frontend/src/components/LinkPreview.vue

@@ -1,12 +1,24 @@
 <script setup lang="ts">
 import type { LinkPreview } from "../stores/notes";
 
-defineProps<{ preview: LinkPreview; removable?: boolean }>();
+/**
+ * A fetched link preview, in one of two sizes.
+ *
+ * `compact` is a single row — favicon-less, one line of title, the site name — for a
+ * URL mentioned *inside* a note that has its own text. The note is the thing; the
+ * link is a footnote to it.
+ *
+ * Full size is for a note that is NOTHING but a URL. There the link IS the note, and
+ * a compact strip would be a card with nothing on it.
+ */
+defineProps<{ preview: LinkPreview; removable?: boolean; compact?: boolean }>();
 defineEmits<{ (e: "remove"): void }>();
 </script>
 
 <template>
-  <div class="group/lp relative overflow-hidden rounded-lg border border-neutral-200 dark:border-neutral-700">
+  <div
+    class="group/lp relative overflow-hidden rounded-lg border border-neutral-200 dark:border-neutral-700"
+  >
     <a
       :href="preview.url"
       target="_blank"
@@ -19,16 +31,28 @@ defineEmits<{ (e: "remove"): void }>();
         alt=""
         loading="lazy"
         decoding="async"
-        class="h-auto w-24 shrink-0 self-stretch object-cover"
+        class="h-auto shrink-0 self-stretch object-cover"
+        :class="compact ? 'w-12' : 'w-24'"
       />
-      <div class="min-w-0 flex-1 px-3 py-2">
-        <p v-if="preview.site_name" class="truncate text-[11px] uppercase tracking-wide text-neutral-400">
+      <div class="min-w-0 flex-1" :class="compact ? 'px-2 py-1.5' : 'px-3 py-2'">
+        <p
+          v-if="preview.site_name"
+          class="truncate uppercase tracking-wide text-neutral-400"
+          :class="compact ? 'text-[10px]' : 'text-[11px]'"
+        >
           {{ preview.site_name }}
         </p>
-        <p class="truncate text-sm font-medium text-neutral-800 dark:text-neutral-100">
+        <p
+          class="truncate font-medium text-neutral-800 dark:text-neutral-100"
+          :class="compact ? 'text-xs' : 'text-sm'"
+        >
           {{ preview.title || preview.url }}
         </p>
-        <p v-if="preview.description" class="mt-0.5 line-clamp-2 text-xs text-neutral-500 dark:text-neutral-400">
+        <!-- The description is the first thing to go when there is no room for it. -->
+        <p
+          v-if="preview.description && !compact"
+          class="mt-0.5 line-clamp-2 text-xs text-neutral-500 dark:text-neutral-400"
+        >
           {{ preview.description }}
         </p>
       </div>

frontend/src/components/NoteCard.vue

@@ -68,6 +68,26 @@ const otherAttachments = computed(() => props.note.attachments.filter((a) => !a.
 // exactly, and skips parsing a body the card was never going to show.
 const PREVIEW_LINES = 8;
 
+// --- Links ------------------------------------------------------------------
+//
+// A note that is NOTHING but a URL is a link, and its preview is the whole card —
+// showing the raw URL underneath a card that already says where it goes is saying the
+// same thing twice, badly. A URL mentioned *inside* a note is a footnote to it, and
+// gets a compact strip at the bottom instead.
+//
+// Whitespace either side still counts as lone: someone pasting a link rarely trims it.
+const LONE_URL_RE = /^\s*(https?:\/\/[^\s<>"'\])]+)\s*$/;
+
+const isLoneUrl = computed(() => LONE_URL_RE.test(props.note.body) && !props.note.items.length);
+
+/** The preview for a lone-URL note — null while it is still being fetched, or if it
+ *  could never be fetched at all. */
+const loneUrlPreview = computed(() => {
+  if (!isLoneUrl.value) return null;
+  const url = props.note.body.trim();
+  return props.note.previews.find((p) => p.url === url) ?? null;
+});
+
 const bodyPreview = computed(() => {
   const lines = props.note.body.split("\n");
   if (lines.length <= PREVIEW_LINES) return props.note.body;
@@ -226,9 +246,6 @@ onBeforeUnmount(() => document.removeEventListener("mousedown", onDocMousedown))
       </span>
     </div>
 
