diff --git a/app/api/routers/admin_dbops.py b/app/api/routers/admin_dbops.py
index ce63ea2..048be70 100644
--- a/app/api/routers/admin_dbops.py
+++ b/app/api/routers/admin_dbops.py
@@ -57,7 +57,7 @@ def _requested_by_value(*, payload, admin_user: User) -> str:
     return from_payload or admin_user.email
 
 
-def _serialize_pdf_queue_item(item) -> dict[str, object]:
+def _serialize_pdf_queue_item(item, *, is_admin: bool = False) -> dict[str, object]:
     return {
         "publication_id": item.publication_id,
         "title": item.title,
@@ -69,7 +69,7 @@ def _serialize_pdf_queue_item(item) -> dict[str, object]:
         "last_failure_detail": item.last_failure_detail,
         "last_source": item.last_source,
         "requested_by_user_id": item.requested_by_user_id,
-        "requested_by_email": item.requested_by_email,
+        "requested_by_email": item.requested_by_email if is_admin else None,
         "queued_at": item.queued_at,
         "last_attempt_at": item.last_attempt_at,
         "resolved_at": item.resolved_at,
@@ -215,7 +215,7 @@ async def get_pdf_queue(
     return success_payload(
         request,
         data={
-            "items": [_serialize_pdf_queue_item(item) for item in queue_page.items],
+            "items": [_serialize_pdf_queue_item(item, is_admin=current_user.is_admin) for item in queue_page.items],
             **_pdf_queue_page_data(
                 total_count=queue_page.total_count,
                 page=resolved_page,
diff --git a/app/api/routers/scholars.py b/app/api/routers/scholars.py
index 92782b1..2a0c276 100644
--- a/app/api/routers/scholars.py
+++ b/app/api/routers/scholars.py
@@ -51,7 +51,14 @@ def _parse_ids_param(ids: str | None) -> list[int] | None:
     parts = [p.strip() for p in ids.split(",") if p.strip()]
     if not parts:
         return None
-    return [int(p) for p in parts]
+    try:
+        return [int(p) for p in parts]
+    except ValueError as exc:
+        raise ApiException(
+            status_code=400,
+            code="invalid_ids_param",
+            message="The 'ids' parameter must be a comma-separated list of integers.",
+        ) from exc
 
 
 @router.get(
@@ -104,12 +111,19 @@ async def bulk_delete_scholars(
     db_session: AsyncSession = Depends(get_db_session),
     current_user: User = Depends(get_api_current_user),
 ):
-    deleted_count = await scholar_service.bulk_delete_scholars(
-        db_session,
-        user_id=current_user.id,
-        scholar_profile_ids=payload.scholar_profile_ids,
-        upload_dir=settings.scholar_image_upload_dir,
-    )
+    try:
+        deleted_count = await scholar_service.bulk_delete_scholars(
+            db_session,
+            user_id=current_user.id,
+            scholar_profile_ids=payload.scholar_profile_ids,
+            upload_dir=settings.scholar_image_upload_dir,
+        )
+    except scholar_service.ScholarServiceError as exc:
+        raise ApiException(
+            status_code=409,
+            code="scholar_bulk_delete_failed",
+            message=str(exc),
+        ) from exc
     structured_log(
         logger,
         "info",
@@ -331,11 +345,18 @@ async def delete_scholar(
             code="scholar_not_found",
             message="Scholar not found.",
         )
-    await scholar_service.delete_scholar(
-        db_session,
-        profile=profile,
-        upload_dir=settings.scholar_image_upload_dir,
-    )
+    try:
+        await scholar_service.delete_scholar(
+            db_session,
+            profile=profile,
+            upload_dir=settings.scholar_image_upload_dir,
+        )
+    except scholar_service.ScholarServiceError as exc:
+        raise ApiException(
+            status_code=409,
+            code="scholar_delete_failed",
+            message=str(exc),
+        ) from exc
     structured_log(
         logger, "info", "api.scholars.deleted", user_id=current_user.id, scholar_profile_id=scholar_profile_id
     )
diff --git a/app/services/scholars/application.py b/app/services/scholars/application.py
index a19d9de..3496732 100644
--- a/app/services/scholars/application.py
+++ b/app/services/scholars/application.py
@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import os
+from typing import Any
 from uuid import uuid4
 
 from sqlalchemy.exc import IntegrityError
@@ -52,7 +53,11 @@ async def bulk_delete_scholars(
             _safe_remove_upload(upload_root, profile.profile_image_upload_path)
     for profile in profiles:
         await db_session.delete(profile)
-    await db_session.commit()
+    try:
+        await db_session.commit()
+    except IntegrityError as exc:
+        await db_session.rollback()
+        raise ScholarServiceError("Unable to bulk-delete scholars due to a database constraint.") from exc
     return len(profiles)
 
