ text: sc.text, startIndex: charIndex + sc.startIndex, endIndex: charIndex + sc.endIndex });\n\t\t\t}\n\t\t\tconst last = subChunks[subChunks.length - 1]!;\n\t\t\tchunkStart = charIndex + last.startIndex;\n\t\t\tcurrentWidth = visibleWidth(last.text);\n\t\t\twrapOppIndex = -1;\n\t\t\tcontinue;\n\t\t}\n\n\t\t// Advance.\n\t\tcurrentWidth += gWidth;\n\n\t\t// Record wrap opportunity: whitespace followed by non-whitespace\n\t\t// (multiple spaces join; the break point is after the last space),\n\t\t// or at a boundary where either side is CJK (CJK allows breaking\n\t\t// between any adjacent characters).\n\t\tconst next = segments[i + 1];\n\t\tif (isWs && next && (isPasteMarker(next.segment) || !isWhitespaceChar(next.segment))) {\n\t\t\twrapOppIndex = next.index;\n\t\t\twrapOppWidth = currentWidth;\n\t\t} else if (!isWs && next && !isWhitespaceChar(next.segment)) {\n\t\t\tconst isCjk = !isPasteMarker(grapheme) && cjkBreakRegex.test(grapheme);\n\t\t\tconst nextIsCjk = !isPasteMarker(next.segment) && cjkBreakRegex.test(next.segment);\n\t\t\tif (isCjk || nextIsCjk) {\n\t\t\t\twrapOppIndex = next.index;\n\t\t\t\twrapOppWidth = currentWidth;\n\t\t\t}\n\t\t}\n\t}\n\n\t// Push final chunk.\n\tchunks.push({ text: line.slice(chunkStart), startIndex: chunkStart, endIndex: line.length });\n\n\treturn chunks;\n}\n\n// Kitty CSI-u sequences for printable keys, including optional shifted/base codepoints.\ninterface EditorState {\n\tlines: string[];\n\tcursorLine: number;\n\tcursorCol: number;\n}\n\ninterface LayoutLine {\n\ttext: string;\n\thasCursor: boolean;\n\tcursorPos?: number;\n}\n\nexport interface EditorTheme {\n\tborderColor: (str: string) => string;\n\tselectList: SelectListTheme;\n}\n\nexport interface EditorOptions {\n\tpaddingX?: number;\n\tautocompleteMaxVisible?: number;\n}\n\nconst SLASH_COMMAND_SELECT_LIST_LAYOUT: SelectListLayoutOptions = {\n\tminPrimaryColumnWidth: 12,\n\tmaxPrimaryColumnWidth: 32,\n};\n\nconst ATTACHMENT_AUTOCOMPLETE_DEBOUNCE_MS = 20;\nconst DEFAULT_AUTOCOMPLETE_TRIGGER_CHARACTERS = [\"@\", \"#\"];\n\nfunction escapeCharacterClass(value: string): string {\n\treturn value.replace(/[\\\\^$.*+?()[\\]{}|-]/g, \"\\\\$&\");\n}\n\nfunction buildTriggerPattern(triggerCharacters: string[]): RegExp {\n\treturn new RegExp(`(?:^|[\\\\s])[${triggerCharacters.map(escapeCharacterClass).join(\"\")}][^\\\\s]*$`);\n}\n\nfunction buildDebouncePattern(triggerCharacters: string[]): RegExp {\n\tconst escapedWithoutAt = triggerCharacters.filter((character) => character !== \"@\").map(escapeCharacterClass);\n\treturn new RegExp(`(?:^|[ \\\\t])(?:@(?:\"[^\"]*|[^\\\\s]*)|[${escapedWithoutAt.join(\"\")}][^\\\\s]*)$`);\n}\n\nexport class Editor implements Component, Focusable {\n\tprivate state: EditorState = {\n\t\tlines: [\"\"],\n\t\tcursorLine: 0,\n\t\tcursorCol: 0,\n\t};\n\n\t/** Focusable interface - set by TUI when focus changes */\n\tfocused: boolean = false;\n\n\tprotected tui: TUI;\n\tprivate theme: EditorTheme;\n\tprivate paddingX: number = 0;\n\n\t// Store last render width for cursor navigation\n\tprivate lastWidth: number = 80;\n\n\t// Vertical scrolling support\n\tprivate scrollOffset: number = 0;\n\n\t// Border color (can be changed dynamically)\n\tpublic borderColor: (str: string) => string;\n\n\t// Autocomplete support\n\tprivate autocompleteProvider?: AutocompleteProvider;\n\tprivate autocompleteTriggerCharacters = [...DEFAULT_AUTOCOMPLETE_TRIGGER_CHARACTERS];\n\tprivate autocompleteTriggerPattern = buildTriggerPattern(this.autocompleteTriggerCharacters);\n\tprivate autocompleteDebouncePattern = buildDebouncePattern(this.autocompleteTriggerCharacters);\n\tprivate autocompleteList?: SelectList;\n\tprivate autocompleteState: \"regular\" | \"force\" | null = null;\n\tprivate autocompletePrefix: string = \"\";\n\tprivate autocompleteMaxVisible: number = 5;\n\tprivate autocompleteAbort?: AbortController;\n\tprivate autocompleteDebounceTimer?: ReturnType<typeof setTimeout>;\n\tprivate autocompleteRequestTask: Promise<void> = Promise.resolve();\n\tprivate autocompleteStartToken: number = 0;\n\tprivate autocompleteRequestId: number = 0;\n\n\t// Paste tracking for large pastes\n\tprivate pastes: Map<number, string> = new Map();\n\tprivate pasteCounter: number = 0;\n\n\t// Bracketed paste mode buffering\n\tprivate pasteBuffer: string = \"\";\n\tprivate isInPaste: boolean = false;\n\n\t// Prompt history for up/down navigation\n\tprivate history: string[] = [];\n\tprivate historyIndex: number = -1; // -1 = not browsing, 0 = most recent, 1 = older, etc.\n\tprivate historyDraft: EditorState | null = null;\n\n\t// Kill ring for Emacs-style kill/yank operations\n\tprivate killRing = new KillRing();\n\tprivate lastAction: \"kill\" | \"yank\" | \"type-word\" | null = null;\n\n\t// Character jump mode\n\tprivate jumpMode: \"forward\" | \"backward\" | null = null;\n\n\t// Preferred visual column for vertical cursor movement (sticky column)\n\tprivate preferredVisualCol: number | null = null;\n\n\t// When the cursor is snapped to the start of an atomic segment, e.g. a\n\t// paste marker, cursorCol no longer reflects where the cursor would have\n\t// landed. This field stores the pre-snap cursorCol so that the next\n\t// vertical move can resolve it to a visual column on whatever VL it belongs\n\t// to.\n\tprivate snappedFromCursorCol: number | null = null;\n\n\t// Undo support\n\tprivate undoStack = new UndoStack<EditorState>();\n\n\tpublic onSubmit?: (text: string) => void;\n\tpublic onChange?: (text: string) => void;\n\tpublic disableSubmit: boolean = false;\n\n\tconstructor(tui: TUI, theme: EditorTheme, options: EditorOptions = {}) {\n\t\tthis.tui = tui;\n\t\tthis.theme = theme;\n\t\tthis.borderColor = theme.borderColor;\n\t\tconst paddingX = options.paddingX ?? 0;\n\t\tthis.paddingX = Number.isFinite(paddingX) ? Math.max(0, Math.floor(paddingX)) : 0;\n\t\tconst maxVisible = options.autocompleteMaxVisible ?? 5;\n\t\tthis.autocompleteMaxVisible = Number.isFinite(maxVisible) ? Math.max(3, Math.min(20, Math.floor(maxVisible))) : 5;\n\t}\n\n\t/** Set of currently valid paste IDs, for marker-aware segmentation. */\n\tprivate validPasteIds(): Set<number> {\n\t\treturn new Set(this.pastes.keys());\n\t}\n\n\t/** Segment text with paste-marker awareness, only merging markers with valid IDs. */\n\tprivate segment(text: string, mode: \"word\" | \"grapheme\"): Iterable<Intl.SegmentData> {\n\t\treturn segmentWithMarkers(text, mode === \"word\" ? wordSegmenter : graphemeSegmenter, this.validPasteIds());\n\t}\n\n\tgetPaddingX(): number {\n\t\treturn this.paddingX;\n\t}\n\n\tsetPaddingX(padding: number): void {\n\t\tconst newPadding = Number.isFinite(padding) ? Math.max(0, Math.floor(padding)) : 0;\n\t\tif (this.paddingX !== newPadding) {\n\t\t\tthis.paddingX = newPadding;\n\t\t\tthis.tui.requestRender();\n\t\t}\n\t}\n\n\tgetAutocompleteMaxVisible(): number {\n\t\treturn this.autocompleteMaxVisible;\n\t}\n\n\tsetAutocompleteMaxVisible(maxVisible: number): void {\n\t\tconst newMaxVisible = Number.isFinite(maxVisible) ? Math.max(3, Math.min(20, Math.floor(maxVisible))) : 5;\n\t\tif (this.autocompleteMaxVisible !== newMaxVisible) {\n\t\t\tthis.autocompleteMaxVisible = newMaxVisible;\n\t\t\tthis.tui.requestRender();\n\t\t}\n\t}\n\n\tsetAutocompleteProvider(provider: AutocompleteProvider): void {\n\t\tthis.cancelAutocomplete();\n\t\tthis.autocompleteProvider = provider;\n\t\tthis.setAutocompleteTriggerCharacters(provider.triggerCharacters ?? []);\n\t}\n\n\t/**\n\t * Add a prompt to history for up/down arrow navigation.\n\t * Called after successful submission.\n\t */\n\taddToHistory(text: string): void {\n\t\tconst trimmed = text.trim();\n\t\tif (!trimmed) return;\n\t\t// Don't add consecutive duplicates\n\t\tif (this.history.length > 0 && this.history[0] === trimmed) return;\n\t\tthis.history.unshift(trimmed);\n\t\t// Limit history size\n\t\tif (this.history.length > 100) {\n\t\t\tthis.history.pop();\n\t\t}\n\t}\n\n\tprivate isEditorEmpty(): boolean {\n\t\treturn this.state.lines.length === 1 && this.state.lines[0] === \"\";\n\t}\n\n\tprivate isOnFirstVisualLine(): boolean {\n\t\tconst visualLines = this.buildVisualLineMap(this.lastWidth);\n\t\tconst currentVisualLine = this.findCurrentVisualLine(visualLines);\n\t\treturn currentVisualLine === 0;\n\t}\n\n\tprivate isOnLastVisualLine(): boolean {\n\t\tconst visualLines = this.buildVisualLineMap(this.lastWidth);\n\t\tconst currentVisualLine = this.findCurrentVisualLine(visualLines);\n\t\treturn currentVisualLine === visualLines.length - 1;\n\t}\n\n\tprivate navigateHistory(direction: 1 | -1): void {\n\t\tthis.lastAction = null;\n\t\tif (this.history.length === 0) return;\n\n\t\tconst newIndex = this.historyIndex - direction; // Up(-1) increases index, Down(1) decreases\n\t\tif (newIndex < -1 || newIndex >= this.history.length) return;\n\n\t\t// Capture state when first entering history browsing mode\n\t\tif (this.historyIndex === -1 && newIndex >= 0) {\n\t\t\tthis.pushUndoSnapshot();\n\t\t\tthis.historyDraft = structuredClone(this.state);\n\t\t}\n\n\t\tthis.historyIndex = newIndex;\n\n\t\tif (this.historyIndex === -1) {\n\t\t\tconst draft = this.historyDraft;\n\t\t\tthis.historyDraft = null;\n\t\t\tif (draft) {\n\t\t\t\tthis.state = draft;\n\t\t\t\tthis.preferredVisualCol = null;\n\t\t\t\tthis.snappedFromCursorCol = null;\n\t\t\t\tthis.scrollOffset = 0;\n\t\t\t\tif (this.onChange) this.onChange(this.getText());\n\t\t\t} else {\n\t\t\t\tthis.setTextInternal(\"\");\n\t\t\t}\n\t\t} else {\n\t\t\tthis.setTextInternal(this.history[this.historyIndex] || \"\", direction === -1 ? \"start\" : \"end\");\n\t\t}\n\t}\n\n\tprivate exitHistoryBrowsing(): void {\n\t\tthis.historyIndex = -1;\n\t\tthis.historyDraft = null;\n\t}\n\n\t/** Internal setText that doesn't reset history state - used by navigateHistory */\n\tprivate setTextInternal(text: string, cursorPlacement: \"start\" | \"end\" = \"end\"): void {\n\t\tconst lines = text.split(\"\\n\");\n\t\tthis.state.lines = lines.length === 0 ? [\"\"] : lines;\n\t\tthis.state.cursorLine = cursorPlacement === \"start\" ? 