-    <div v-if="note.previews.length" class="mb-2 flex flex-col gap-2">
-      <LinkPreview v-for="p in note.previews" :key="p.id" :preview="p" />
-    </div>
 
     <!-- One render path: every note is a body plus, maybe, checkable items.
          A focusable div rather than a <button>, because a checklist nests interactive
@@ -241,7 +258,11 @@ onBeforeUnmount(() => document.removeEventListener("mousedown", onDocMousedown))
       @click="emit('open', note)"
       @keydown.enter="emit('open', note)"
     >
-      <div v-if="note.body" class="text-sm text-neutral-700 dark:text-neutral-300">
+      <!-- A lone URL renders as its preview and nothing else. Until the fetch lands
+           — or if it never does — the URL itself stands in, so the card is never
+           blank and the link is never unreachable. -->
+      <LinkPreview v-if="loneUrlPreview" :preview="loneUrlPreview" />
+      <div v-else-if="note.body" class="text-sm text-neutral-700 dark:text-neutral-300">
         <MarkdownText :text="bodyPreview" />
       </div>
       <p
@@ -251,6 +272,13 @@ onBeforeUnmount(() => document.removeEventListener("mousedown", onDocMousedown))
         Empty note
       </p>
     </div>
+    <!-- Inline links: a compact strip at the FOOT of the card, under the note's own
+         words rather than stacked on top of them. They were above the body until
+         M13 — which put a stranger's headline where the note's first line should be. -->
+    <div v-if="!isLoneUrl && note.previews.length" class="mt-2 flex flex-col gap-1">
+      <LinkPreview v-for="p in note.previews" :key="p.id" :preview="p" compact />
+    </div>
+
     <NoteChecklist
       v-if="note.items.length"
       :class="note.body ? 'mt-2' : ''"

frontend/src/components/NoteEditor.vue

@@ -1,7 +1,6 @@
 <script setup lang="ts">
 import { computed, nextTick, onMounted, ref, watch } from "vue";
 import { useNotesStore } from "../stores/notes";
-import { useConfigStore } from "../stores/config";
 import ColorPicker from "./ColorPicker.vue";
 import Icon from "./Icon.vue";
 import LabelPicker from "./LabelPicker.vue";
@@ -24,7 +23,6 @@ const props = withDefaults(defineProps<{ note?: Note | null; initialBody?: strin
 });
 const emit = defineEmits<{ (e: "close"): void; (e: "navigate", id: string): void }>();
 const notes = useNotesStore();
-const config = useConfigStore();
 
 const noteId = ref<string | null>(props.note?.id ?? null);
 const body = ref(props.note?.body ?? props.initialBody);
@@ -323,41 +321,12 @@ async function uploadFile(file: File) {
   }
 }
 