 
@@ -63,9 +68,9 @@ async def bulk_toggle_scholars(
     scholar_profile_ids: list[int],
     is_enabled: bool,
 ) -> int:
-    from sqlalchemy import update
+    from sqlalchemy import CursorResult, update
 
-    cursor = await db_session.execute(
+    cursor: CursorResult[Any] = await db_session.execute(  # type: ignore[assignment]
         update(ScholarProfile)
         .where(
             ScholarProfile.id.in_(scholar_profile_ids),
@@ -74,7 +79,7 @@ async def bulk_toggle_scholars(
         .values(is_enabled=is_enabled)
     )
     await db_session.commit()
-    return int(cursor.rowcount)
+    return int(cursor.rowcount or 0)
 
 
 __all__ = [
@@ -177,7 +182,11 @@ async def delete_scholar(
         _safe_remove_upload(upload_root, profile.profile_image_upload_path)
 
     await db_session.delete(profile)
-    await db_session.commit()
+    try:
+        await db_session.commit()
+    except IntegrityError as exc:
+        await db_session.rollback()
+        raise ScholarServiceError("Unable to delete scholar due to a database constraint.") from exc
 
 
 async def hydrate_profile_metadata(
diff --git a/frontend/src/components/patterns/ScrapeSafetyBadge.test.ts b/frontend/src/components/patterns/ScrapeSafetyBadge.test.ts
new file mode 100644
index 0000000..8d17969
--- /dev/null
+++ b/frontend/src/components/patterns/ScrapeSafetyBadge.test.ts
@@ -0,0 +1,61 @@
+// @vitest-environment happy-dom
+import { describe, expect, it } from "vitest";
+import { mount } from "@vue/test-utils";
+import ScrapeSafetyBadge from "./ScrapeSafetyBadge.vue";
+import { createDefaultSafetyState, type ScrapeSafetyState } from "@/features/safety";
+
+function buildState(overrides: Partial<ScrapeSafetyState> = {}): ScrapeSafetyState {
+  return { ...createDefaultSafetyState(), ...overrides };
+}
+
+describe("ScrapeSafetyBadge", () => {
+  it("shows ready tooltip when cooldown is inactive", () => {
+    const wrapper = mount(ScrapeSafetyBadge, {
+      props: { state: buildState({ cooldown_active: false }) },
+    });
+    expect(wrapper.text()).toContain("Safety ready");
+    const hint = wrapper.findComponent({ name: "AppHelpHint" });
+    expect(hint.exists()).toBe(true);
+    expect(hint.props("text")).toContain("No active cooldown");
+  });
+
+  it("shows cooldown tooltip with reason and action when active", () => {
+    const wrapper = mount(ScrapeSafetyBadge, {
+      props: {
+        state: buildState({
+          cooldown_active: true,
+          cooldown_reason: "blocked_failure_threshold_exceeded",
+          cooldown_reason_label: "Too many blocked requests",
+          recommended_action: "Wait for cooldown to expire",
+          cooldown_remaining_seconds: 120,
+        }),
+      },
+    });
+    expect(wrapper.text()).toContain("Safety cooldown");
+    const hint = wrapper.findComponent({ name: "AppHelpHint" });
+    expect(hint.exists()).toBe(true);
+    const text = hint.props("text") as string;
+    expect(text).toContain("Google Scholar rate-limits");
+    expect(text).toContain("Too many blocked requests");
+    expect(text).toContain("Wait for cooldown to expire");
+  });
+
+  it("shows cooldown tooltip without optional fields", () => {
+    const wrapper = mount(ScrapeSafetyBadge, {
+      props: {
+        state: buildState({
+          cooldown_active: true,
+          cooldown_reason: "some_reason",
+          cooldown_reason_label: null,
+          recommended_action: null,
+          cooldown_remaining_seconds: 60,
+        }),
+      },
+    });
+    const hint = wrapper.findComponent({ name: "AppHelpHint" });
+    const text = hint.props("text") as string;
+    expect(text).toContain("Google Scholar rate-limits");
+    expect(text).not.toContain("Why:");
+    expect(text).not.toContain("Action:");
+  });
+});
diff --git a/frontend/src/components/patterns/ScrapeSafetyBadge.vue b/frontend/src/components/patterns/ScrapeSafetyBadge.vue
index b40c1c9..845fb2f 100644
--- a/frontend/src/components/patterns/ScrapeSafetyBadge.vue
+++ b/frontend/src/components/patterns/ScrapeSafetyBadge.vue
@@ -1,6 +1,7 @@
 <script setup lang="ts">
 import { computed } from "vue";
 