0 : this.state.lines.length - 1;\n\t\tthis.setCursorCol(cursorPlacement === \"start\" ? 0 : this.state.lines[this.state.cursorLine]?.length || 0);\n\t\t// Reset scroll - render() will adjust to show cursor\n\t\tthis.scrollOffset = 0;\n\n\t\tif (this.onChange) {\n\t\t\tthis.onChange(this.getText());\n\t\t}\n\t}\n\n\tinvalidate(): void {\n\t\t// No cached state to invalidate currently\n\t}\n\n\trender(width: number): string[] {\n\t\tconst maxPadding = Math.max(0, Math.floor((width - 1) / 2));\n\t\tconst paddingX = Math.min(this.paddingX, maxPadding);\n\t\tconst contentWidth = Math.max(1, width - paddingX * 2);\n\n\t\t// Layout width: with padding the cursor can overflow into it,\n\t\t// without padding we reserve 1 column for the cursor.\n\t\tconst layoutWidth = Math.max(1, contentWidth - (paddingX ? 0 : 1));\n\n\t\t// Store for cursor navigation (must match wrapping width)\n\t\tthis.lastWidth = layoutWidth;\n\n\t\tconst horizontal = this.borderColor(\"─\");\n\n\t\t// Layout the text\n\t\tconst layoutLines = this.layoutText(layoutWidth);\n\n\t\t// Calculate max visible lines: 30% of terminal height, minimum 5 lines\n\t\tconst terminalRows = this.tui.terminal.rows;\n\t\tconst maxVisibleLines = Math.max(5, Math.floor(terminalRows * 0.3));\n\n\t\t// Find the cursor line index in layoutLines\n\t\tlet cursorLineIndex = layoutLines.findIndex((line) => line.hasCursor);\n\t\tif (cursorLineIndex === -1) cursorLineIndex = 0;\n\n\t\t// Adjust scroll offset to keep cursor visible\n\t\tif (cursorLineIndex < this.scrollOffset) {\n\t\t\tthis.scrollOffset = cursorLineIndex;\n\t\t} else if (cursorLineIndex >= this.scrollOffset + maxVisibleLines) {\n\t\t\tthis.scrollOffset = cursorLineIndex - maxVisibleLines + 1;\n\t\t}\n\n\t\t// Clamp scroll offset to valid range\n\t\tconst maxScrollOffset = Math.max(0, layoutLines.length - maxVisibleLines);\n\t\tthis.scrollOffset = Math.max(0, Math.min(this.scrollOffset, maxScrollOffset));\n\n\t\t// Get visible lines slice\n\t\tconst visibleLines = layoutLines.slice(this.scrollOffset, this.scrollOffset + maxVisibleLines);\n\n\t\tconst result: string[] = [];\n\t\tconst leftPadding = \" \".repeat(paddingX);\n\t\tconst rightPadding = leftPadding;\n\n\t\t// Render top border (with scroll indicator if scrolled down)\n\t\tif (this.scrollOffset > 0) {\n\t\t\tconst indicator = `─── ↑ ${this.scrollOffset} more `;\n\t\t\tconst remaining = width - visibleWidth(indicator);\n\t\t\tif (remaining >= 0) {\n\t\t\t\tresult.push(this.borderColor(indicator + \"─\".repeat(remaining)));\n\t\t\t} else {\n\t\t\t\tresult.push(this.borderColor(truncateToWidth(indicator, width)));\n\t\t\t}\n\t\t} else {\n\t\t\tresult.push(horizontal.repeat(width));\n\t\t}\n\n\t\t// Render each visible layout line\n\t\t// Emit hardware cursor marker when focused so TUI can position the\n\t\t// hardware cursor for IME candidate-window placement even while\n\t\t// autocomplete (e.g. slash-command menu) is visible.\n\t\tconst emitCursorMarker = this.focused;\n\n\t\tfor (const layoutLine of visibleLines) {\n\t\t\tlet displayText = layoutLine.text;\n\t\t\tlet lineVisibleWidth = visibleWidth(layoutLine.text);\n\t\t\tlet cursorInPadding = false;\n\n\t\t\t// Add cursor if this line has it\n\t\t\tif (layoutLine.hasCursor && layoutLine.cursorPos !== undefined) {\n\t\t\t\tconst before = displayText.slice(0, layoutLine.cursorPos);\n\t\t\t\tconst after = displayText.slice(layoutLine.cursorPos);\n\n\t\t\t\t// Hardware cursor marker (zero-width, emitted before fake cursor for IME positioning)\n\t\t\t\tconst marker = emitCursorMarker ? CURSOR_MARKER : \"\";\n\n\t\t\t\tif (after.length > 0) {\n\t\t\t\t\t// Cursor is on a character (grapheme) - replace it with highlighted version\n\t\t\t\t\t// Get the first grapheme from 'after'\n\t\t\t\t\tconst afterGraphemes = [...this.segment(after, \"grapheme\")];\n\t\t\t\t\tconst firstGrapheme = afterGraphemes[0]?.segment || \"\";\n\t\t\t\t\tconst restAfter = after.slice(firstGrapheme.length);\n\t\t\t\t\tconst cursor = `\\x1b[7m${firstGrapheme}\\x1b[0m`;\n\t\t\t\t\tdisplayText = before + marker + cursor + restAfter;\n\t\t\t\t\t// lineVisibleWidth stays the same - we're replacing, not adding\n\t\t\t\t} else {\n\t\t\t\t\t// Cursor is at the end - add highlighted space\n\t\t\t\t\tconst cursor = \"\\x1b[7m \\x1b[0m\";\n\t\t\t\t\tdisplayText = before + marker + cursor;\n\t\t\t\t\tlineVisibleWidth = lineVisibleWidth + 1;\n\t\t\t\t\t// If cursor overflows content width into the padding, flag it\n\t\t\t\t\tif (lineVisibleWidth > contentWidth && paddingX > 0) {\n\t\t\t\t\t\tcursorInPadding = true;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Calculate padding based on actual visible width\n\t\t\tconst padding = \" \".repeat(Math.max(0, contentWidth - lineVisibleWidth));\n\t\t\tconst lineRightPadding = cursorInPadding ? rightPadding.slice(1) : rightPadding;\n\n\t\t\t// Render the line (no side borders, just horizontal lines above and below)\n\t\t\tresult.push(`${leftPadding}${displayText}${padding}${lineRightPadding}`);\n\t\t}\n\n\t\t// Render bottom border (with scroll indicator if more content below)\n\t\tconst linesBelow = layoutLines.length - (this.scrollOffset + visibleLines.length);\n\t\tif (linesBelow > 0) {\n\t\t\tconst indicator = `─── ↓ ${linesBelow} more `;\n\t\t\tconst remaining = width - visibleWidth(indicator);\n\t\t\tresult.push(this.borderColor(indicator + \"─\".repeat(Math.max(0, remaining))));\n\t\t} else {\n\t\t\tresult.push(horizontal.repeat(width));\n\t\t}\n\n\t\t// Add autocomplete list if active\n\t\tif (this.autocompleteState && this.autocompleteList) {\n\t\t\tconst autocompleteResult = this.autocompleteList.render(contentWidth);\n\t\t\tfor (const line of autocompleteResult) {\n\t\t\t\tconst lineWidth = visibleWidth(line);\n\t\t\t\tconst linePadding = \" \".repeat(Math.max(0, contentWidth - lineWidth));\n\t\t\t\tresult.push(`${leftPadding}${line}${linePadding}${rightPadding}`);\n\t\t\t}\n\t\t}\n\n\t\treturn result;\n\t}\n\n\thandleInput(data: string): void {\n\t\tconst kb = getKeybindings();\n\n\t\t// Handle character jump mode (awaiting next character to jump to)\n\t\tif (this.jumpMode !== null) {\n\t\t\t// Cancel if the hotkey is pressed again\n\t\t\tif (kb.matches(data, \"tui.editor.jumpForward\") || kb.matches(data, \"tui.editor.jumpBackward\")) {\n\t\t\t\tthis.jumpMode = null;\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst printable = decodePrintableKey(data) ?? (data.charCodeAt(0) >= 32 ? data : undefined);\n\t\t\tif (printable !== undefined) {\n\t\t\t\t// Printable character - perform the jump\n\t\t\t\tconst direction = this.jumpMode;\n\t\t\t\tthis.jumpMode = null;\n\t\t\t\tthis.jumpToChar(printable, direction);\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// Control character - cancel and fall through to normal handling\n\t\t\tthis.jumpMode = null;\n\t\t}\n\n\t\t// Handle bracketed paste mode\n\t\tif (data.includes(\"\\x1b[200~\")) {\n\t\t\tthis.isInPaste = true;\n\t\t\tthis.pasteBuffer = \"\";\n\t\t\tdata = data.replace(\"\\x1b[200~\", \"\");\n\t\t}\n\n\t\tif (this.isInPaste) {\n\t\t\tthis.pasteBuffer += data;\n\t\t\tconst endIndex = this.pasteBuffer.indexOf(\"\\x1b[201~\");\n\t\t\tif (endIndex !== -1) {\n\t\t\t\tconst pasteContent = this.pasteBuffer.substring(0, endIndex);\n\t\t\t\tif (pasteContent.length > 0) {\n\t\t\t\t\tthis.handlePaste(pasteContent);\n\t\t\t\t}\n\t\t\t\tthis.isInPaste = false;\n\t\t\t\tconst remaining = this.pasteBuffer.substring(endIndex + 6);\n\t\t\t\tthis.pasteBuffer = \"\";\n\t\t\t\tif (remaining.length > 0) {\n\t\t\t\t\tthis.handleInput(remaining);\n\t\t\t\t}\n\t\t\t\treturn;\n\t\t\t}\n\t\t\treturn;\n\t\t}\n\n\t\t// Ctrl+C - let parent handle (exit/clear)\n\t\tif (kb.matches(data, \"tui.input.copy\")) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Undo\n\t\tif (kb.matches(data, \"tui.editor.undo\")) {\n\t\t\tthis.undo();\n\t\t\treturn;\n\t\t}\n\n\t\t// Handle autocomplete mode\n\t\tif (this.autocompleteState && this.autocompleteList) {\n\t\t\tif (kb.matches(data, \"tui.select.cancel\")) {\n\t\t\t\tthis.cancelAutocomplete();\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tif (kb.matches(data, \"tui.select.up\") || kb.matches(data, \"tui.select.down\")) {\n\t\t\t\tthis.autocompleteList.handleInput(data);\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tif (kb.matches(data, \"tui.input.tab\")) {\n\t\t\t\tconst selected = this.autocompleteList.getSelectedItem();\n\t\t\t\tif (selected && this.autocompleteProvider) {\n\t\t\t\t\tthis.pushUndoSnapshot();\n\t\t\t\t\tthis.lastAction = null;\n\t\t\t\t\tconst result = this.autocompleteProvider.applyCompletion(\n\t\t\t\t\t\tthis.state.lines,\n\t\t\t\t\t\tthis.state.cursorLine,\n\t\t\t\t\t\tthis.state.cursorCol,\n\t\t\t\t\t\tselected,\n\t\t\t\t\t\tthis.autocompletePrefix,\n\t\t\t\t\t);\n\t\t\t\t\tthis.state.lines = result.lines;\n\t\t\t\t\tthis.state.cursorLine = result.cursorLine;\n\t\t\t\t\tthis.setCursorCol(result.cursorCol);\n\t\t\t\t\tthis.cancelAutocomplete();\n\t\t\t\t\tif (this.onChange) this.onChange(this.getText());\n\t\t\t\t}\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tif (kb.matches(data, \"tui.select.confirm\")) {\n\t\t\t\tconst selected = this.autocompleteList.getSelectedItem();\n\t\t\t\tif (selected && this.autocompleteProvider) {\n\t\t\t\t\tthis.pushUndoSnapshot();\n\t\t\t\t\tthis.lastAction = null;\n\t\t\t\t\tconst result = this.autocompleteProvider.applyCompletion(\n\t\t\t\t\t\tthis.state.lines,\n\t\t\t\t\t\tthis.state.cursorLine,\n\t\t\t\t\t\tthis.state.cursorCol,\n\t\t\t\t\t\tselected,\n\t\t\t\t\t\tthis.autocompletePrefix,\n\t\t\t\t\t);\n\t\t\t\t\tthis.state.lines = result.lines;\n\t\t\t\t\tthis.state.cursorLine = result.cursorLine;\n\t\t\t\t\tthis.setCursorCol(result.cursorCol);\n\n\t\t\t\t\tif (this.autocompletePrefix.startsWith(\"/\")) {\n\t\t\t\t\t\tthis.cancelAutocomplete();\n\t\t\t\t\t\t// Fall through to submit\n\t\t\t\t\t} else {\n\t\t\t\t\t\tthis.cancelAutocomplete();\n\t\t\t\t\t\tif (this.onChange) this.onChange(this.getText());\n\t\t\t\t\t\treturn;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// Tab - trigger completion\n\t\tif (kb.matches(data, \"tui.input.tab\") && !this.autocompleteState) {\n\t\t\tthis.handleTabCompletion();\n\t\t\treturn;\n\t\t}\n\n\t\t// Deletion actions\n\t\tif (kb.matches(data, \"tui.editor.deleteToLineEnd\")) {\n\t\t\tthis.deleteToEndOfLine();\n\t\t\treturn;\n\t\t}\n\t\tif (kb.matches(data, \"tui.editor.deleteToLineStart\")) {\n\t\t\tthis.deleteToStartOfLine();\n\t\t\treturn;\n\t\t}\n\t\tif (kb.matches(data, \"tui.editor.deleteWordBackward\")) {\n\t\t\tthis.deleteWordBackwards();\n\t\t\treturn;\n\t\t}\n\t\tif (kb.matches(data, \"tui.editor.deleteWordForward\")) {\n\t\t\tthis.deleteWordForward();\n\t\t\treturn;\n\t\t}\n\t\tif (kb.matches(data, \"tui.editor.deleteCharBackward\") || matchesKey(data, \"shift+backspace\")) {\n\t\t\tthis.handleBackspace();\n\t\t\treturn;\n\t\t}\n\t\tif (kb.matches(data, \"tui.editor.deleteCharForward\") || matchesKey(data, \"shift+delete\")) {\n\t\t\tthis.handleForwardDelete();\n\t\t\treturn;\n\t\t}\n\n\t\t// Kill ring actions\n\t\tif (kb.matches(data, \"tui.editor.yank\")) {\n\t\t\tthis.yank();\n\t\t\treturn;\n\t\t}\n\t\tif (kb.matches(data, \"tui.editor.yankPop\")) {\n\t\t\tthis.yankPop();\n\t\t\treturn;\n\t\t}\n\n\t\t// Cursor movement actions\n\t\tif (kb.matches(data, \"tui.editor.cursorLineStart\")) {\n\t\t\tthis.moveToLineStart();\n\t\t\treturn;\n\t\t}\n\t\tif (kb.matches(data, \"tui.editor.cursorLineEnd\")) {\n\t\t\tthis.moveToLineEnd();\n\t\t\treturn;\n\t\t}\n\t\tif (kb.matches(data, \"tui.editor.cursorWordLeft\")) {\n\t\t\tthis.moveWordBackwards();\n\t\t\treturn;\n\t\t}\n\t\tif (kb.matches(data, \"tui.editor.cursorWordRight\")) {\n\t\t\tthis.moveWordForwards();\n\t\t\treturn;\n\t\t}\n\n\t\t// New line\n\t\tif (\n\t\t\tkb.matches(data, \"tui.input.newLine\") ||\n\t\t\t(data.charCodeAt(0) === 10 && data.length > 1) ||\n\t\t\tdata === \"\\x1b\\r\" ||\n\t\t\tdata === \"\\x1b[13;2~\" ||\n\t\t\t(data.length > 1 && data.includes(\"\\x1b\") && data.includes(\"\\r\")) ||\n\t\t\t(data === \"\\n\" && data.length === 1)\n\t\t) {\n\t\t\tif (this.shouldSubmitOnBackslashEnter(data, kb)) {\n\t\t\t\tthis.handleBackspace();\n\t\t\t\tthis.submitValue();\n\t\t\t\treturn;\n\t\t\t}\n\t\t\tthis.addNewLine();\n\t\t\treturn;\n\t\t}\n\n\t\t// Submit (Enter)\n\t\tif (kb.matches(data, \"tui.input.submit\")) {\n\t\t\tif (this.disableSubmit) return;\n\n\t\t\t// Workaround for terminals without Shift+Enter support:\n\t\t\t// If char before cursor is \\, delete it and insert newline instead of submitting.\n\t\t\tconst currentLine = this.state.lines[this.state.cursorLine] || \"\";\n\t\t\tif (this.state.cursorCol > 0 && currentLine[this.state.cursorCol - 1] === \"\\\\\") {\n\t\t\t\tthis.handleBackspace();\n\t\t\t\tthis.addNewLine();\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tthis.submitValue();\n\t\t\treturn;\n\t\t}\n\n\t\t// Arrow key navigation (with history support)\n\t\tif (kb.matches(data, \"tui.editor.cursorUp\")) {\n\t\t\tif (\n\t\t\t\tthis.isOnFirstVisualLine() &&\n\t\t\t\t(this.isEditorEmpty() || this.historyIndex > -1 || this.state.cursorCol === 0)\n\t\t\t) {\n\t\t\t\tthis.navigateHistory(-1);\n\t\t\t} else if (this.isOnFirstVisualLine()) {\n\t\t\t\t// Already at top - jump to start of line\n\t\t\t\tthis.moveToLineStart();\n\t\t\t} else {\n\t\t\t\tthis.moveCursor(-1, 0);\n\t\t\t}\n\t\t\treturn;\n\t\t}\n\t\tif (kb.matches(data, \"tui.editor.cursorDown\")) {\n\t\t\tif (this.historyIndex > -1 && this.isOnLastVisualLine()) {\n\t\t\t\tthis.navigateHistory(1);\n\t\t\t} else if (this.isOnLastVisualLine()) {\n\t\t\t\t// Already at bottom - jump to end of line\n\t\t\t\tthis.moveToLineEnd();\n\t\t\t} else {\n\t\t\t\tthis.moveCursor(1, 0);\n\t\t\t}\n\t\t\treturn;\n\t\t}\n\t\tif (kb.matches(data, \"tui.editor.cursorRight\")) {\n\t\t\tthis.moveCursor(0, 1);\n\t\t\treturn;\n\t\t}\n\t\tif (kb.matches(data, \"tui.editor.cursorLeft\")) {\n\t\t\tthis.moveCursor(0, -1);\n\t\t\treturn;\n\t\t}\n\n\t\t// Page up/down - scroll by page and move cursor\n\t\tif (kb.matches(data, \"tui.editor.pageUp\")) {\n\t\t\tthis.pageScroll(-1);\n\t\t\treturn;\n\t\t}\n\t\tif (kb.matches(data, \"tui.editor.pageDown\")) {\n\t\t\tthis.pageScroll(1);\n\t\t\treturn;\n\t\t}\n\n\t\t// Character jump mode triggers\n\t\tif (kb.matches(data, \"tui.editor.jumpForward\")) {\n\t\t\tthis.jumpMode = \"forward\";\n\t\t\treturn;\n\t\t}\n\t\tif (kb.matches(data, \"tui.editor.jumpBackward\")) {\n\t\t\tthis.jumpMode = \"backward\";\n\t\t\treturn;\n\t\t}\n\n\t\t// Shift+Space - insert regular space\n\t\tif (matchesKey(data, \"shift+space\")) {\n\t\t\tthis.insertCharacter(\" \");\n\t\t\treturn;\n\t\t}\n\n\t\tconst printable = decodePrintableKey(data);\n\t\tif (printable !== undefined) {\n\t\t\tthis.insertCharacter(printable);\n\t\t\treturn;\n\t\t}\n\n\t\t// Regular characters\n\t\tif (data.charCodeAt(0) >= 32) {\n\t\t\tthis.insertCharacter(data);\n\t\t}\n\t}\n\n\tprivate layoutText(contentWidth: number): LayoutLine[] {\n\t\tconst layoutLines: LayoutLine[] = [];\n\n\t\tif (this.state.lines.length === 0 || (this.state.lines.length === 1 && this.state.lines[0] === \"\")) {\n\t\t\t// Empty editor\n\t\t\tlayoutLines.push({\n\t\t\t\ttext: \"\",\n\t\t\t\thasCursor: true,\n\t\t\t\tcursorPos: 0,\n\t\t\t});\n\t\t\treturn layoutLines;\n\t\t}\n\n\t\t// Process each logical line\n\t\tfor (let i = 0; i < this.state.lines.length; i++) {\n\t\t\tconst line = this.state.lines[i] || \"\";\n\t\t\tconst isCurrentLine = i === this.state.cursorLine;\n\t\t\tconst lineVisibleWidth = visibleWidth(line);\n\n\t\t\tif (lineVisibleWidth <= contentWidth) {\n\t\t\t\t// Line fits in one layout line\n\t\t\t\tif (isCurrentLine) {\n\t\t\t\t\tlayoutLines.push({\n\t\t\t\t\t\ttext: line,\n\t\t\t\t\t\thasCursor: true,\n\t\t\t\t\t\tcursorPos: this.state.cursorCol,\n\t\t\t\t\t});\n\t\t\t\t} else {\n\t\t\t\t\tlayoutLines.push({\n\t\t\t\t\t\ttext: line,\n\t\t\t\t\t\thasCursor: false,\n\t\t\t\t\t});\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\t// Line needs wrapping - use word-aware wrapping\n\t\t\t\tconst chunks = wordWrapLine(line, contentWidth, [...this.segment(line, \"grapheme\")]);\n\n\t\t\t\tfor (let chunkIndex = 0; chunkIndex < chunks.length; chunkIndex++) {\n\t\t\t\t\tconst chunk = chunks[chunkIndex];\n\t\t\t\t\tif (!chunk) continue;\n\n\t\t\t\t\tconst cursorPos = this.state.cursorCol;\n\t\t\t\t\tconst isLastChunk = chunkIndex === chunks.length - 1;\n\n\t\t\t\t\t// Determine if cursor is in this chunk\n\t\t\t\t\t// For word-wrapped chunks, we need to handle the case where\n\t\t\t\t\t// cursor might be in trimmed whitespace at end of chunk\n\t\t\t\t\tlet hasCursorInChunk = false;\n\t\t\t\t\tlet adjustedCursorPos = 0;\n\n\t\t\t\t\tif (isCurrentLine) {\n\t\t\t\t\t\tif (isLastChunk) {\n\t\t\t\t\t\t\t// Last chunk: cursor belongs here if >= startIndex\n\t\t\t\t\t\t\thasCursorInChunk = cursorPos >= chunk.startIndex;\n\t\t\t\t\t\t\tadjustedCursorPos = cursorPos - chunk.startIndex;\n\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\t// Non-last chunk: cursor belongs here if in range [startIndex, endIndex)\n\t\t\t\t\t\t\t// But we need to handle the visual position in the trimmed text\n\t\t\t\t\t\t\thasCursorInChunk = cursorPos >= chunk.startIndex && cursorPos < chunk.endIndex;\n\t\t\t\t\t\t\tif (hasCursorInChunk) {\n\t\t\t\t\t\t\t\tadjustedCursorPos = cursorPos - chunk.startIndex;\n\t\t\t\t\t\t\t\t// Clamp to text length (in case cursor was in trimmed whitespace)\n\t\t\t\t\t\t\t\tif (adjustedCursorPos > chunk.text.length) {\n\t\t\t\t\t\t\t\t\tadjustedCursorPos = chunk.text.length;\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\n\t\t\t\t\tif (hasCursorInChunk) {\n\t\t\t\t\t\tlayoutLines.push({\n\t\t\t\t\t\t\ttext: chunk.text,\n\t\t\t\t\t\t\thasCursor: true,\n\t\t\t\t\t\t\tcursorPos: adjustedCursorPos,\n\t\t\t\t\t\t});\n\t\t\t\t\t} else {\n\t\t\t\t\t\tlayoutLines.push({\n\t\t\t\t\t\t\ttext: chunk.text,\n\t\t\t\t\t\t\thasCursor: false,\n\t\t\t\t\t\t});\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn layoutLines;\n\t}\n\n\tgetText(): string {\n\t\treturn this.state.lines.join(\"\\n\");\n\t}\n\n\tprivate expandPasteMarkers(text: string): string {\n\t\tlet result = text;\n\t\tfor (const [pasteId, pasteContent] of this.pastes) {\n\t\t\tconst markerRegex = new RegExp(`\\\\[paste #${pasteId}( (\\\\+\\\\d+ lines|\\\\d+ chars))?\\\\]`, \"g\");\n\t\t\tresult = result.replace(markerRegex, () => pasteContent);\n\t\t}\n\t\treturn result;\n\t}\n\n\t/**\n\t * Get text with paste markers expanded to their actual content.\n\t * Use this when you need the full content (e.g., for external editor).\n\t */\n\tgetExpandedText(): string {\n\t\treturn this.expandPasteMarkers(this.state.lines.join(\"\\n\"));\n\t}\n\n\tgetLines(): string[] {\n\t\treturn [...this.state.lines];\n\t}\n\n\tgetCursor(): { line: number; col: number } {\n\t\treturn { line: this.state.cursorLine, col: this.state.cursorCol };\n\t}\n\n\tsetText(text: string): void {\n\t\tthis.cancelAutocomplete();\n\t\tthis.lastAction = null;\n\t\tthis.exitHistoryBrowsing();\n\t\tconst normalized = this.normalizeText(text);\n\t\t// Push undo snapshot if content differs (makes programmatic changes undoable)\n\t\tif (this.getText() !== normalized) {\n\t\t\tthis.pushUndoSnapshot();\n\t\t}\n\t\tthis.setTextInternal(normalized);\n\t}\n\n\t/**\n\t * Insert text at the current cursor position.\n\t * Used for programmatic insertion (e.g., clipboard image markers).\n\t * This is atomic for undo - single undo restores entire pre-insert state.