-// ---- link previews (URL unfurl) ----
-const unfurling = ref<string | null>(null); // the URL currently being fetched
-const unfurlError = ref("");
-// Bare http(s) URLs in the body; trailing sentence punctuation trimmed.
-const URL_RE = /(https?:\/\/[^\s<>"'\])]+)/g;
-const detectedUrls = computed(() => {
-  const out: string[] = [];
-  for (const m of body.value.matchAll(URL_RE)) {
-    const u = m[1].replace(/[.,;:!?]+$/, "");
-    if (!out.includes(u)) out.push(u);
-  }
-  return out;
-});
-const previewedUrls = computed(() => new Set(liveNote.value.previews.map((p) => p.url)));
-const unpreviewedUrls = computed(() => detectedUrls.value.filter((u) => !previewedUrls.value.has(u)));
-async function addPreview(url: string) {
-  const id = await ensureDraft();
-  if (!id) return;
-  unfurling.value = url;
-  unfurlError.value = "";
-  try {
-    await notes.unfurl(id, url);
-  } catch (e) {
-    unfurlError.value = (e as { error?: string }).error ?? "Couldn't fetch a preview for that link.";
-  } finally {
-    unfurling.value = null;
-  }
-}
-function shortUrl(url: string): string {
-  try {
-    return new URL(url).hostname.replace(/^www\./, "");
-  } catch {
-    return url;
-  }
-}
+// ---- link previews ----
+//
+// Nothing to trigger any more: the server unfurls a note's URLs in the background
+// after each save (`unfurl_queue.py`) and the preview arrives on a later read. What
+// is left here is removing one you don't want — the editor is the only place with
+// room to offer that, and the card deliberately doesn't.
 async function onFileChange(e: Event) {
   const input = e.target as HTMLInputElement;
   const file = input.files?.[0];
@@ -494,7 +463,7 @@ function revPreview(rev: NoteRevision): string {
         </div>
         <p v-if="uploadError" class="text-xs text-red-600 dark:text-red-400">{{ uploadError }}</p>
 
-        <!-- Link previews: stored preview cards + one "Preview <domain>" per detected URL -->
+        <!-- Fetched automatically after each save; removable here and nowhere else. -->
         <div v-if="liveNote.previews.length" class="flex flex-col gap-2">
           <LinkPreview
             v-for="p in liveNote.previews"
@@ -504,23 +473,6 @@ function revPreview(rev: NoteRevision): string {
             @remove="notes.deletePreview(liveNote.id, p.id)"
           />
         </div>
-        <div
-          v-if="config.enableUrlUnfurl && !liveNote.trashed && unpreviewedUrls.length"
-          class="flex flex-wrap gap-1.5"
-        >
-          <button
-            v-for="u in unpreviewedUrls"
-            :key="u"
-            type="button"
-            class="inline-flex items-center gap-1 rounded-full border border-neutral-200 px-2 py-0.5 text-xs text-neutral-500 hover:bg-neutral-50 focus:outline-none focus-visible:ring-2 focus-visible:ring-brand disabled:opacity-60 dark:border-neutral-700 dark:hover:bg-neutral-800"
-            :disabled="unfurling === u"
-            @click="addPreview(u)"
-          >
-            <Icon name="link" />
-            {{ unfurling === u ? "Fetching…" : `Preview ${shortUrl(u)}` }}
-          </button>
-        </div>
-        <p v-if="unfurlError" class="text-xs text-red-600 dark:text-red-400">{{ unfurlError }}</p>
 
         <textarea
           ref="bodyInput"

src/thoughtsync/notes/__init__.py

@@ -37,6 +37,7 @@ from ..models.note_revision import NoteRevision
 from ..responses import json_error, not_found, parse_uuid
 from ..retention import purge_note
 from ..settings import get_setting
+from ..unfurl_queue import schedule as schedule_unfurls
 from ..unfurl import UnfurlError, unfurl
 from ._bp import bp
 from .helpers import (
@@ -454,6 +455,9 @@ async def create_note():
         await _reconcile_tags(db, note)
         await db.commit()
         await db.refresh(note)
+        # After the commit, never before it: the note is saved and the response is
+        # about to go out. Any link previews arrive on a later read.
+        schedule_unfurls(note.id, note.body)
         return jsonify(await _serialize_note(db, note)), 201
 
 
@@ -509,6 +513,8 @@ async def update_note(note_id: str):
             db.add(NoteRevision(note_id=note.id, body=old_body))
         await db.commit()
         await db.refresh(note)
+        if note.body != old_body:
+            schedule_unfurls(note.id, note.body)
         return jsonify(await _serialize_note(db, note))
 
 

src/thoughtsync/sync.py

@@ -35,6 +35,7 @@ from .notes import (
 )
 from .retention import purge_note
 from .serialize import serialize_label_sync
+from .unfurl_queue import schedule as schedule_unfurls
 
 bp = Blueprint("sync", __name__, url_prefix="/api/sync")
 