+import AppHelpHint from "@/components/ui/AppHelpHint.vue";
 import { type ScrapeSafetyState } from "@/features/safety";
 
 const props = defineProps<{
@@ -18,10 +19,30 @@ const toneClass = computed(() => {
   }
   return "border-state-warning-border bg-state-warning-bg text-state-warning-text";
 });
+
+const READY_TOOLTIP = "No active cooldown. Scraping can proceed normally.";
+const RATE_LIMIT_INTRO =
+  "Google Scholar rate-limits automated requests. The cooldown pauses scraping to avoid your IP being blocked.";
+
+const tooltipText = computed(() => {
+  if (!props.state.cooldown_active) return READY_TOOLTIP;
+
+  const parts = [RATE_LIMIT_INTRO];
+  if (props.state.cooldown_reason_label) {
+    parts.push(`Why: ${props.state.cooldown_reason_label}`);
+  }
+  if (props.state.recommended_action) {
+    parts.push(`Action: ${props.state.recommended_action}`);
+  }
+  return parts.join(" \u2014 ");
+});
 </script>
 
 <template>
-  <span class="inline-flex items-center rounded-full border px-2 py-0.5 text-xs font-semibold" :class="toneClass">
-    {{ label }}
+  <span class="inline-flex items-center gap-1">
+    <span class="inline-flex items-center rounded-full border px-2 py-0.5 text-xs font-semibold" :class="toneClass">
+      {{ label }}
+    </span>
+    <AppHelpHint :text="tooltipText" />
   </span>
 </template>
diff --git a/frontend/src/components/patterns/ScrapeSafetyBanner.vue b/frontend/src/components/patterns/ScrapeSafetyBanner.vue
index 300b05a..6ea343d 100644
--- a/frontend/src/components/patterns/ScrapeSafetyBanner.vue
+++ b/frontend/src/components/patterns/ScrapeSafetyBanner.vue
@@ -2,6 +2,7 @@
 import { computed, onBeforeUnmount, onMounted, ref } from "vue";
 
 import AppAlert from "@/components/ui/AppAlert.vue";
+import AppHelpHint from "@/components/ui/AppHelpHint.vue";
 import {
   formatCooldownCountdown,
   type ScrapeSafetyState,
@@ -79,6 +80,10 @@ const actionText = computed(() => {
   return props.safetyState.recommended_action;
 });
 
+const bannerHintText = computed(() => {
+  return "Google Scholar rate-limits automated requests. The cooldown pauses scraping to avoid your IP being blocked.";
+});
+
 onMounted(() => {
   timer = setInterval(() => {
     now.value = Date.now();
@@ -95,7 +100,12 @@ onBeforeUnmount(() => {
 
 <template>
   <AppAlert v-if="isVisible" :tone="tone">
-    <template #title>{{ title }}</template>
+    <template #title>
+      <span class="inline-flex items-center gap-1">
+        {{ title }}
+        <AppHelpHint :text="bannerHintText" />
+      </span>
+    </template>
     <p>{{ detailText }}</p>
     <p v-if="actionText" class="text-secondary">{{ actionText }}</p>
   </AppAlert>
diff --git a/frontend/src/components/ui/AppConfirmModal.vue b/frontend/src/components/ui/AppConfirmModal.vue
new file mode 100644
index 0000000..044ca59
--- /dev/null
+++ b/frontend/src/components/ui/AppConfirmModal.vue
@@ -0,0 +1,28 @@
+<script setup lang="ts">
+import AppButton from "@/components/ui/AppButton.vue";
+import AppModal from "@/components/ui/AppModal.vue";
+
+withDefaults(
+  defineProps<{
+    open: boolean;
+    title: string;
+    message: string;
+    confirmLabel?: string;
+    cancelLabel?: string;
+    variant?: "danger" | "default";
+  }>(),
+  { confirmLabel: "Confirm", cancelLabel: "Cancel", variant: "default" },
+);
+
+const emit = defineEmits<{ confirm: []; cancel: [] }>();
+</script>
+
+<template>
+  <AppModal :open="open" :title="title" @close="emit('cancel')">
+    <p class="mb-6 text-sm text-secondary">{{ message }}</p>
+    <div class="flex justify-end gap-2">
+      <AppButton variant="secondary" @click="emit('cancel')">{{ cancelLabel }}</AppButton>
+      <AppButton :variant="variant === 'danger' ? 'danger' : 'primary'" @click="emit('confirm')">{{ confirmLabel }}</AppButton>
+    </div>
+  </AppModal>
+</template>
diff --git a/frontend/src/features/scholars/components/ScholarBatchAdd.test.ts b/frontend/src/features/scholars/components/ScholarBatchAdd.test.ts
index 2d76eac..7b25632 100644
--- a/frontend/src/features/scholars/components/ScholarBatchAdd.test.ts
+++ b/frontend/src/features/scholars/components/ScholarBatchAdd.test.ts
@@ -2,10 +2,144 @@
 import { describe, expect, it } from "vitest";
 import { mount } from "@vue/test-utils";
 import ScholarBatchAdd from "./ScholarBatchAdd.vue";
+import {
+  parseScholarIds,
+  parseScholarTokens,
+  extractScholarIdFromUrl,
+  validateTokenAsId,
+} from "./scholar-batch-parsing";
 