\n\t */\n\tinsertTextAtCursor(text: string): void {\n\t\tif (!text) return;\n\t\tthis.cancelAutocomplete();\n\t\tthis.pushUndoSnapshot();\n\t\tthis.lastAction = null;\n\t\tthis.exitHistoryBrowsing();\n\t\tthis.insertTextAtCursorInternal(text);\n\t}\n\n\t/**\n\t * Normalize text for editor storage:\n\t * - Normalize line endings (\\r\\n and \\r -> \\n)\n\t * - Expand tabs to 4 spaces\n\t */\n\tprivate normalizeText(text: string): string {\n\t\treturn text.replace(/\\r\\n/g, \"\\n\").replace(/\\r/g, \"\\n\").replace(/\\t/g, \"    \");\n\t}\n\n\t/**\n\t * Internal text insertion at cursor. Handles single and multi-line text.\n\t * Does not push undo snapshots or trigger autocomplete - caller is responsible.\n\t * Normalizes line endings and calls onChange once at the end.\n\t */\n\tprivate insertTextAtCursorInternal(text: string): void {\n\t\tif (!text) return;\n\n\t\t// Normalize line endings and tabs\n\t\tconst normalized = this.normalizeText(text);\n\t\tconst insertedLines = normalized.split(\"\\n\");\n\n\t\tconst currentLine = this.state.lines[this.state.cursorLine] || \"\";\n\t\tconst beforeCursor = currentLine.slice(0, this.state.cursorCol);\n\t\tconst afterCursor = currentLine.slice(this.state.cursorCol);\n\n\t\tif (insertedLines.length === 1) {\n\t\t\t// Single line - insert at cursor position\n\t\t\tthis.state.lines[this.state.cursorLine] = beforeCursor + normalized + afterCursor;\n\t\t\tthis.setCursorCol(this.state.cursorCol + normalized.length);\n\t\t} else {\n\t\t\t// Multi-line insertion\n\t\t\tthis.state.lines = [\n\t\t\t\t// All lines before current line\n\t\t\t\t...this.state.lines.slice(0, this.state.cursorLine),\n\n\t\t\t\t// The first inserted line merged with text before cursor\n\t\t\t\tbeforeCursor + insertedLines[0],\n\n\t\t\t\t// All middle inserted lines\n\t\t\t\t...insertedLines.slice(1, -1),\n\n\t\t\t\t// The last inserted line with text after cursor\n\t\t\t\tinsertedLines[insertedLines.length - 1] + afterCursor,\n\n\t\t\t\t// All lines after current line\n\t\t\t\t...this.state.lines.slice(this.state.cursorLine + 1),\n\t\t\t];\n\n\t\t\tthis.state.cursorLine += insertedLines.length - 1;\n\t\t\tthis.setCursorCol((insertedLines[insertedLines.length - 1] || \"\").length);\n\t\t}\n\n\t\tif (this.onChange) {\n\t\t\tthis.onChange(this.getText());\n\t\t}\n\t}\n\n\t// All the editor methods from before...\n\tprivate insertCharacter(char: string, skipUndoCoalescing?: boolean): void {\n\t\tthis.exitHistoryBrowsing();\n\n\t\t// Undo coalescing (fish-style):\n\t\t// - Consecutive word chars coalesce into one undo unit\n\t\t// - Space captures state before itself (so undo removes space+following word together)\n\t\t// - Each space is separately undoable\n\t\t// Skip coalescing when called from atomic operations (e.g., handlePaste)\n\t\tif (!skipUndoCoalescing) {\n\t\t\tif (isWhitespaceChar(char) || this.lastAction !== \"type-word\") {\n\t\t\t\tthis.pushUndoSnapshot();\n\t\t\t}\n\t\t\tthis.lastAction = \"type-word\";\n\t\t}\n\n\t\tconst line = this.state.lines[this.state.cursorLine] || \"\";\n\n\t\tconst before = line.slice(0, this.state.cursorCol);\n\t\tconst after = line.slice(this.state.cursorCol);\n\n\t\tthis.state.lines[this.state.cursorLine] = before + char + after;\n\t\tthis.setCursorCol(this.state.cursorCol + char.length);\n\n\t\tif (this.onChange) {\n\t\t\tthis.onChange(this.getText());\n\t\t}\n\n\t\t// Check if we should trigger or update autocomplete\n\t\tif (!this.autocompleteState) {\n\t\t\t// Auto-trigger for \"/\" at the start of a line (slash commands)\n\t\t\tif (char === \"/\" && this.isAtStartOfMessage()) {\n\t\t\t\tthis.tryTriggerAutocomplete();\n\t\t\t}\n\t\t\t// Auto-trigger for symbol-based completion like @, #, or provider triggers at token boundaries\n\t\t\telse if (this.autocompleteTriggerCharacters.includes(char)) {\n\t\t\t\tconst currentLine = this.state.lines[this.state.cursorLine] || \"\";\n\t\t\t\tconst textBeforeCursor = currentLine.slice(0, this.state.cursorCol);\n\t\t\t\tconst charBeforeSymbol = textBeforeCursor[textBeforeCursor.length - 2];\n\t\t\t\tif (textBeforeCursor.length === 1 || charBeforeSymbol === \" \" || charBeforeSymbol === \"\\t\") {\n\t\t\t\t\tthis.tryTriggerAutocomplete();\n\t\t\t\t}\n\t\t\t}\n\t\t\t// Also auto-trigger when typing letters in a slash command or symbol completion context\n\t\t\telse if (/[a-zA-Z0-9.\\-_]/.test(char)) {\n\t\t\t\tconst currentLine = this.state.lines[this.state.cursorLine] || \"\";\n\t\t\t\tconst textBeforeCursor = currentLine.slice(0, this.state.cursorCol);\n\t\t\t\t// Check if we're in a slash command (with or without space for arguments)\n\t\t\t\tif (this.isInSlashCommandContext(textBeforeCursor)) {\n\t\t\t\t\tthis.tryTriggerAutocomplete();\n\t\t\t\t}\n\t\t\t\t// Check if we're in a symbol-based completion context like @, #, or provider triggers\n\t\t\t\telse if (this.autocompleteTriggerPattern.test(textBeforeCursor)) {\n\t\t\t\t\tthis.tryTriggerAutocomplete();\n\t\t\t\t}\n\t\t\t}\n\t\t} else {\n\t\t\tthis.updateAutocomplete();\n\t\t}\n\t}\n\n\tprivate handlePaste(pastedText: string): void {\n\t\tthis.cancelAutocomplete();\n\t\tthis.exitHistoryBrowsing();\n\t\tthis.lastAction = null;\n\n\t\tthis.pushUndoSnapshot();\n\n\t\t// Some terminals (e.g. tmux popups with extended-keys-format=csi-u) re-encode\n\t\t// control bytes inside bracketed paste as CSI-u Ctrl+<letter> sequences\n\t\t// (ESC [ <codepoint> ; 5 u). Decode those back to their literal byte so the\n\t\t// per-char filter below preserves newlines instead of stripping ESC and\n\t\t// leaking the printable tail (e.g. \"[106;5u\") into the editor.\n\t\tconst decodedText = pastedText.replace(/\\x1b\\[(\\d+);5u/g, (match, code) => {\n\t\t\tconst cp = Number(code);\n\t\t\tif (cp >= 97 && cp <= 122) return String.fromCharCode(cp - 96);\n\t\t\tif (cp >= 65 && cp <= 90) return String.fromCharCode(cp - 64);\n\t\t\treturn match;\n\t\t});\n\n\t\t// Clean the pasted text: normalize line endings, expand tabs\n\t\tconst cleanText = this.normalizeText(decodedText);\n\n\t\t// Filter out non-printable characters except newlines\n\t\tlet filteredText = cleanText\n\t\t\t.split(\"\")\n\t\t\t.filter((char) => char === \"\\n\" || char.charCodeAt(0) >= 32)\n\t\t\t.join(\"\");\n\n\t\t// If pasting a file path (starts with /, ~, or .) and the character before\n\t\t// the cursor is a word character, prepend a space for better readability\n\t\tif (/^[/~.]/.test(filteredText)) {\n\t\t\tconst currentLine = this.state.lines[this.state.cursorLine] || \"\";\n\t\t\tconst charBeforeCursor = this.state.cursorCol > 0 ? currentLine[this.state.cursorCol - 1] : \"\";\n\t\t\tif (charBeforeCursor && /\\w/.test(charBeforeCursor)) {\n\t\t\t\tfilteredText = ` ${filteredText}`;\n\t\t\t}\n\t\t}\n\n\t\t// Split into lines to check for large paste\n\t\tconst pastedLines = filteredText.split(\"\\n\");\n\n\t\t// Check if this is a large paste (> 10 lines or > 1000 characters)\n\t\tconst totalChars = filteredText.length;\n\t\tif (pastedLines.length > 10 || totalChars > 1000) {\n\t\t\t// Store the paste and insert a marker\n\t\t\tthis.pasteCounter++;\n\t\t\tconst pasteId = this.pasteCounter;\n\t\t\tthis.pastes.set(pasteId, filteredText);\n\n\t\t\t// Insert marker like \"[paste #1 +123 lines]\" or \"[paste #1 1234 chars]\"\n\t\t\tconst marker =\n\t\t\t\tpastedLines.length > 10\n\t\t\t\t\t? `[paste #${pasteId} +${pastedLines.length} lines]`\n\t\t\t\t\t: `[paste #${pasteId} ${totalChars} chars]`;\n\t\t\tthis.insertTextAtCursorInternal(marker);\n\t\t\treturn;\n\t\t}\n\n\t\tif (pastedLines.length === 1) {\n\t\t\t// Single line - insert atomically (do not trigger autocomplete during paste)\n\t\t\tthis.insertTextAtCursorInternal(filteredText);\n\t\t\treturn;\n\t\t}\n\n\t\t// Multi-line paste - use direct state manipulation\n\t\tthis.insertTextAtCursorInternal(filteredText);\n\t}\n\n\tprivate addNewLine(): void {\n\t\tthis.cancelAutocomplete();\n\t\tthis.exitHistoryBrowsing();\n\t\tthis.lastAction = null;\n\n\t\tthis.pushUndoSnapshot();\n\n\t\tconst currentLine = this.state.lines[this.state.cursorLine] || \"\";\n\n\t\tconst before = currentLine.slice(0, this.state.cursorCol);\n\t\tconst after = currentLine.slice(this.state.cursorCol);\n\n\t\t// Split current line\n\t\tthis.state.lines[this.state.cursorLine] = before;\n\t\tthis.state.lines.splice(this.state.cursorLine + 1, 0, after);\n\n\t\t// Move cursor to start of new line\n\t\tthis.state.cursorLine++;\n\t\tthis.setCursorCol(0);\n\n\t\tif (this.onChange) {\n\t\t\tthis.onChange(this.getText());\n\t\t}\n\t}\n\n\tprivate shouldSubmitOnBackslashEnter(data: string, kb: ReturnType<typeof getKeybindings>): boolean {\n\t\tif (this.disableSubmit) return false;\n\t\tif (!matchesKey(data, \"enter\")) return false;\n\t\tconst submitKeys = kb.getKeys(\"tui.input.submit\");\n\t\tconst hasShiftEnter = submitKeys.includes(\"shift+enter\") || submitKeys.includes(\"shift+return\");\n\t\tif (!hasShiftEnter) return false;\n\n\t\tconst currentLine = this.state.lines[this.state.cursorLine] || \"\";\n\t\treturn this.state.cursorCol > 0 && currentLine[this.state.cursorCol - 1] === \"\\\\\";\n\t}\n\n\tprivate submitValue(): void {\n\t\tthis.cancelAutocomplete();\n\t\tconst result = this.expandPasteMarkers(this.state.lines.join(\"\\n\")).trim();\n\n\t\tthis.state = { lines: [\"\"], cursorLine: 0, cursorCol: 0 };\n\t\tthis.pastes.clear();\n\t\tthis.pasteCounter = 0;\n\t\tthis.exitHistoryBrowsing();\n\t\tthis.scrollOffset = 0;\n\t\tthis.undoStack.clear();\n\t\tthis.lastAction = null;\n\n\t\tif (this.onChange) this.onChange(\"\");\n\t\tif (this.onSubmit) this.onSubmit(result);\n\t}\n\n\tprivate handleBackspace(): void {\n\t\tthis.exitHistoryBrowsing();\n\t\tthis.lastAction = null;\n\n\t\tif (this.state.cursorCol > 0) {\n\t\t\tthis.pushUndoSnapshot();\n\n\t\t\t// Delete grapheme before cursor (handles emojis, combining characters, etc.)