feat(review): add InlineCommentComposer presentational component

frontend/src/components/feedback/InlineCommentComposer.tsx

@@ -0,0 +1,181 @@
+import React, { useRef, useEffect } from 'react';
+import {
+  PANEL_BG, BORDER, TEXT_PRIMARY, TEXT_MUTED, ACCENT,
+  INPUT_BG, INPUT_BORDER, INPUT_BORDER_FOCUS,
+} from './feedbackStyles';
+
+interface InlineCommentComposerProps {
+  visible: boolean;
+  x: number;
+  y: number;
+  placement: 'right' | 'left';
+  objectLabel?: string;
+  value: string;
+  onChange: (value: string) => void;
+  onSubmit: () => void;
+  onCancel: () => void;
+  submitting?: boolean;
+  autoFocus?: boolean;
+}
+
+const COMPOSER_WIDTH = 260;
+const OFFSET_X = 16;
+
+export default function InlineCommentComposer({
+  visible,
+  x,
+  y,
+  placement,
+  objectLabel,
+  value,
+  onChange,
+  onSubmit,
+  onCancel,
+  submitting = false,
+  autoFocus = true,
+}: InlineCommentComposerProps) {
+  const textareaRef = useRef<HTMLTextAreaElement>(null);
+
+  useEffect(() => {
+    if (visible && autoFocus && textareaRef.current) {
+      requestAnimationFrame(() => textareaRef.current?.focus());
+    }
+  }, [visible, autoFocus]);
+
+  if (!visible) return null;
+
+  const hasText = value.trim().length > 0;
+
+  const left = placement === 'right' ? x + OFFSET_X : x - OFFSET_X - COMPOSER_WIDTH;
+  const top = y - 30;
+
+  const handleKeyDown = (e: React.KeyboardEvent) => {
+    if (e.key === 'Enter' && !e.shiftKey) {
+      e.preventDefault();
+      if (hasText && !submitting) onSubmit();
+    }
+    if (e.key === 'Escape') {
+      e.preventDefault();
+      e.stopPropagation();
+      onCancel();
+    }
+  };
+
+  return (
+    <div
+      style={{
+        position: 'absolute',
+        left: `${left}px`,
+        top: `${top}px`,
+        width: `${COMPOSER_WIDTH}px`,
+        background: PANEL_BG,
+        backdropFilter: 'blur(16px)',
+        WebkitBackdropFilter: 'blur(16px)',
+        border: `1px solid ${BORDER}`,
+        borderRadius: '10px',
+        padding: '12px',
+        zIndex: 200,
+        boxShadow: '0 4px 24px rgba(0,0,0,0.5)',
+        fontFamily: "'Inter', system-ui, -apple-system, sans-serif",
+        pointerEvents: 'auto',
+      }}
+      onMouseDown={(e) => e.stopPropagation()}
+      onPointerDown={(e) => e.stopPropagation()}
+    >
+      {objectLabel && (
+        <div style={{
+          color: TEXT_MUTED,
+          fontSize: '10px',
+          marginBottom: '8px',
+          textTransform: 'uppercase',
+          letterSpacing: '0.5px',
+          overflow: 'hidden',
+          textOverflow: 'ellipsis',
+          whiteSpace: 'nowrap',
+        }}>
+          {objectLabel}
+        </div>
+      )}
+
+      <textarea
+        ref={textareaRef}
+        value={value}
+        onChange={(e) => onChange(e.target.value)}
+        onKeyDown={handleKeyDown}
+        placeholder="Add a comment..."
+        disabled={submitting}
+        rows={2}
+        style={{
+          width: '100%',
+          background: INPUT_BG,
+          border: `1px solid ${INPUT_BORDER}`,
+          borderRadius: '6px',
+          color: TEXT_PRIMARY,
+          fontSize: '12px',
+          padding: '8px 10px',
+          resize: 'none',
+          outline: 'none',
+          fontFamily: 'inherit',
+          lineHeight: 1.5,
+          boxSizing: 'border-box',
+          transition: 'border-color 0.15s',
+        }}
+        onFocus={(e) => { e.currentTarget.style.borderColor = INPUT_BORDER_FOCUS; }}
+        onBlur={(e) => { e.currentTarget.style.borderColor = INPUT_BORDER; }}
+      />
+
+      <div style={{
+        display: 'flex',
+        justifyContent: 'flex-end',
+        gap: '6px',
+        marginTop: '8px',
+      }}>
+        <button
+          onClick={onCancel}
+          disabled={submitting}
+          style={{
+            background: 'transparent',
+            border: `1px solid ${BORDER}`,
+            borderRadius: '6px',
+            color: TEXT_MUTED,
+            fontSize: '11px',
+            padding: '4px 10px',
+            cursor: 'pointer',
+            fontFamily: 'inherit',
+          }}
+        >
+          Cancel
+        </button>
+        <button
+          onClick={() => { if (hasText && !submitting) onSubmit(); }}
+          disabled={!hasText || submitting}
+          style={{
+            background: hasText && !submitting ? ACCENT : '#2a2a2e',
+            border: 'none',
+            borderRadius: '6px',
+            color: hasText && !submitting ? '#fff' : TEXT_MUTED,
+            fontSize: '11px',
+            fontWeight: 600,
+            padding: '4px 12px',
+            cursor: hasText && !submitting ? 'pointer' : 'default',
+            fontFamily: 'inherit',
+            opacity: submitting ? 0.6 : 1,
+            transition: 'background 0.15s, opacity 0.15s',
+          }}
+        >
+          {submitting ? 'Posting...' : 'Comment'}
+        </button>
+      </div>
+
+      <div style={{
+        color: TEXT_MUTED,
+        fontSize: '9px',
+        marginTop: '6px',
+        textAlign: 'right',
+        opacity: 0.7,
+      }}>
+        Enter to submit · Shift+Enter for newline
+      </div>
+    </div>
+  );
+}