 const defaultProps = { saving: false, loading: false };
 
-describe("ScholarBatchAdd", () => {
+describe("parseScholarIds (unit)", () => {
+  it("parses a single bare ID", () => {
+    expect(parseScholarIds("A-UbBTPM15wL")).toEqual(["A-UbBTPM15wL"]);
+  });
+
+  it("parses multiple IDs separated by commas", () => {
+    expect(parseScholarIds("A-UbBTPM15wL, B-UbBTPM15wL")).toEqual(["A-UbBTPM15wL", "B-UbBTPM15wL"]);
+  });
+
+  it("deduplicates IDs", () => {
+    expect(parseScholarIds("A-UbBTPM15wL\nA-UbBTPM15wL")).toEqual(["A-UbBTPM15wL"]);
+  });
+
+  it("extracts ID from standard Google Scholar URL", () => {
+    expect(parseScholarIds("https://scholar.google.com/citations?hl=en&user=A-UbBTPM15wL")).toEqual(["A-UbBTPM15wL"]);
+  });
+
+  it("extracts ID from URL with trailing slash", () => {
+    expect(parseScholarIds("https://scholar.google.com/citations?user=A-UbBTPM15wL/")).toEqual(["A-UbBTPM15wL"]);
+  });
+
+  it("extracts ID from URL with fragment", () => {
+    expect(parseScholarIds("https://scholar.google.com/citations?user=A-UbBTPM15wL#section")).toEqual(["A-UbBTPM15wL"]);
+  });
+
+  it("extracts ID from URL with extra query params", () => {
+    expect(parseScholarIds("https://scholar.google.com/citations?hl=en&user=A-UbBTPM15wL&view_op=list_works&sortby=pubdate")).toEqual(["A-UbBTPM15wL"]);
+  });
+
+  it("handles URL-encoded characters in non-ID parts", () => {
+    expect(parseScholarIds("https://scholar.google.com/citations?hl=en&user=A-UbBTPM15wL&label=%E4%B8%AD%E6%96%87")).toEqual(["A-UbBTPM15wL"]);
+  });
+
+  it("rejects malformed IDs (too short)", () => {
+    expect(parseScholarIds("ABC123")).toEqual([]);
+  });
+
+  it("rejects malformed IDs (too long)", () => {
+    expect(parseScholarIds("ABCDEF1234567")).toEqual([]);
+  });
+
+  it("rejects IDs with special characters", () => {
+    expect(parseScholarIds("ABCDEF12345!")).toEqual([]);
+  });
+
+  it("rejects IDs with embedded whitespace", () => {
+    expect(parseScholarIds("ABC DEF12345")).toEqual([]);
+  });
+
+  it("handles mixed valid and invalid tokens", () => {
+    expect(parseScholarIds("A-UbBTPM15wL, invalid, B-UbBTPM15wL")).toEqual(["A-UbBTPM15wL", "B-UbBTPM15wL"]);
+  });
+
+  it("returns empty array for empty string", () => {
+    expect(parseScholarIds("")).toEqual([]);
+  });
+
+  it("returns empty array for whitespace only", () => {
+    expect(parseScholarIds("   ")).toEqual([]);
+  });
+});
+
+describe("extractScholarIdFromUrl", () => {
+  it("returns null for non-URL strings", () => {
+    expect(extractScholarIdFromUrl("not-a-url")).toBeNull();
+  });
+
+  it("returns null for URL without user param", () => {
+    expect(extractScholarIdFromUrl("https://scholar.google.com/citations?hl=en")).toBeNull();
+  });
+
+  it("extracts from URL with trailing slashes", () => {
+    expect(extractScholarIdFromUrl("https://scholar.google.com/citations?user=A-UbBTPM15wL///")).toBe("A-UbBTPM15wL");
+  });
+
+  it("strips fragment before parsing", () => {
+    expect(extractScholarIdFromUrl("https://scholar.google.com/citations?user=A-UbBTPM15wL#foo")).toBe("A-UbBTPM15wL");
+  });
+
+  it("returns null when user param is invalid length", () => {
+    expect(extractScholarIdFromUrl("https://scholar.google.com/citations?user=short")).toBeNull();