\n\t\t\tconst line = this.state.lines[this.state.cursorLine] || \"\";\n\t\t\tconst beforeCursor = line.slice(0, this.state.cursorCol);\n\n\t\t\t// Find the last grapheme in the text before cursor\n\t\t\tconst graphemes = [...this.segment(beforeCursor, \"grapheme\")];\n\t\t\tconst lastGrapheme = graphemes[graphemes.length - 1];\n\t\t\tconst graphemeLength = lastGrapheme ? lastGrapheme.segment.length : 1;\n\n\t\t\tconst before = line.slice(0, this.state.cursorCol - graphemeLength);\n\t\t\tconst after = line.slice(this.state.cursorCol);\n\n\t\t\tthis.state.lines[this.state.cursorLine] = before + after;\n\t\t\tthis.setCursorCol(this.state.cursorCol - graphemeLength);\n\t\t} else if (this.state.cursorLine > 0) {\n\t\t\tthis.pushUndoSnapshot();\n\n\t\t\t// Merge with previous line\n\t\t\tconst currentLine = this.state.lines[this.state.cursorLine] || \"\";\n\t\t\tconst previousLine = this.state.lines[this.state.cursorLine - 1] || \"\";\n\n\t\t\tthis.state.lines[this.state.cursorLine - 1] = previousLine + currentLine;\n\t\t\tthis.state.lines.splice(this.state.cursorLine, 1);\n\n\t\t\tthis.state.cursorLine--;\n\t\t\tthis.setCursorCol(previousLine.length);\n\t\t}\n\n\t\tif (this.onChange) {\n\t\t\tthis.onChange(this.getText());\n\t\t}\n\n\t\t// Update or re-trigger autocomplete after backspace\n\t\tif (this.autocompleteState) {\n\t\t\tthis.updateAutocomplete();\n\t\t} else {\n\t\t\t// If autocomplete was cancelled (no matches), re-trigger if we're in a completable context\n\t\t\tconst currentLine = this.state.lines[this.state.cursorLine] || \"\";\n\t\t\tconst textBeforeCursor = currentLine.slice(0, this.state.cursorCol);\n\t\t\t// Slash command context\n\t\t\tif (this.isInSlashCommandContext(textBeforeCursor)) {\n\t\t\t\tthis.tryTriggerAutocomplete();\n\t\t\t}\n\t\t\t// Symbol-based completion context like @, #, or provider triggers\n\t\t\telse if (this.autocompleteTriggerPattern.test(textBeforeCursor)) {\n\t\t\t\tthis.tryTriggerAutocomplete();\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Set cursor column and clear preferredVisualCol.\n\t * Use this for all non-vertical cursor movements to reset sticky column behavior.\n\t */\n\tprivate setCursorCol(col: number): void {\n\t\tthis.state.cursorCol = col;\n\t\tthis.preferredVisualCol = null;\n\t\tthis.snappedFromCursorCol = null;\n\t}\n\n\t/**\n\t * Move cursor to a target visual line, applying sticky column logic.\n\t * Shared by moveCursor() and pageScroll().\n\t */\n\tprivate moveToVisualLine(\n\t\tvisualLines: Array<{ logicalLine: number; startCol: number; length: number }>,\n\t\tcurrentVisualLine: number,\n\t\ttargetVisualLine: number,\n\t): void {\n\t\tconst currentVL = visualLines[currentVisualLine];\n\t\tconst targetVL = visualLines[targetVisualLine];\n\t\tif (!(currentVL && targetVL)) return;\n\n\t\t// When the cursor was snapped to a segment start, resolve the pre-snap\n\t\t// position against the VL it belongs to. This gives the correct visual\n\t\t// column even after a resize reshuffles VLs.\n\t\tlet currentVisualCol: number;\n\t\tif (this.snappedFromCursorCol !== null) {\n\t\t\tconst vlIndex = this.findVisualLineAt(visualLines, currentVL.logicalLine, this.snappedFromCursorCol);\n\t\t\tcurrentVisualCol = this.snappedFromCursorCol - visualLines[vlIndex].startCol;\n\t\t} else {\n\t\t\tcurrentVisualCol = this.state.cursorCol - currentVL.startCol;\n\t\t}\n\n\t\t// For non-last segments, clamp to length-1 to stay within the segment\n\t\tconst isLastSourceSegment =\n\t\t\tcurrentVisualLine === visualLines.length - 1 ||\n\t\t\tvisualLines[currentVisualLine + 1]?.logicalLine !== currentVL.logicalLine;\n\t\tconst sourceMaxVisualCol = isLastSourceSegment ? currentVL.length : Math.max(0, currentVL.length - 1);\n\n\t\tconst isLastTargetSegment =\n\t\t\ttargetVisualLine === visualLines.length - 1 ||\n\t\t\tvisualLines[targetVisualLine + 1]?.logicalLine !== targetVL.logicalLine;\n\t\tconst targetMaxVisualCol = isLastTargetSegment ? targetVL.length : Math.max(0, targetVL.length - 1);\n\n\t\tconst moveToVisualCol = this.computeVerticalMoveColumn(currentVisualCol, sourceMaxVisualCol, targetMaxVisualCol);\n\n\t\t// Set cursor position\n\t\tthis.state.cursorLine = targetVL.logicalLine;\n\t\tconst targetCol = targetVL.startCol + moveToVisualCol;\n\t\tconst logicalLine = this.state.lines[targetVL.logicalLine] || \"\";\n\t\tthis.state.cursorCol = Math.min(targetCol, logicalLine.length);\n\n\t\t// Snap cursor to atomic segment boundary (e.g. paste markers)\n\t\t// so the cursor never lands in the middle of a multi-grapheme unit.\n\t\t// Single-grapheme segments don't need snapping.\n\t\tconst segments = [...this.segment(logicalLine, \"grapheme\")];\n\t\tfor (const seg of segments) {\n\t\t\tif (seg.index > this.state.cursorCol) break;\n\t\t\tif (seg.segment.length <= 1) continue;\n\t\t\tif (this.state.cursorCol < seg.index + seg.segment.length) {\n\t\t\t\tconst isContinuation = seg.index < targetVL.startCol;\n\t\t\t\tconst isMovingDown = targetVisualLine > currentVisualLine;\n\n\t\t\t\tif (isContinuation && isMovingDown) {\n\t\t\t\t\t// The segment started on a previous visual line, and we\n\t\t\t\t\t// already visited it on the way down. Skip all remaining\n\t\t\t\t\t// continuation VLs and land on the first VL past it.\n\t\t\t\t\tconst segEnd = seg.index + seg.segment.length;\n\t\t\t\t\tlet next = targetVisualLine + 1;\n\t\t\t\t\twhile (\n\t\t\t\t\t\tnext < visualLines.length &&\n\t\t\t\t\t\tvisualLines[next].logicalLine === targetVL.logicalLine &&\n\t\t\t\t\t\tvisualLines[next].startCol < segEnd\n\t\t\t\t\t) {\n\t\t\t\t\t\tnext++;\n\t\t\t\t\t}\n\t\t\t\t\tif (next < visualLines.length) {\n\t\t\t\t\t\tthis.moveToVisualLine(visualLines, currentVisualLine, next);\n\t\t\t\t\t\treturn;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// Snap to the start of the segment so it gets highlighted.\n\t\t\t\t// Store the pre-snap position so the next vertical move can\n\t\t\t\t// resolve it to the correct visual column.\n\t\t\t\tthis.snappedFromCursorCol = this.state.cursorCol;\n\t\t\t\tthis.state.cursorCol = seg.index;\n\t\t\t\treturn;\n\t\t\t}\n\t\t}\n\n\t\t// No snap occurred – we moved out of the atomic segment.\n\t\tthis.snappedFromCursorCol = null;\n\t}\n\n\t/**\n\t * Compute the target visual column for vertical cursor movement.\n\t * Implements the sticky column decision table:\n\t *\n\t * | P | S | T | U | Scenario                                             | Set Preferred | Move To     |\n\t * |---|---|---|---| ---------------------------------------------------- |---------------|-------------|\n\t * | 0 | * | 0 | - | Start nav, target fits                               | null          | current     |\n\t * | 0 | * | 1 | - | Start nav, target shorter                            | current       | target end  |\n\t * | 1 | 0 | 0 | 0 | Clamped, target fits preferred                       | null          | preferred   |\n\t * | 1 | 0 | 0 | 1 | Clamped, target longer but still can't fit preferred | keep          | target end  |\n\t * | 1 | 0 | 1 | - | Clamped, target even shorter                         | keep          | target end  |\n\t * | 1 | 1 | 0 | - | Rewrapped, target fits current                       | null          | current     |\n\t * | 1 | 1 | 1 | - | Rewrapped, target shorter than current               | current       | target end  |\n\t *\n\t * Where:\n\t * - P = preferred col is set\n\t * - S = cursor in middle of source line (not clamped to end)\n\t * - T = target line shorter than current visual col\n\t * - U = target line shorter than preferred col\n\t */\n\tprivate computeVerticalMoveColumn(\n\t\tcurrentVisualCol: number,\n\t\tsourceMaxVisualCol: number,\n\t\ttargetMaxVisualCol: number,\n\t): number {\n\t\tconst hasPreferred = this.preferredVisualCol !== null; // P\n\t\tconst cursorInMiddle = currentVisualCol < sourceMaxVisualCol; // S\n\t\tconst targetTooShort = targetMaxVisualCol < currentVisualCol; // T\n\n\t\tif (!hasPreferred || cursorInMiddle) {\n\t\t\tif (targetTooShort) {\n\t\t\t\t// Cases 2 and 7\n\t\t\t\tthis.preferredVisualCol = currentVisualCol;\n\t\t\t\treturn targetMaxVisualCol;\n\t\t\t}\n\n\t\t\t// Cases 1 and 6\n\t\t\tthis.preferredVisualCol = null;\n\t\t\treturn currentVisualCol;\n\t\t}\n\n\t\tconst targetCantFitPreferred = targetMaxVisualCol < this.preferredVisualCol!; // U\n\t\tif (targetTooShort || targetCantFitPreferred) {\n\t\t\t// Cases 4 and 5\n\t\t\treturn targetMaxVisualCol;\n\t\t}\n\n\t\t// Case 3\n\t\tconst result = this.preferredVisualCol!;\n\t\tthis.preferredVisualCol = null;\n\t\treturn result;\n\t}\n\n\tprivate moveToLineStart(): void {\n\t\tthis.lastAction = null;\n\t\tthis.setCursorCol(0);\n\t}\n\n\tprivate moveToLineEnd(): void {\n\t\tthis.lastAction = null;\n\t\tconst currentLine = this.state.lines[this.state.cursorLine] || \"\";\n\t\tthis.setCursorCol(currentLine.length);\n\t}\n\n\tprivate deleteToStartOfLine(): void {\n\t\tthis.exitHistoryBrowsing();\n\n\t\tconst currentLine = this.state.lines[this.state.cursorLine] || \"\";\n\n\t\tif (this.state.cursorCol > 0) {\n\t\t\tthis.pushUndoSnapshot();\n\n\t\t\t// Calculate text to be deleted and save to kill ring (backward deletion = prepend)\n\t\t\tconst deletedText = currentLine.slice(0, this.state.cursorCol);\n\t\t\tthis.killRing.push(deletedText, { prepend: true, accumulate: this.lastAction === \"kill\" });\n\t\t\tthis.lastAction = \"kill\";\n\n\t\t\t// Delete from start of line up to cursor\n\t\t\tthis.state.lines[this.state.cursorLine] = currentLine.slice(this.state.cursorCol);\n\t\t\tthis.setCursorCol(0);\n\t\t} else if (this.state.cursorLine > 0) {\n\t\t\tthis.pushUndoSnapshot();\n\n\t\t\t// At start of line - merge with previous line, treating newline as deleted text\n\t\t\tthis.killRing.push(\"\\n\", { prepend: true, accumulate: this.lastAction === \"kill\" });\n\t\t\tthis.lastAction = \"kill\";\n\n\t\t\tconst previousLine = this.state.lines[this.state.cursorLine - 1] || \"\";\n\t\t\tthis.state.lines[this.state.cursorLine - 1] = previousLine + currentLine;\n\t\t\tthis.state.lines.splice(this.state.cursorLine, 1);\n\t\t\tthis.state.cursorLine--;\n\t\t\tthis.setCursorCol(previousLine.length);\n\t\t}\n\n\t\tif (this.onChange) {\n\t\t\tthis.onChange(this.getText());\n\t\t}\n\t}\n\n\tprivate deleteToEndOfLine(): void {\n\t\tthis.exitHistoryBrowsing();\n\n\t\tconst currentLine = this.state.lines[this.state.cursorLine] || \"\";\n\n\t\tif (this.state.cursorCol < currentLine.length) {\n\t\t\tthis.pushUndoSnapshot();\n\n\t\t\t// Calculate text to be deleted and save to kill ring (forward deletion = append)\n\t\t\tconst deletedText = currentLine.slice(this.state.cursorCol);\n\t\t\tthis.killRing.push(deletedText, { prepend: false, accumulate: this.lastAction === \"kill\" });\n\t\t\tthis.lastAction = \"kill\";\n\n\t\t\t// Delete from cursor to end of line\n\t\t\tthis.state.lines[this.state.cursorLine] = currentLine.slice(0, this.state.cursorCol);\n\t\t} else if (this.state.cursorLine < this.state.lines.length - 1) {\n\t\t\tthis.pushUndoSnapshot();\n\n\t\t\t// At end of line - merge with next line, treating newline as deleted text\n\t\t\tthis.killRing.push(\"\\n\", { prepend: false, accumulate: this.lastAction === \"kill\" });\n\t\t\tthis.lastAction = \"kill\";\n\n\t\t\tconst nextLine = this.state.lines[this.state.cursorLine + 1] || \"\";\n\t\t\tthis.state.lines[this.state.cursorLine] = currentLine + nextLine;\n\t\t\tthis.state.lines.splice(this.state.cursorLine + 1, 1);\n\t\t}\n\n\t\tif (this.onChange) {\n\t\t\tthis.onChange(this.getText());\n\t\t}\n\t}\n\n\tprivate deleteWordBackwards(): void {\n\t\tthis.exitHistoryBrowsing();\n\n\t\tconst currentLine = this.state.lines[this.state.cursorLine] || \"\";\n\n\t\t// If at start of line, behave like backspace at column 0 (merge with previous line)\n\t\tif (this.state.cursorCol === 0) {\n\t\t\tif (this.state.cursorLine > 0) {\n\t\t\t\tthis.pushUndoSnapshot();\n\n\t\t\t\t// Treat newline as deleted text (backward deletion = prepend)\n\t\t\t\tthis.killRing.push(\"\\n\", { prepend: true, accumulate: this.lastAction === \"kill\" });\n\t\t\t\tthis.lastAction = \"kill\";\n\n\t\t\t\tconst previousLine = this.state.lines[this.state.cursorLine - 1] || \"\";\n\t\t\t\tthis.state.lines[this.state.cursorLine - 1] = previousLine + currentLine;\n\t\t\t\tthis.state.lines.splice(this.state.cursorLine, 1);\n\t\t\t\tthis.state.cursorLine--;\n\t\t\t\tthis.setCursorCol(previousLine.length);\n\t\t\t}\n\t\t} else {\n\t\t\tthis.pushUndoSnapshot();\n\n\t\t\t// Save lastAction before cursor movement (moveWordBackwards resets it)\n\t\t\tconst wasKill = this.lastAction === \"kill\";\n\n\t\t\tconst oldCursorCol = this.state.cursorCol;\n\t\t\tthis.moveWordBackwards();\n\t\t\tconst deleteFrom = this.state.cursorCol;\n\t\t\tthis.setCursorCol(oldCursorCol);\n\n\t\t\tconst deletedText = currentLine.slice(deleteFrom, this.state.cursorCol);\n\t\t\tthis.killRing.push(deletedText, { prepend: true, accumulate: wasKill });\n\t\t\tthis.lastAction = \"kill\";\n\n\t\t\tthis.state.lines[this.state.cursorLine] =\n\t\t\t\tcurrentLine.slice(0, deleteFrom) + currentLine.slice(this.state.cursorCol);\n\t\t\tthis.setCursorCol(deleteFrom);\n\t\t}\n\n\t\tif (this.onChange) {\n\t\t\tthis.onChange(this.getText());\n\t\t}\n\t}\n\n\tprivate deleteWordForward(): void {\n\t\tthis.exitHistoryBrowsing();\n\n\t\tconst currentLine = this.state.lines[this.state.cursorLine] || \"\";\n\n\t\t// If at end of line, merge with next line (delete the newline)\n\t\tif (this.state.cursorCol >= currentLine.length) {\n\t\t\tif (this.state.cursorLine < this.state.lines.length - 1) {\n\t\t\t\tthis.pushUndoSnapshot();\n\n\t\t\t\t// Treat newline as deleted text (forward deletion = append)\n\t\t\t\tthis.killRing.push(\"\\n\", { prepend: false, accumulate: this.lastAction === \"kill\" });\n\t\t\t\tthis.lastAction = \"kill\";\n\n\t\t\t\tconst nextLine = this.state.lines[this.state.cursorLine + 1] || \"\";\n\t\t\t\tthis.state.lines[this.state.cursorLine] = currentLine + nextLine;\n\t\t\t\tthis.state.lines.splice(this.state.cursorLine + 1, 1);\n\t\t\t}\n\t\t} else {\n\t\t\tthis.pushUndoSnapshot();\n\n\t\t\t// Save lastAction before cursor movement (moveWordForwards resets it)\n\t\t\tconst wasKill = this.lastAction === \"kill\";\n\n\t\t\tconst oldCursorCol = this.state.cursorCol;\n\t\t\tthis.moveWordForwards();\n\t\t\tconst deleteTo = this.state.cursorCol;\n\t\t\tthis.setCursorCol(oldCursorCol);\n\n\t\t\tconst deletedText = currentLine.slice(this.state.cursorCol, deleteTo);\n\t\t\tthis.killRing.push(deletedText, { prepend: false, accumulate: wasKill });\n\t\t\tthis.lastAction = \"kill\";\n\n\t\t\tthis.state.lines[this.state.cursorLine] =\n\t\t\t\tcurrentLine.slice(0, this.state.cursorCol) + currentLine.slice(deleteTo);\n\t\t}\n\n\t\tif (this.onChange) {\n\t\t\tthis.onChange(this.getText());\n\t\t}\n\t}\n\n\tprivate handleForwardDelete(): void {\n\t\tthis.exitHistoryBrowsing();\n\t\tthis.lastAction = null;\n\n\t\tconst currentLine = this.state.lines[this.state.cursorLine] || \"\";\n\n\t\tif (this.state.cursorCol < currentLine.length) {\n\t\t\tthis.pushUndoSnapshot();\n\n\t\t\t// Delete grapheme at cursor position (handles emojis, combining characters, etc.)\n\t\t\tconst afterCursor = currentLine.slice(this.state.cursorCol);\n\n\t\t\t// Find the first grapheme at cursor\n\t\t\tconst graphemes = [...this.segment(afterCursor, \"grapheme\")];\n\t\t\tconst firstGrapheme = graphemes[0];\n\t\t\tconst graphemeLength = firstGrapheme ? firstGrapheme.segment.length : 1;\n\n\t\t\tconst before = currentLine.slice(0, this.state.cursorCol);\n\t\t\tconst after = currentLine.slice(this.state.cursorCol + graphemeLength);\n\t\t\tthis.state.lines[this.state.cursorLine] = before + after;\n\t\t} else if (this.state.cursorLine < this.state.lines.length - 1) {\n\t\t\tthis.pushUndoSnapshot();\n\n\t\t\t// At end of line - merge with next line\n\t\t\tconst nextLine = this.state.lines[this.state.cursorLine + 1] || \"\";\n\t\t\tthis.state.lines[this.state.cursorLine] = currentLine + nextLine;\n\t\t\tthis.state.lines.splice(this.state.cursorLine + 1, 1);\n\t\t}\n\n\t\tif (this.onChange) {\n\t\t\tthis.onChange(this.getText());\n\t\t}\n\n\t\t// Update or re-trigger autocomplete after forward delete\n\t\tif (this.autocompleteState) {\n\t\t\tthis.updateAutocomplete();\n\t\t} else {\n\t\t\tconst currentLine = this.state.lines[this.state.cursorLine] || \"\";\n\t\t\tconst textBeforeCursor = currentLine.slice(0, this.state.cursorCol);\n\t\t\t// Slash command context\n\t\t\tif (this.isInSlashCommandContext(textBeforeCursor)) {\n\t\t\t\tthis.tryTriggerAutocomplete();\n\t\t\t}\n\t\t\t// Symbol-based completion context like @, #, or provider triggers\n\t\t\telse if (this.autocompleteTriggerPattern.test(textBeforeCursor)) {\n\t\t\t\tthis.tryTriggerAutocomplete();\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Build a mapping from visual lines to logical positions.\n\t * Returns an array where each element represents a visual line with:\n\t * - logicalLine: index into this.state.lines\n\t * - startCol: starting column in the logical line\n\t * - length: length of this visual line segment\n\t */\n\tprivate buildVisualLineMap(width: number): Array<{ logicalLine: number; startCol: number; length: number }> {\n\t\tconst visualLines: Array<{ logicalLine: number; startCol: number; length: number }> = [];\n\n\t\tfor (let i = 0; i < this.state.lines.length; i++) {\n\t\t\tconst line = this.state.lines[i] || \"\";\n\t\t\tconst lineVisWidth = visibleWidth(line);\n\t\t\tif (line.length === 0) {\n\t\t\t\t// Empty line still takes one visual line\n\t\t\t\tvisualLines.push({ logicalLine: i, startCol: 0, length: 0 });\n\t\t\t} else if (lineVisWidth <= width) {\n\t\t\t\tvisualLines.push({ logicalLine: i, startCol: 0, length: line.length });\n\t\t\t} else {\n\t\t\t\t// Line needs wrapping - use word-aware wrapping\n\t\t\t\tconst chunks = wordWrapLine(line, width, [...this.segment(line, \"grapheme\")]);\n\t\t\t\tfor (const chunk of chunks) {\n\t\t\t\t\tvisualLines.push({\n\t\t\t\t\t\tlogicalLine: i,\n\t\t\t\t\t\tstartCol: chunk.startIndex,\n\t\t\t\t\t\tlength: chunk.endIndex - chunk.startIndex,\n\t\t\t\t\t});\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn visualLines;\n\t}\n\n\t/**\n\t * Find the visual line index that contains the given logical position.\n\t */\n\tprivate findVisualLineAt(\n\t\tvisualLines: Array<{ logicalLine: number; startCol: number; length: number }>,\n\t\tline: number,\n\t\tcol: number,\n\t): number {\n\t\tfor (let i = 0; i < visualLines.length; i++) {\n\t\t\tconst vl = visualLines[i];\n\t\t\tif (!vl || vl.logicalLine !== line) continue;\n\t\t\tconst offset = col - vl.startCol;\n\t\t\t// Cursor is in this segment if it's within range. For the last\n\t\t\t// segment of a logical line, cursor can be at length (end position)\n\t\t\tconst isLastSegmentOfLine = i === visualLines.length - 1 || visualLines[i + 1]?.logicalLine !== vl.logicalLine;\n\t\t\tif (offset >= 0 && (offset < vl.length || (isLastSegmentOfLine && offset === vl.length))) {\n\t\t\t\treturn i;\n\t\t\t}\n\t\t}\n\t\treturn visualLines.length - 1;\n\t}\n\n\t/**\n\t * Find the visual line index for the current cursor position.\n\t */\n\tprivate findCurrentVisualLine(\n\t\tvisualLines: Array<{ logicalLine: number; startCol: number; length: number }>,\n\t): number {\n\t\treturn this.findVisualLineAt(visualLines, this.state.cursorLine, this.state.cursorCol);\n\t}\n\n\tprivate moveCursor(deltaLine: number, deltaCol: number): void {\n\t\tthis.lastAction = null;\n\t\tconst visualLines = this.buildVisualLineMap(this.lastWidth);\n\t\tconst currentVisualLine = this.findCurrentVisualLine(visualLines);\n\n\t\tif (deltaLine !== 0) {\n\t\t\tconst targetVisualLine = currentVisualLine + deltaLine;\n\n\t\t\tif (targetVisualLine >= 0 && targetVisualLine < visualLines.length) {\n\t\t\t\tthis.moveToVisualLine(visualLines, currentVisualLine, targetVisualLine);\n\t\t\t}\n\t\t}\n\n\t\tif (deltaCol !