Point the import-guide links at the docs site that actually has them

Both import cards linked /docs/integrations/data-import — a path the
app never serves, so every click 404'd. Link the external docs site
through the shared INTEGRATION_DOCS_BASE constant, opening in a new tab
like every other integrations runbook link.

src/components/settings/import-panel/__tests__/import-docs-link.test.ts

@@ -0,0 +1,30 @@
+/**
+ * The import cards' "docs" links must point at the external docs site.
+ *
+ * The app serves no `/docs` tree, so the old internal
+ * `/docs/integrations/data-import` href 404'd for every user who
+ * clicked it. The guide lives at `docs.healthlog.dev`; the link goes
+ * through `INTEGRATION_DOCS_BASE` so the host lives in exactly one
+ * place (the same constant every Settings → Integrations card uses).
+ *
+ * Watched red: restoring `href="/docs/integrations/data-import"` in
+ * either card fails the matching assertion below.
+ */
+import { readFileSync } from "node:fs";
+import { join } from "node:path";
+import { describe, expect, it } from "vitest";
+
+const CARDS = ["csv-import-card.tsx", "json-import-card.tsx"] as const;
+
+describe("import-card docs links", () => {
+  for (const card of CARDS) {
+    it(`${card} links the external docs site, never an internal /docs path`, () => {
+      const source = readFileSync(join(__dirname, "..", card), "utf8");
+      expect(source).not.toContain('href="/docs');
+      expect(source).toContain("INTEGRATION_DOCS_BASE");
+      expect(source).toContain("data-import");
+      // External link hygiene for a new-tab docs jump.
+      expect(source).toContain('rel="noopener noreferrer"');
+    });
+  }
+});

src/components/settings/import-panel/csv-import-card.tsx

@@ -1,7 +1,6 @@
 "use client";
 
 import { useId, useRef, useState } from "react";
-import Link from "next/link";
 import {
   AlertCircle,
   Download,
@@ -15,6 +14,7 @@ import { SettingsCardActions } from "@/components/settings/_card-actions";
 import { Label } from "@/components/ui/label";
 import { Textarea } from "@/components/ui/textarea";
 import { useTranslations } from "@/lib/i18n/context";
+import { INTEGRATION_DOCS_BASE } from "@/components/settings/integrations/setup-guide-link";
 import { apiFetchRaw } from "@/lib/api/api-fetch";
 import { ImportCardShell } from "./import-card-shell";
 import { MAX_PASTE_CHARS } from "./constants";
@@ -151,12 +151,16 @@ export function CsvImportCard() {
 
       <p className="text-muted-foreground text-xs">
         {t("settings.sections.export.import.csv.schemaHint")}{" "}
-        <Link
-          href="/docs/integrations/data-import"
+        {/* The import guide lives on the external docs site — the app
+            itself serves no /docs tree, so an internal link 404s. */}
+        <a
+          href={`${INTEGRATION_DOCS_BASE}/data-import`}
+          target="_blank"
+          rel="noopener noreferrer"
           className="text-primary underline underline-offset-2"
         >
           {t("settings.sections.export.import.csv.docsLink")}
-        </Link>
+        </a>
       </p>
 
       <div aria-live="polite" className="space-y-2">

src/components/settings/import-panel/json-import-card.tsx

@@ -1,7 +1,6 @@
 "use client";
 
 import { useId, useRef, useState } from "react";
-import Link from "next/link";
 import { AlertCircle, Download, FileJson, Loader2, Upload } from "lucide-react";
 
 import { Button } from "@/components/ui/button";
@@ -9,6 +8,7 @@ import { SettingsCardActions } from "@/components/settings/_card-actions";
 import { Label } from "@/components/ui/label";
 import { Textarea } from "@/components/ui/textarea";
 import { useTranslations } from "@/lib/i18n/context";
+import { INTEGRATION_DOCS_BASE } from "@/components/settings/integrations/setup-guide-link";
 import { apiFetchRaw } from "@/lib/api/api-fetch";
 import { ImportCardShell } from "./import-card-shell";
 import { MAX_PASTE_CHARS } from "./constants";
@@ -167,12 +167,16 @@ export function JsonImportCard() {
 
       <p className="text-muted-foreground text-xs">
         {t("settings.sections.export.import.json.schemaHint")}{" "}
-        <Link
-          href="/docs/integrations/data-import"
+        {/* The import guide lives on the external docs site — the app
+            itself serves no /docs tree, so an internal link 404s. */}
+        <a
+          href={`${INTEGRATION_DOCS_BASE}/data-import`}
+          target="_blank"
+          rel="noopener noreferrer"
           className="text-primary underline underline-offset-2"
         >
           {t("settings.sections.export.import.json.docsLink")}
-        </Link>
+        </a>
       </p>
 
       <div aria-live="polite" className="space-y-2">