+  });
+});
+
+describe("validateTokenAsId", () => {
+  it("returns null for valid 12-char ID", () => {
+    expect(validateTokenAsId("ABCDEF123456")).toBeNull();
+  });
+
+  it("detects wrong length", () => {
+    expect(validateTokenAsId("ABC")).toContain("12 characters");
+  });
+
+  it("detects invalid characters", () => {
+    expect(validateTokenAsId("ABCDEF12345!")).toContain("invalid characters");
+  });
+
+  it("detects whitespace", () => {
+    expect(validateTokenAsId("ABC DEF12345")).toContain("whitespace");
+  });
+
+  it("detects empty input", () => {
+    expect(validateTokenAsId("")).toContain("empty");
+  });
+});
+
+describe("parseScholarTokens (per-token errors)", () => {
+  it("marks invalid tokens with error messages", () => {
+    const tokens = parseScholarTokens("A-UbBTPM15wL, short, B-UbBTPM15wL");
+    expect(tokens).toHaveLength(3);
+    expect(tokens[0].id).toBe("A-UbBTPM15wL");
+    expect(tokens[0].error).toBeNull();
+    expect(tokens[1].id).toBeNull();
+    expect(tokens[1].error).toContain("12 characters");
+    expect(tokens[2].id).toBe("B-UbBTPM15wL");
+  });
+
+  it("marks duplicate tokens", () => {
+    const tokens = parseScholarTokens("A-UbBTPM15wL, A-UbBTPM15wL");
+    expect(tokens[1].error).toBe("duplicate");
+  });
+
+  it("marks bad URL tokens", () => {
+    const tokens = parseScholarTokens("https://scholar.google.com/citations?hl=en");
+    expect(tokens[0].error).toContain("could not extract");
+  });
+});
+
+describe("ScholarBatchAdd (component)", () => {
   it("renders the heading and input", () => {
     const wrapper = mount(ScholarBatchAdd, { props: defaultProps });
     expect(wrapper.text()).toContain("Add Scholar Profiles");
@@ -73,4 +207,18 @@ describe("ScholarBatchAdd", () => {
     const wrapper = mount(ScholarBatchAdd, { props: { ...defaultProps, saving: true } });
     expect(wrapper.text()).toContain("Adding...");
   });
+
+  it("shows validation errors for invalid tokens", async () => {
+    const wrapper = mount(ScholarBatchAdd, { props: defaultProps });
+    await wrapper.find("textarea").setValue("A-UbBTPM15wL, bad!");
+    const errors = wrapper.find("[data-testid='validation-errors']");
+    expect(errors.exists()).toBe(true);
+  });
+
+  it("shows skipped count alongside valid count", async () => {
+    const wrapper = mount(ScholarBatchAdd, { props: defaultProps });
+    await wrapper.find("textarea").setValue("A-UbBTPM15wL, tooshort");
+    expect(wrapper.text()).toContain("1 valid");
+    expect(wrapper.text()).toContain("1 skipped");
+  });
 });
diff --git a/frontend/src/features/scholars/components/ScholarBatchAdd.vue b/frontend/src/features/scholars/components/ScholarBatchAdd.vue
index bfafbda..60f89b9 100644
--- a/frontend/src/features/scholars/components/ScholarBatchAdd.vue
+++ b/frontend/src/features/scholars/components/ScholarBatchAdd.vue
@@ -3,6 +3,7 @@ import { computed, ref } from "vue";
 import AppButton from "@/components/ui/AppButton.vue";
 import AppCard from "@/components/ui/AppCard.vue";
 import AppHelpHint from "@/components/ui/AppHelpHint.vue";
+import { parseScholarTokens } from "./scholar-batch-parsing";
 
 defineProps<{
   saving: boolean;
@@ -15,38 +16,13 @@ const emit = defineEmits<{
 
 const scholarBatchInput = ref("");
 