== 0) {\n\t\t\tconst currentLine = this.state.lines[this.state.cursorLine] || \"\";\n\n\t\t\tif (deltaCol > 0) {\n\t\t\t\t// Moving right - move by one grapheme (handles emojis, combining characters, etc.)\n\t\t\t\tif (this.state.cursorCol < currentLine.length) {\n\t\t\t\t\tconst afterCursor = currentLine.slice(this.state.cursorCol);\n\t\t\t\t\tconst graphemes = [...this.segment(afterCursor, \"grapheme\")];\n\t\t\t\t\tconst firstGrapheme = graphemes[0];\n\t\t\t\t\tthis.setCursorCol(this.state.cursorCol + (firstGrapheme ? firstGrapheme.segment.length : 1));\n\t\t\t\t} else if (this.state.cursorLine < this.state.lines.length - 1) {\n\t\t\t\t\t// Wrap to start of next logical line\n\t\t\t\t\tthis.state.cursorLine++;\n\t\t\t\t\tthis.setCursorCol(0);\n\t\t\t\t} else {\n\t\t\t\t\t// At end of last line - can't move, but set preferredVisualCol for up/down navigation\n\t\t\t\t\tconst currentVL = visualLines[currentVisualLine];\n\t\t\t\t\tif (currentVL) {\n\t\t\t\t\t\tthis.preferredVisualCol = this.state.cursorCol - currentVL.startCol;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\t// Moving left - move by one grapheme (handles emojis, combining characters, etc.)\n\t\t\t\tif (this.state.cursorCol > 0) {\n\t\t\t\t\tconst beforeCursor = currentLine.slice(0, this.state.cursorCol);\n\t\t\t\t\tconst graphemes = [...this.segment(beforeCursor, \"grapheme\")];\n\t\t\t\t\tconst lastGrapheme = graphemes[graphemes.length - 1];\n\t\t\t\t\tthis.setCursorCol(this.state.cursorCol - (lastGrapheme ? lastGrapheme.segment.length : 1));\n\t\t\t\t} else if (this.state.cursorLine > 0) {\n\t\t\t\t\t// Wrap to end of previous logical line\n\t\t\t\t\tthis.state.cursorLine--;\n\t\t\t\t\tconst prevLine = this.state.lines[this.state.cursorLine] || \"\";\n\t\t\t\t\tthis.setCursorCol(prevLine.length);\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// Keep an open autocomplete picker in sync with the new cursor\n\t\t// position: cursor movement changes the text before the cursor, so a\n\t\t// picker computed for the old position is stale. Re-query so it\n\t\t// refreshes — or closes when the new position yields no suggestions —\n\t\t// mirroring insertCharacter()/handleBackspace(). Without this, arrowing\n\t\t// left from `/cmd ` back into the command name leaves the argument\n\t\t// picker showing against a `/cmd` prefix (and a Tab there would\n\t\t// concatenate the stale suggestion onto the partial command name).\n\t\tif (this.autocompleteState) {\n\t\t\tthis.updateAutocomplete();\n\t\t}\n\t}\n\n\t/**\n\t * Scroll by a page (direction: -1 for up, 1 for down).\n\t * Moves cursor by the page size while keeping it in bounds.\n\t */\n\tprivate pageScroll(direction: -1 | 1): void {\n\t\tthis.lastAction = null;\n\t\tconst terminalRows = this.tui.terminal.rows;\n\t\tconst pageSize = Math.max(5, Math.floor(terminalRows * 0.3));\n\n\t\tconst visualLines = this.buildVisualLineMap(this.lastWidth);\n\t\tconst currentVisualLine = this.findCurrentVisualLine(visualLines);\n\t\tconst targetVisualLine = Math.max(0, Math.min(visualLines.length - 1, currentVisualLine + direction * pageSize));\n\n\t\tthis.moveToVisualLine(visualLines, currentVisualLine, targetVisualLine);\n\t}\n\n\tprivate moveWordBackwards(): void {\n\t\tthis.lastAction = null;\n\t\tconst currentLine = this.state.lines[this.state.cursorLine] || \"\";\n\n\t\t// If at start of line, move to end of previous line\n\t\tif (this.state.cursorCol === 0) {\n\t\t\tif (this.state.cursorLine > 0) {\n\t\t\t\tthis.state.cursorLine--;\n\t\t\t\tconst prevLine = this.state.lines[this.state.cursorLine] || \"\";\n\t\t\t\tthis.setCursorCol(prevLine.length);\n\t\t\t}\n\t\t\treturn;\n\t\t}\n\n\t\tthis.setCursorCol(\n\t\t\tfindWordBackward(currentLine, this.state.cursorCol, {\n\t\t\t\tsegment: (text) => this.segment(text, \"word\"),\n\t\t\t\tisAtomicSegment: isPasteMarker,\n\t\t\t}),\n\t\t);\n\t}\n\n\t/**\n\t * Yank (paste) the most recent kill ring entry at cursor position.\n\t */\n\tprivate yank(): void {\n\t\tif (this.killRing.length === 0) return;\n\n\t\tthis.pushUndoSnapshot();\n\n\t\tconst text = this.killRing.peek()!;\n\t\tthis.insertYankedText(text);\n\n\t\tthis.lastAction = \"yank\";\n\t}\n\n\t/**\n\t * Cycle through kill ring (only works immediately after yank or yank-pop).\n\t * Replaces the last yanked text with the previous entry in the ring.\n\t */\n\tprivate yankPop(): void {\n\t\t// Only works if we just yanked and have more than one entry\n\t\tif (this.lastAction !== \"yank\" || this.killRing.length <= 1) return;\n\n\t\tthis.pushUndoSnapshot();\n\n\t\t// Delete the previously yanked text (still at end of ring before rotation)\n\t\tthis.deleteYankedText();\n\n\t\t// Rotate the ring: move end to front\n\t\tthis.killRing.rotate();\n\n\t\t// Insert the new most recent entry (now at end after rotation)\n\t\tconst text = this.killRing.peek()!;\n\t\tthis.insertYankedText(text);\n\n\t\tthis.lastAction = \"yank\";\n\t}\n\n\t/**\n\t * Insert text at cursor position (used by yank operations).\n\t */\n\tprivate insertYankedText(text: string): void {\n\t\tthis.exitHistoryBrowsing();\n\t\tconst lines = text.split(\"\\n\");\n\n\t\tif (lines.length === 1) {\n\t\t\t// Single line - insert at cursor\n\t\t\tconst currentLine = this.state.lines[this.state.cursorLine] || \"\";\n\t\t\tconst before = currentLine.slice(0, this.state.cursorCol);\n\t\t\tconst after = currentLine.slice(this.state.cursorCol);\n\t\t\tthis.state.lines[this.state.cursorLine] = before + text + after;\n\t\t\tthis.setCursorCol(this.state.cursorCol + text.length);\n\t\t} else {\n\t\t\t// Multi-line insert\n\t\t\tconst currentLine = this.state.lines[this.state.cursorLine] || \"\";\n\t\t\tconst before = currentLine.slice(0, this.state.cursorCol);\n\t\t\tconst after = currentLine.slice(this.state.cursorCol);\n\n\t\t\t// First line merges with text before cursor\n\t\t\tthis.state.lines[this.state.cursorLine] = before + (lines[0] || \"\");\n\n\t\t\t// Insert middle lines\n\t\t\tfor (let i = 1; i < lines.length - 1; i++) {\n\t\t\t\tthis.state.lines.splice(this.state.cursorLine + i, 0, lines[i] || \"\");\n\t\t\t}\n\n\t\t\t// Last line merges with text after cursor\n\t\t\tconst lastLineIndex = this.state.cursorLine + lines.length - 1;\n\t\t\tthis.state.lines.splice(lastLineIndex, 0, (lines[lines.length - 1] || \"\") + after);\n\n\t\t\t// Update cursor position\n\t\t\tthis.state.cursorLine = lastLineIndex;\n\t\t\tthis.setCursorCol((lines[lines.length - 1] || \"\").length);\n\t\t}\n\n\t\tif (this.onChange) {\n\t\t\tthis.onChange(this.getText());\n\t\t}\n\t}\n\n\t/**\n\t * Delete the previously yanked text (used by yank-pop).\n\t * The yanked text is derived from killRing[end] since it hasn't been rotated yet.\n\t */\n\tprivate deleteYankedText(): void {\n\t\tconst yankedText = this.killRing.peek();\n\t\tif (!yankedText) return;\n\n\t\tconst yankLines = yankedText.split(\"\\n\");\n\n\t\tif (yankLines.length === 1) {\n\t\t\t// Single line - delete backward from cursor\n\t\t\tconst currentLine = this.state.lines[this.state.cursorLine] || \"\";\n\t\t\tconst deleteLen = yankedText.length;\n\t\t\tconst before = currentLine.slice(0, this.state.cursorCol - deleteLen);\n\t\t\tconst after = currentLine.slice(this.state.cursorCol);\n\t\t\tthis.state.lines[this.state.cursorLine] = before + after;\n\t\t\tthis.setCursorCol(this.state.cursorCol - deleteLen);\n\t\t} else {\n\t\t\t// Multi-line delete - cursor is at end of last yanked line\n\t\t\tconst startLine = this.state.cursorLine - (yankLines.length - 1);\n\t\t\tconst startCol = (this.state.lines[startLine] || \"\").length - (yankLines[0] || \"\").length;\n\n\t\t\t// Get text after cursor on current line\n\t\t\tconst afterCursor = (this.state.lines[this.state.cursorLine] || \"\").slice(this.state.cursorCol);\n\n\t\t\t// Get text before yank start position\n\t\t\tconst beforeYank = (this.state.lines[startLine] || \"\").slice(0, startCol);\n\n\t\t\t// Remove all lines from startLine to cursorLine and replace with merged line\n\t\t\tthis.state.lines.splice(startLine, yankLines.length, beforeYank + afterCursor);\n\n\t\t\t// Update cursor\n\t\t\tthis.state.cursorLine = startLine;\n\t\t\tthis.setCursorCol(startCol);\n\t\t}\n\n\t\tif (this.onChange) {\n\t\t\tthis.onChange(this.getText());\n\t\t}\n\t}\n\n\tprivate pushUndoSnapshot(): void {\n\t\tthis.undoStack.push(this.state);\n\t}\n\n\tprivate undo(): void {\n\t\tthis.exitHistoryBrowsing();\n\t\tconst snapshot = this.undoStack.pop();\n\t\tif (!snapshot) return;\n\t\tObject.assign(this.state, snapshot);\n\t\tthis.lastAction = null;\n\t\tthis.preferredVisualCol = null;\n\t\tif (this.onChange) {\n\t\t\tthis.onChange(this.getText());\n\t\t}\n\t}\n\n\t/**\n\t * Jump to the first occurrence of a character in the specified direction.\n\t * Multi-line search. Case-sensitive. Skips the current cursor position.\n\t */\n\tprivate jumpToChar(char: string, direction: \"forward\" | \"backward\"): void {\n\t\tthis.lastAction = null;\n\t\tconst isForward = direction === \"forward\";\n\t\tconst lines = this.state.lines;\n\n\t\tconst end = isForward ? lines.length : -1;\n\t\tconst step = isForward ? 1 : -1;\n\n\t\tfor (let lineIdx = this.state.cursorLine; lineIdx !== end; lineIdx += step) {\n\t\t\tconst line = lines[lineIdx] || \"\";\n\t\t\tconst isCurrentLine = lineIdx === this.state.cursorLine;\n\n\t\t\t// Current line: start after/before cursor; other lines: search full line\n\t\t\tconst searchFrom = isCurrentLine\n\t\t\t\t? isForward\n\t\t\t\t\t? this.state.cursorCol + 1\n\t\t\t\t\t: this.state.cursorCol - 1\n\t\t\t\t: undefined;\n\n\t\t\tconst idx = isForward ? line.indexOf(char, searchFrom) : line.lastIndexOf(char, searchFrom);\n\n\t\t\tif (idx !