@@ -325,6 +326,11 @@ async def _apply_note(db, ch: dict) -> dict:
     await _apply_note_manual_labels(db, note, ch)
     await db.flush()
     await db.refresh(note, ["sync_revision"])
+    # A note pushed from a linked client gets the same link previews as one typed into
+    # the web app — the client picks them up on its next pull. Scheduled rather than
+    # awaited: a push batch must not wait on somebody else's website.
+    if creating or note.body != old_body:
+        schedule_unfurls(note.id, note.body)
     return {
         "id": str(nid),
         "entity": "note",

src/thoughtsync/unfurl_queue.py

@@ -0,0 +1,127 @@
+"""Unfurling a note's URLs in the background, after the note is already saved.
+
+## Why this is not done inline
+
+Capture speed is the product. Unfurling is a 5-second-timeout network call to a host
+nobody controls, and a note must persist the instant someone stops typing — so the
+save returns first and the preview catches up. A person who pastes a link and closes
+the composer has already done the thing they came to do.
+
+## Why it is on the server rather than in each client
+
+The server sees every note that reaches it, from all three surfaces, so detection and
+fetching live in one place instead of three. A linked desktop or Android client pushes
+its note and picks the preview up on the next pull; an unlinked one has no server to
+ask and simply has no preview until it links, which is the honest consequence of being
+offline rather than a gap to paper over.
+
+## What it deliberately does not do
+
+Fail loudly. A preview that could not be fetched is not an error the person needs —
+the note is fine, it just has no card. The link is still in the body, still clickable,
+still searchable.
+"""
+from __future__ import annotations
+
+import asyncio
+import logging
+import re
+import uuid
+
+from sqlalchemy import select
+
+from .db import session_scope
+from .models.note import Note
+from .models.note_link_preview import NoteLinkPreview
+from .settings import get_setting
+from .unfurl import UnfurlError, unfurl
+
+logger = logging.getLogger(__name__)
+
+# Matches the frontend's detector (NoteEditor.vue) so both surfaces agree on what
+# counts as a link. Trailing sentence punctuation is stripped below rather than in the
+# pattern — a URL can legitimately end in most of these characters, just not when the
+# sentence does.
+_URL_RE = re.compile(r"(https?://[^\s<>\"'\])]+)")
+
+# Per note, per save. A body pasted full of links should not turn into a burst of
+# outbound requests; nobody is reading forty preview cards on one card anyway.
+MAX_URLS_PER_NOTE = 5
+
+# Background tasks are only weakly referenced by the event loop, so without a strong
+# reference here a task can be garbage-collected mid-flight. Discarded on completion.
+_running: set[asyncio.Task] = set()
+
+
+def detect_urls(body: str | None) -> list[str]:
+    """Distinct http(s) URLs in a note body, in order, trailing punctuation trimmed."""
+    out: list[str] = []
+    for match in _URL_RE.finditer(body or ""):
+        url = match.group(1).rstrip(".,;:!?")
+        if url and url not in out:
+            out.append(url)
+    return out
+
+
+async def _fetch_and_store(note_id: uuid.UUID, url: str) -> None:
+    """Unfurl one URL and cache it against the note. Silent on every failure."""
+    try:
+        preview = await unfurl(url)
+    except UnfurlError as e:
+        # Expected and uninteresting: a dead link, a private address, a non-page.
+        logger.debug("no preview for %s: %s", url, e)
+        return
+    except Exception:
+        logger.warning("unexpected failure unfurling %s", url, exc_info=True)
+        return
+
+    async with session_scope() as db:
+        # The note may have been deleted or the URL removed while the fetch was in
+        # flight, so re-check rather than assuming the world held still.
+        note = await db.scalar(select(Note).where(Note.id == note_id, Note.deleted_at.is_(None)))
+        if note is None or url not in detect_urls(note.body):
+            return
+        row = await db.scalar(
+            select(NoteLinkPreview).where(NoteLinkPreview.note_id == note_id, NoteLinkPreview.url == url)
+        )
+        if row is None:
+            row = NoteLinkPreview(note_id=note_id, url=url)
+            db.add(row)
+        row.title = preview["title"]
+        row.description = preview["description"]
+        row.image_url = preview["image_url"]
+        row.site_name = preview["site_name"]
+        await db.commit()
+
+
+async def _unfurl_new_urls(note_id: uuid.UUID, body: str) -> None:
+    async with session_scope() as db:
+        if not await get_setting(db, "enable_url_unfurl"):
+            return
+        cached = set(
+            (
+                await db.scalars(select(NoteLinkPreview.url).where(NoteLinkPreview.note_id == note_id))
+            ).all()
+        )
+    fresh = [u for u in detect_urls(body) if u not in cached][:MAX_URLS_PER_NOTE]
+    for url in fresh:
+        await _fetch_and_store(note_id, url)
+
+
+def schedule(note_id: uuid.UUID, body: str | None) -> None:
+    """Queue an unfurl pass for a note that was just written. Returns immediately.
+
+    Safe to call on every save: it re-reads what is already cached and does nothing
+    when there is nothing new, so an edit that doesn't touch the links costs one
+    cheap query on a background task rather than a fetch.
+    """
+    if not body or not detect_urls(body):
+        return
+    try:
+        task = asyncio.create_task(_unfurl_new_urls(note_id, body))
+    except RuntimeError:
+        # No running loop — a script or a test calling the write path directly. The
+        # note is saved either way; only the preview is skipped.
+        return
+    _running.add(task)
+    task.add_done_callback(_running.discard)