-const SCHOLAR_ID_PATTERN = /^[a-zA-Z0-9_-]{12}$/;
-const URL_USER_PARAM_PATTERN = /(?:\?|&)user=([a-zA-Z0-9_-]{12})(?:&|#|$)/i;
-
-function parseScholarIds(raw: string): string[] {
-  const ordered: string[] = [];
-  const seen = new Set<string>();
-  const tokens = raw.split(/[\s,;]+/).map((v) => v.trim()).filter((v) => v.length > 0);
-  for (const token of tokens) {
-    let candidate: string | null = null;
-    if (SCHOLAR_ID_PATTERN.test(token)) candidate = token;
-    if (!candidate) {
-      const directParamMatch = token.match(URL_USER_PARAM_PATTERN);
-      if (directParamMatch) candidate = directParamMatch[1];
-    }
-    if (!candidate && token.includes("scholar.google")) {
-      try {
-        const parsed = new URL(token);
-        const userParam = parsed.searchParams.get("user");
-        if (userParam && SCHOLAR_ID_PATTERN.test(userParam)) candidate = userParam;
-      } catch (_error) { /* Ignore non-URL tokens. */ }
-    }
-    if (!candidate || seen.has(candidate)) continue;
-    seen.add(candidate);
-    ordered.push(candidate);
-  }
-  return ordered;
-}
-
-const parsedBatchCount = computed(() => parseScholarIds(scholarBatchInput.value).length);
+const parsedTokens = computed(() => parseScholarTokens(scholarBatchInput.value));
+const validIds = computed(() => parsedTokens.value.filter((t) => t.id !== null));
+const invalidTokens = computed(() => parsedTokens.value.filter((t) => t.id === null));
+const parsedBatchCount = computed(() => validIds.value.length);
 
 function onSubmit(): void {
-  const ids = parseScholarIds(scholarBatchInput.value);
+  const ids = validIds.value.map((t) => t.id!);
   if (ids.length > 0) {
     emit("add-scholars", ids);
     scholarBatchInput.value = "";
@@ -76,11 +52,33 @@ function onSubmit(): void {
         />
       </label>
 