== -1) {\n\t\t\t\tthis.state.cursorLine = lineIdx;\n\t\t\t\tthis.setCursorCol(idx);\n\t\t\t\treturn;\n\t\t\t}\n\t\t}\n\t\t// No match found - cursor stays in place\n\t}\n\n\tprivate moveWordForwards(): void {\n\t\tthis.lastAction = null;\n\t\tconst currentLine = this.state.lines[this.state.cursorLine] || \"\";\n\n\t\t// If at end of line, move to start of next line\n\t\tif (this.state.cursorCol >= currentLine.length) {\n\t\t\tif (this.state.cursorLine < this.state.lines.length - 1) {\n\t\t\t\tthis.state.cursorLine++;\n\t\t\t\tthis.setCursorCol(0);\n\t\t\t}\n\t\t\treturn;\n\t\t}\n\n\t\tthis.setCursorCol(\n\t\t\tfindWordForward(currentLine, this.state.cursorCol, {\n\t\t\t\tsegment: (text) => this.segment(text, \"word\"),\n\t\t\t\tisAtomicSegment: isPasteMarker,\n\t\t\t}),\n\t\t);\n\t}\n\n\t// Slash menu only allowed on the first line of the editor\n\tprivate isSlashMenuAllowed(): boolean {\n\t\treturn this.state.cursorLine === 0;\n\t}\n\n\t// Helper method to check if cursor is at start of message (for slash command detection)\n\tprivate isAtStartOfMessage(): boolean {\n\t\tif (!this.isSlashMenuAllowed()) return false;\n\t\tconst currentLine = this.state.lines[this.state.cursorLine] || \"\";\n\t\tconst beforeCursor = currentLine.slice(0, this.state.cursorCol);\n\t\treturn beforeCursor.trim() === \"\" || beforeCursor.trim() === \"/\";\n\t}\n\n\tprivate isInSlashCommandContext(textBeforeCursor: string): boolean {\n\t\treturn this.isSlashMenuAllowed() && textBeforeCursor.trimStart().startsWith(\"/\");\n\t}\n\n\t// Autocomplete methods\n\t/**\n\t * Find the best autocomplete item index for the given prefix.\n\t * Returns -1 if no match is found.\n\t *\n\t * Match priority:\n\t * 1. Exact match (prefix === item.value) -> always selected\n\t * 2. Prefix match -> first item whose value starts with prefix\n\t * 3. No match -> -1 (keep default highlight)\n\t *\n\t * Matching is case-sensitive and checks item.value only.\n\t */\n\tprivate getBestAutocompleteMatchIndex(items: Array<{ value: string; label: string }>, prefix: string): number {\n\t\tif (!prefix) return -1;\n\n\t\tlet firstPrefixIndex = -1;\n\n\t\tfor (let i = 0; i < items.length; i++) {\n\t\t\tconst value = items[i]!.value;\n\t\t\tif (value === prefix) {\n\t\t\t\treturn i; // Exact match always wins\n\t\t\t}\n\t\t\tif (firstPrefixIndex === -1 && value.startsWith(prefix)) {\n\t\t\t\tfirstPrefixIndex = i;\n\t\t\t}\n\t\t}\n\n\t\treturn firstPrefixIndex;\n\t}\n\n\tprivate createAutocompleteList(\n\t\tprefix: string,\n\t\titems: Array<{ value: string; label: string; description?: string }>,\n\t): SelectList {\n\t\tconst layout = prefix.startsWith(\"/\") ? SLASH_COMMAND_SELECT_LIST_LAYOUT : undefined;\n\t\treturn new SelectList(items, this.autocompleteMaxVisible, this.theme.selectList, layout);\n\t}\n\n\tprivate tryTriggerAutocomplete(explicitTab: boolean = false): void {\n\t\tthis.requestAutocomplete({ force: false, explicitTab });\n\t}\n\n\tprivate handleTabCompletion(): void {\n\t\tif (!this.autocompleteProvider) return;\n\n\t\tconst currentLine = this.state.lines[this.state.cursorLine] || \"\";\n\t\tconst beforeCursor = currentLine.slice(0, this.state.cursorCol);\n\n\t\tif (this.isInSlashCommandContext(beforeCursor) && !beforeCursor.trimStart().includes(\" \")) {\n\t\t\tthis.handleSlashCommandCompletion();\n\t\t} else {\n\t\t\tthis.forceFileAutocomplete(true);\n\t\t}\n\t}\n\n\tprivate handleSlashCommandCompletion(): void {\n\t\tthis.requestAutocomplete({ force: false, explicitTab: true });\n\t}\n\n\tprivate forceFileAutocomplete(explicitTab: boolean = false): void {\n\t\tthis.requestAutocomplete({ force: true, explicitTab });\n\t}\n\n\tprivate requestAutocomplete(options: { force: boolean; explicitTab: boolean }): void {\n\t\tif (!this.autocompleteProvider) return;\n\n\t\tif (options.force) {\n\t\t\tconst shouldTrigger =\n\t\t\t\t!this.autocompleteProvider.shouldTriggerFileCompletion ||\n\t\t\t\tthis.autocompleteProvider.shouldTriggerFileCompletion(\n\t\t\t\t\tthis.state.lines,\n\t\t\t\t\tthis.state.cursorLine,\n\t\t\t\t\tthis.state.cursorCol,\n\t\t\t\t);\n\t\t\tif (!shouldTrigger) {\n\t\t\t\treturn;\n\t\t\t}\n\t\t}\n\n\t\tthis.cancelAutocompleteRequest();\n\t\tconst startToken = ++this.autocompleteStartToken;\n\n\t\tconst debounceMs = this.getAutocompleteDebounceMs(options);\n\t\tif (debounceMs > 0) {\n\t\t\tthis.autocompleteDebounceTimer = setTimeout(() => {\n\t\t\t\tthis.autocompleteDebounceTimer = undefined;\n\t\t\t\tvoid this.startAutocompleteRequest(startToken, options);\n\t\t\t}, debounceMs);\n\t\t\treturn;\n\t\t}\n\n\t\tvoid this.startAutocompleteRequest(startToken, options);\n\t}\n\n\tprivate async startAutocompleteRequest(\n\t\tstartToken: number,\n\t\toptions: { force: boolean; explicitTab: boolean },\n\t): Promise<void> {\n\t\tconst previousTask = this.autocompleteRequestTask;\n\t\tthis.autocompleteRequestTask = (async () => {\n\t\t\tawait previousTask;\n\t\t\tif (startToken !== this.autocompleteStartToken || !this.autocompleteProvider) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst controller = new AbortController();\n\t\t\tthis.autocompleteAbort = controller;\n\t\t\tconst requestId = ++this.autocompleteRequestId;\n\t\t\tconst snapshotText = this.getText();\n\t\t\tconst snapshotLine = this.state.cursorLine;\n\t\t\tconst snapshotCol = this.state.cursorCol;\n\n\t\t\tawait this.runAutocompleteRequest(requestId, controller, snapshotText, snapshotLine, snapshotCol, options);\n\t\t})();\n\t\tawait this.autocompleteRequestTask;\n\t}\n\n\tprivate setAutocompleteTriggerCharacters(triggerCharacters: string[]): void {\n\t\tconst next = [...DEFAULT_AUTOCOMPLETE_TRIGGER_CHARACTERS];\n\t\tfor (const character of triggerCharacters) {\n\t\t\tif (character.length !== 1 || character === \"/\" || isWhitespaceChar(character) || next.includes(character)) {\n\t\t\t\tcontinue;\n\t\t\t}\n\t\t\tnext.push(character);\n\t\t}\n\t\tthis.autocompleteTriggerCharacters = next;\n\t\tthis.autocompleteTriggerPattern = buildTriggerPattern(next);\n\t\tthis.autocompleteDebouncePattern = buildDebouncePattern(next);\n\t}\n\n\tprivate getAutocompleteDebounceMs(options: { force: boolean; explicitTab: boolean }): number {\n\t\tif (options.explicitTab || options.force) {\n\t\t\treturn 0;\n\t\t}\n\n\t\tconst currentLine = this.state.lines[this.state.cursorLine] || \"\";\n\t\tconst textBeforeCursor = currentLine.slice(0, this.state.cursorCol);\n\t\treturn this.autocompleteDebouncePattern.test(textBeforeCursor) ? ATTACHMENT_AUTOCOMPLETE_DEBOUNCE_MS : 0;\n\t}\n\n\tprivate async runAutocompleteRequest(\n\t\trequestId: number,\n\t\tcontroller: AbortController,\n\t\tsnapshotText: string,\n\t\tsnapshotLine: number,\n\t\tsnapshotCol: number,\n\t\toptions: { force: boolean; explicitTab: boolean },\n\t): Promise<void> {\n\t\tif (!this.autocompleteProvider) return;\n\n\t\tconst suggestions = await this.autocompleteProvider.getSuggestions(\n\t\t\tthis.state.lines,\n\t\t\tthis.state.cursorLine,\n\t\t\tthis.state.cursorCol,\n\t\t\t{ signal: controller.signal, force: options.force },\n\t\t);\n\n\t\tif (!this.isAutocompleteRequestCurrent(requestId, controller, snapshotText, snapshotLine, snapshotCol)) {\n\t\t\treturn;\n\t\t}\n\n\t\tthis.autocompleteAbort = undefined;\n\n\t\tif (!suggestions || !Array.isArray(suggestions.items) || suggestions.items.length === 0) {\n\t\t\tthis.cancelAutocomplete();\n\t\t\tthis.tui.requestRender();\n\t\t\treturn;\n\t\t}\n\n\t\tif (options.force && options.explicitTab && suggestions.items.length === 1) {\n\t\t\tconst item = suggestions.items[0]!;\n\t\t\tthis.pushUndoSnapshot();\n\t\t\tthis.lastAction = null;\n\t\t\tconst result = this.autocompleteProvider.applyCompletion(\n\t\t\t\tthis.state.lines,\n\t\t\t\tthis.state.cursorLine,\n\t\t\t\tthis.state.cursorCol,\n\t\t\t\titem,\n\t\t\t\tsuggestions.prefix,\n\t\t\t);\n\t\t\tthis.state.lines = result.lines;\n\t\t\tthis.state.cursorLine = result.cursorLine;\n\t\t\tthis.setCursorCol(result.cursorCol);\n\t\t\tif (this.onChange) this.onChange(this.getText());\n\t\t\tthis.tui.requestRender();\n\t\t\treturn;\n\t\t}\n\n\t\tthis.applyAutocompleteSuggestions(suggestions, options.force ? \"force\" : \"regular\");\n\t\tthis.tui.requestRender();\n\t}\n\n\tprivate isAutocompleteRequestCurrent(\n\t\trequestId: number,\n\t\tcontroller: AbortController,\n\t\tsnapshotText: string,\n\t\tsnapshotLine: number,\n\t\tsnapshotCol: number,\n\t): boolean {\n\t\treturn (\n\t\t\t!controller.signal.aborted &&\n\t\t\trequestId === this.autocompleteRequestId &&\n\t\t\tthis.getText() === snapshotText &&\n\t\t\tthis.state.cursorLine === snapshotLine &&\n\t\t\tthis.state.cursorCol === snapshotCol\n\t\t);\n\t}\n\n\tprivate applyAutocompleteSuggestions(suggestions: AutocompleteSuggestions, state: \"regular\" | \"force\"): void {\n\t\tthis.autocompletePrefix = suggestions.prefix;\n\t\tthis.autocompleteList = this.createAutocompleteList(suggestions.prefix, suggestions.items);\n\n\t\tconst bestMatchIndex = this.getBestAutocompleteMatchIndex(suggestions.items, suggestions.prefix);\n\t\tif (bestMatchIndex >= 0) {\n\t\t\tthis.autocompleteList.setSelectedIndex(bestMatchIndex);\n\t\t}\n\n\t\tthis.autocompleteState = state;\n\t}\n\n\tprivate cancelAutocompleteRequest(): void {\n\t\tthis.autocompleteStartToken += 1;\n\t\tif (this.autocompleteDebounceTimer) {\n\t\t\tclearTimeout(this.autocompleteDebounceTimer);\n\t\t\tthis.autocompleteDebounceTimer = undefined;\n\t\t}\n\t\tthis.autocompleteAbort?.abort();\n\t\tthis.autocompleteAbort = undefined;\n\t}\n\n\tprivate clearAutocompleteUi(): void {\n\t\tthis.autocompleteState = null;\n\t\tthis.autocompleteList = undefined;\n\t\tthis.autocompletePrefix = \"\";\n\t}\n\n\tprivate cancelAutocomplete(): void {\n\t\tthis.cancelAutocompleteRequest();\n\t\tthis.clearAutocompleteUi();\n\t}\n\n\tpublic isShowingAutocomplete(): boolean {\n\t\treturn this.autocompleteState !== null;\n\t}\n\n\tprivate updateAutocomplete(): void {\n\t\tif (!this.autocompleteState || !this.autocompleteProvider) return;\n\t\tthis.requestAutocomplete({ force: this.autocompleteState === \"force\", explicitTab: false });\n\t}\n}\n"]}