feat(db): mesh data model — meshes, members, invites, audit log

- pgSchema "mesh" with 4 tables isolating the peer mesh domain
- Enums: visibility, transport, tier, role
- audit_log is metadata-only (E2E encryption enforced at broker/client)
- Cascade on mesh delete, soft-delete via archivedAt/revokedAt

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/web/src/modules/pdf/components/text-selection-action.tsx

@@ -0,0 +1,126 @@
+"use client";
+
+import { useCallback, useEffect, useRef, useState } from "react";
+
+import { useTranslation } from "@turbostarter/i18n";
+import { cn } from "@turbostarter/ui";
+import { Button } from "@turbostarter/ui-web/button";
+import { Icons } from "@turbostarter/ui-web/icons";
+
+// ============================================================================
+// Types
+// ============================================================================
+
+interface TextSelectionActionProps {
+  onAskAbout: (text: string) => void;
+  disabled?: boolean;
+}
+
+interface SelectionState {
+  text: string;
+  x: number;
+  y: number;
+}
+
+// ============================================================================
+// Text Selection Action
+// ============================================================================
+
+/**
+ * Floating action button that appears when text is selected in the PDF viewer.
+ * Clicking "Ask about this" sends the selected text to the chat composer.
+ *
+ * Uses mouseup event instead of selectionchange to avoid excessive re-renders.
+ */
+export function TextSelectionAction({
+  onAskAbout,
+  disabled,
+}: TextSelectionActionProps) {
+  const { t } = useTranslation("ai");
+  const [selection, setSelection] = useState<SelectionState | null>(null);
+  const buttonRef = useRef<HTMLDivElement>(null);
+
+  // Handle mouse up to check for selection
+  const handleMouseUp = useCallback(() => {
+    // Small delay to ensure selection is complete
+    requestAnimationFrame(() => {
+      const sel = window.getSelection();
+      const text = sel?.toString().trim();
+
+      if (text && text.length > 3) {
+        // Only show for meaningful selections (more than 3 chars)
+        const range = sel?.getRangeAt(0);
+        const rect = range?.getBoundingClientRect();
+
+        if (rect && rect.width > 0) {
+          setSelection({
+            text,
+            x: rect.left + rect.width / 2,
+            y: rect.top - 10,
+          });
+        }
+      }
+    });
+  }, []);
+
+  // Clear selection when clicking outside
+  const handleMouseDown = useCallback((e: MouseEvent) => {
+    const target = e.target as HTMLElement;
+    // Don't clear if clicking on the action button itself
+    if (buttonRef.current?.contains(target)) return;
+
+    setSelection(null);
+  }, []);
+
+  // Listen for mouse events
+  useEffect(() => {
+    document.addEventListener("mouseup", handleMouseUp);
+    document.addEventListener("mousedown", handleMouseDown);
+
+    return () => {
+      document.removeEventListener("mouseup", handleMouseUp);
+      document.removeEventListener("mousedown", handleMouseDown);
+    };
+  }, [handleMouseUp, handleMouseDown]);
+
+  const handleAskAbout = useCallback(() => {
+    if (selection?.text) {
+      onAskAbout(selection.text);
+      // Clear selection after asking
+      window.getSelection()?.removeAllRanges();
+      setSelection(null);
+    }
+  }, [selection, onAskAbout]);
+
+  if (!selection) {
+    return null;
+  }
+
+  return (
+    <div
+      ref={buttonRef}
+      data-selection-action
+      className={cn(
+        "fixed z-50 -translate-x-1/2 -translate-y-full",
+        "animate-in fade-in-0 zoom-in-95 duration-150"
+      )}
+      style={{
+        left: selection.x,
+        top: selection.y,
+      }}
+    >
+      <Button
+        size="sm"
+        variant="default"
+        className="gap-2 shadow-lg"
+        onClick={handleAskAbout}
+        disabled={disabled}
+      >
+        <Icons.MessagesSquare className="size-3.5" />
+        {t("pdf.selection.askAbout")}
+      </Button>
+    </div>
+  );
+}
+
+export default TextSelectionAction;