-      <div class="flex flex-wrap items-center justify-between gap-2">
+      <div v-if="parsedTokens.length > 0" class="space-y-1">
         <p class="text-xs text-secondary">
-          Parsed IDs: <strong class="text-ink-primary">{{ parsedBatchCount }}</strong>
+          <strong class="text-ink-primary">{{ parsedBatchCount }}</strong> valid ID{{ parsedBatchCount === 1 ? "" : "s" }}
+          <template v-if="invalidTokens.length > 0">
+            · <span class="text-state-warning-text">{{ invalidTokens.length }} skipped</span>
+          </template>
         </p>
-        <AppButton type="submit" :disabled="saving || loading">
+        <ul v-if="invalidTokens.length > 0" class="space-y-0.5" data-testid="validation-errors">
+          <li
+            v-for="item in invalidTokens.slice(0, 5)"
+            :key="item.index"
+            class="text-xs text-state-warning-text"
+          >
+            #{{ item.index }}: {{ item.error }}
+            <code class="ml-1 break-all text-ink-muted">{{ item.raw.length > 60 ? item.raw.slice(0, 57) + "..." : item.raw }}</code>
+          </li>
+          <li v-if="invalidTokens.length > 5" class="text-xs text-state-warning-text">
+            +{{ invalidTokens.length - 5 }} more skipped
+          </li>
+        </ul>
+      </div>
+      <div v-else class="text-xs text-secondary">
+        Parsed IDs: <strong class="text-ink-primary">0</strong>
+      </div>
+
+      <div class="flex flex-wrap items-center justify-end gap-2">
+        <AppButton type="submit" :disabled="saving || loading || parsedBatchCount === 0">
           {{ saving ? "Adding..." : "Add scholars" }}
         </AppButton>
       </div>
diff --git a/frontend/src/features/scholars/components/ScholarSettingsModal.vue b/frontend/src/features/scholars/components/ScholarSettingsModal.vue
index 4a129f8..77af0ac 100644
--- a/frontend/src/features/scholars/components/ScholarSettingsModal.vue
+++ b/frontend/src/features/scholars/components/ScholarSettingsModal.vue
@@ -47,7 +47,14 @@ function scholarPublicationsRoute(profile: ScholarProfile): { name: string; quer
           :image-url="scholar.profile_image_url"
         />
         <div class="min-w-0 space-y-1">
-          <p class="truncate text-sm font-semibold text-ink-primary">{{ scholarLabel(scholar) }}</p>
+          <p class="truncate text-sm font-semibold text-ink-primary">
+            {{ scholarLabel(scholar) }}
+            <span
+              v-if="!scholar.baseline_completed"
+              class="ml-1.5 inline-flex items-center rounded-full border border-state-warning-border bg-state-warning-bg px-1.5 py-0.5 text-[10px] font-medium text-state-warning-text"
+              title="This scholar hasn't been scraped yet. Publications will appear after the next run."
+            >Pending</span>
+          </p>
           <p class="text-xs text-secondary">ID: <code>{{ scholar.scholar_id }}</code></p>
           <div class="flex flex-wrap items-center gap-3">
             <RouterLink :to="scholarPublicationsRoute(scholar)" class="link-inline text-xs">
diff --git a/frontend/src/features/scholars/components/ScholarStatusBadges.vue b/frontend/src/features/scholars/components/ScholarStatusBadges.vue
new file mode 100644
index 0000000..86b2cd5
--- /dev/null
+++ b/frontend/src/features/scholars/components/ScholarStatusBadges.vue
@@ -0,0 +1,29 @@
+<script setup lang="ts">
+defineProps<{
+  baselineCompleted: boolean;
+  lastRunStatus: string | null;
+}>();
+</script>
+
+<template>
+  <span
+    v-if="!baselineCompleted"
+    class="ml-1.5 inline-flex items-center rounded-full border border-state-warning-border bg-state-warning-bg px-1.5 py-0.5 text-[10px] font-medium text-state-warning-text"
+    title="This scholar hasn't been scraped yet. Publications will appear after the next run."
+  >Pending</span>
+  <span
+    v-if="lastRunStatus === 'failed'"
+    class="ml-1.5 inline-flex items-center rounded-full border border-state-danger-border bg-state-danger-bg px-1.5 py-0.5 text-[10px] font-medium text-state-danger-text"
+    title="The last scrape run for this scholar failed."
+  >Failed</span>
+  <span
+    v-else-if="lastRunStatus === 'partial'"
+    class="ml-1.5 inline-flex items-center rounded-full border border-state-warning-border bg-state-warning-bg px-1.5 py-0.5 text-[10px] font-medium text-state-warning-text"
+    title="The last scrape run for this scholar completed with partial results."
+  >Partial</span>
+  <span
+    v-else-if="lastRunStatus === 'success'"
+    class="ml-1.5 inline-flex items-center rounded-full border border-state-success-border bg-state-success-bg px-1.5 py-0.5 text-[10px] font-medium text-state-success-text"
+    title="The last scrape run for this scholar completed successfully."
+  >OK</span>
+</template>
diff --git a/frontend/src/features/scholars/components/scholar-batch-parsing.ts b/frontend/src/features/scholars/components/scholar-batch-parsing.ts
new file mode 100644
index 0000000..45baba7
--- /dev/null
+++ b/frontend/src/features/scholars/components/scholar-batch-parsing.ts
@@ -0,0 +1,76 @@
+const SCHOLAR_ID_PATTERN = /^[a-zA-Z0-9_-]{12}$/;
+
+export interface ParsedToken {
+  index: number;
+  raw: string;
+  id: string | null;
+  error: string | null;
+}
+
+export function extractScholarIdFromUrl(token: string): string | null {
+  const cleaned = token.replace(/\/+$/, "").replace(/#.*$/, "");
+  try {
+    const parsed = new URL(cleaned);
+    const userParam = parsed.searchParams.get("user");
+    if (!userParam) return null;
+    const decoded = decodeURIComponent(userParam).trim();
+    if (SCHOLAR_ID_PATTERN.test(decoded)) return decoded;
+    return null;