tests/test_integration.py

@@ -26,13 +26,15 @@ from thoughtsync.models.note import Note
 from thoughtsync.models.note_item import NoteItem
 from thoughtsync.models.user import User
 from thoughtsync.notes.helpers import derive_display_title
+from thoughtsync.models.note_link_preview import NoteLinkPreview
 from thoughtsync.sync import _apply_note_items
+from thoughtsync.unfurl_queue import _unfurl_new_urls, detect_urls
 
 pytestmark = pytest.mark.integration
 
 # Every table the tests touch, child-first so FKs never block the truncate.
 # RESTART IDENTITY + CASCADE keeps this honest if a table gains children later.
-_TABLES = "notes, note_items, note_revisions, note_labels, labels, users"
+_TABLES = "notes, note_items, note_revisions, note_labels, note_link_previews, labels, users"
 
 
 @pytest_asyncio.fixture
@@ -201,3 +203,81 @@ async def test_a_note_with_only_items_still_has_a_name(db, owner):
     await db.commit()
 
     assert (await db.scalar(select(Note.display_title).where(Note.id == note.id))) == "milk"
+
+
+async def test_auto_unfurl_stores_a_preview_and_skips_what_is_cached(db, owner, monkeypatch):
+    """The background pass, run inline so the assertions are deterministic.
+
+    The network is stubbed — this is about what reaches the DATABASE, not about
+    parsing someone's OpenGraph tags (unfurl.py's own tests cover that). What matters
+    here is the part only a real database can show: the unique constraint holding, the
+    upsert going to the right row, and a second pass not re-fetching.
+    """
+    note = Note(
+        owner_id=owner.id,
+        body="read https://example.com/a and https://example.com/b",
+        display_title="read https://example.com/a and https://example.com/b",
+    )
+    db.add(note)
+    await db.commit()
+
+    calls: list[str] = []
+
+    async def fake_unfurl(url):
+        calls.append(url)
+        return {"url": url, "title": f"T {url}", "description": None, "image_url": None, "site_name": "example.com"}
+
+    monkeypatch.setattr("thoughtsync.unfurl_queue.unfurl", fake_unfurl)
+
+    await _unfurl_new_urls(note.id, note.body)
+    assert sorted(calls) == ["https://example.com/a", "https://example.com/b"]
+
+    rows = (await db.scalars(select(NoteLinkPreview).where(NoteLinkPreview.note_id == note.id))).all()
+    assert {r.url for r in rows} == {"https://example.com/a", "https://example.com/b"}
+    assert all(r.title.startswith("T ") for r in rows)
+
+    # A second pass over an unchanged body fetches nothing — the whole reason
+    # `schedule` is safe to call on every save.
+    calls.clear()
+    await _unfurl_new_urls(note.id, note.body)
+    assert calls == []
+
+
+async def test_auto_unfurl_drops_a_preview_whose_url_left_the_body(db, owner, monkeypatch):
+    """A slow fetch must not resurrect a link the person deleted mid-flight."""
+    note = Note(owner_id=owner.id, body="https://example.com/gone", display_title="x")
+    db.add(note)
+    await db.commit()
+
+    async def fake_unfurl(url):
+        # Simulate the body changing while the request was in the air.
+        return {"url": url, "title": "T", "description": None, "image_url": None, "site_name": None}
+
+    monkeypatch.setattr("thoughtsync.unfurl_queue.unfurl", fake_unfurl)
+    note.body = "changed my mind"
+    await db.commit()
+
+    await _unfurl_new_urls(note.id, "https://example.com/gone")
+    rows = (await db.scalars(select(NoteLinkPreview).where(NoteLinkPreview.note_id == note.id))).all()
+    assert rows == [], "a preview was stored for a URL the note no longer contains"
+
+
+async def test_detection_agrees_with_what_gets_stored(db, owner, monkeypatch):
+    """The detector and the storage path read the same body the same way."""
+    body = "one https://example.com/x. two (https://example.com/y) three"
+    assert detect_urls(body) == ["https://example.com/x", "https://example.com/y"]
+
+    note = Note(owner_id=owner.id, body=body, display_title="one")
+    db.add(note)
+    await db.commit()
+
+    async def fake_unfurl(url):
+        return {"url": url, "title": "T", "description": None, "image_url": None, "site_name": None}
+
+    monkeypatch.setattr("thoughtsync.unfurl_queue.unfurl", fake_unfurl)
+    await _unfurl_new_urls(note.id, body)
+
+    stored = {
+        r for r in (await db.scalars(select(NoteLinkPreview.url).where(NoteLinkPreview.note_id == note.id))).all()
+    }
+    assert stored == set(detect_urls(body))

tests/test_notes.py

@@ -5,6 +5,7 @@ import pytest
 from thoughtsync.app import create_app
 from thoughtsync.common import coerce_bool, parse_dt
 from thoughtsync.models.note import NOTE_COLORS, Note
+from thoughtsync.unfurl_queue import detect_urls
 from thoughtsync.notes import (
     _attachment_ext,
     _header_filename,
@@ -386,3 +387,22 @@ def test_native_spec_roundtrip_fields():
     assert spec["created_at"].year == 2026
     assert spec["labels"] == ["x"]
     assert spec["attachments"] == [{"file": "attachments/ab/img.png", "mime": "image/png"}]
+
+
+def test_detect_urls_finds_each_link_once_in_order():
+    body = "see https://example.com/a and https://example.com/b\nand https://example.com/a again"
+    assert detect_urls(body) == ["https://example.com/a", "https://example.com/b"]
+
+
+def test_detect_urls_trims_sentence_punctuation():
+    # A URL can end in most punctuation; a SENTENCE containing one usually doesn't.
+    assert detect_urls("read https://example.com/page.") == ["https://example.com/page"]
+    assert detect_urls("(see https://example.com/x)") == ["https://example.com/x"]
+    # …but a path that legitimately ends in a slash or a dash keeps it.
+    assert detect_urls("https://example.com/dir/") == ["https://example.com/dir/"]
+
+
+def test_detect_urls_ignores_non_http():
+    assert detect_urls("ftp://example.com and mailto:a@b.c and bare example.com") == []
+    assert detect_urls(None) == []
+    assert detect_urls("") == []