+  } catch {
+    return null;
+  }
+}
+
+export function validateTokenAsId(token: string): string | null {
+  const trimmed = token.trim();
+  if (!trimmed) return "empty input";
+  if (/\s/.test(trimmed)) return "contains whitespace";
+  if (trimmed.length !== 12) return `must be 12 characters (got ${trimmed.length})`;
+  if (!/^[a-zA-Z0-9_-]+$/.test(trimmed)) {
+    return "contains invalid characters (only a-z, A-Z, 0-9, _ and - allowed)";
+  }
+  return null;
+}
+
+export function parseScholarTokens(raw: string): ParsedToken[] {
+  const tokens = raw.split(/[\s,;]+/).map((v) => v.trim()).filter((v) => v.length > 0);
+  const results: ParsedToken[] = [];
+  const seen = new Set<string>();
+
+  for (let i = 0; i < tokens.length; i++) {
+    const token = tokens[i];
+
+    if (SCHOLAR_ID_PATTERN.test(token)) {
+      if (seen.has(token)) {
+        results.push({ index: i + 1, raw: token, id: null, error: "duplicate" });
+        continue;
+      }
+      seen.add(token);
+      results.push({ index: i + 1, raw: token, id: token, error: null });
+      continue;
+    }
+
+    if (token.includes("scholar.google") || token.startsWith("http")) {
+      const extracted = extractScholarIdFromUrl(token);
+      if (extracted) {
+        if (seen.has(extracted)) {
+          results.push({ index: i + 1, raw: token, id: null, error: "duplicate" });
+          continue;
+        }
+        seen.add(extracted);
+        results.push({ index: i + 1, raw: token, id: extracted, error: null });
+        continue;
+      }
+      results.push({ index: i + 1, raw: token, id: null, error: "could not extract scholar ID from URL" });
+      continue;
+    }
+
+    const reason = validateTokenAsId(token);
+    results.push({ index: i + 1, raw: token, id: null, error: reason ?? "invalid scholar ID" });
+  }
+  return results;
+}
+
+export function parseScholarIds(raw: string): string[] {
+  return parseScholarTokens(raw).filter((t) => t.id !== null).map((t) => t.id!);
+}
diff --git a/frontend/src/features/scholars/composables/useScholarBulkActions.test.ts b/frontend/src/features/scholars/composables/useScholarBulkActions.test.ts
index 868aad6..5a8dff9 100644
--- a/frontend/src/features/scholars/composables/useScholarBulkActions.test.ts
+++ b/frontend/src/features/scholars/composables/useScholarBulkActions.test.ts
@@ -109,4 +109,40 @@ describe("useScholarBulkActions", () => {
     await bulk.onApplyBulkAction();
     expect(bulk.selectedIds.value.size).toBe(0);
   });
+
+  it("bulk delete calls assignError on network failure", async () => {
+    const { bulkDeleteScholars } = await import("@/features/scholars");
+    vi.mocked(bulkDeleteScholars).mockRejectedValueOnce(new Error("Network error"));
+
+    const { bulk, callbacks } = setup([makeProfile(1, "Alice")]);
+    bulk.onToggleRow(1, { target: { checked: true } } as unknown as Event);
+    bulk.bulkAction.value = "delete_selected" as ScholarBulkAction;
+    await bulk.onApplyBulkAction();
+
+    // Trigger the confirm callback
+    expect(bulk.confirmState.value.open).toBe(true);
+    await bulk.confirmState.value.onConfirm();
+
+    expect(callbacks.assignError).toHaveBeenCalledWith(
+      expect.any(Error),
+      "Unable to bulk delete scholars.",
+    );
+    expect(bulk.bulkBusy.value).toBe(false);
+  });
+
+  it("bulk toggle calls assignError on network failure", async () => {
+    const { bulkToggleScholars } = await import("@/features/scholars");
+    vi.mocked(bulkToggleScholars).mockRejectedValueOnce(new Error("Network error"));
+
+    const { bulk, callbacks } = setup([makeProfile(1, "Alice")]);
+    bulk.onToggleRow(1, { target: { checked: true } } as unknown as Event);
+    bulk.bulkAction.value = "enable_selected" as ScholarBulkAction;
+    await bulk.onApplyBulkAction();
+
+    expect(callbacks.assignError).toHaveBeenCalledWith(
+      expect.any(Error),
+      "Unable to bulk enable scholars.",
+    );
+    expect(bulk.bulkBusy.value).toBe(false);
+  });
 });
diff --git a/frontend/src/features/scholars/composables/useScholarBulkActions.ts b/frontend/src/features/scholars/composables/useScholarBulkActions.ts
index f4910a7..51cace7 100644
--- a/frontend/src/features/scholars/composables/useScholarBulkActions.ts
+++ b/frontend/src/features/scholars/composables/useScholarBulkActions.ts
@@ -6,7 +6,6 @@ import {
   exportScholarData,
   type ScholarProfile,
 } from "@/features/scholars";
-import { ApiRequestError } from "@/lib/api/errors";
 
 export type ScholarBulkAction =
   | "delete_selected"
@@ -21,6 +20,14 @@ export interface ScholarBulkActionOption {
   label: string;
 }
 
+export interface ConfirmState {
+  open: boolean;
+  title: string;
+  message: string;
+  variant: "danger" | "default";
+  onConfirm: () => void;
+}
+
 export interface BulkActionCallbacks {
   clearMessages: () => void;
   assignError: (error: unknown, fallback: string) => void;
@@ -35,6 +42,7 @@ export function useScholarBulkActions(
   const selectedIds = ref<Set<number>>(new Set());
   const bulkAction = ref<ScholarBulkAction>("select_all");
   const bulkBusy = ref(false);
+  const confirmState = ref<ConfirmState>({ open: false, title: "", message: "", variant: "default", onConfirm: () => {} });
 
   const selectedCount = computed(() => selectedIds.value.size);
   const hasSelection = computed(() => selectedCount.value > 0);
@@ -128,21 +136,36 @@ export function useScholarBulkActions(
     if (bulkAction.value === "export_selected") { await onBulkExport(); return; }
   }
 
-  async function onBulkDelete(): Promise<void> {
+  function dismissConfirm(): void {
+    confirmState.value = { ...confirmState.value, open: false };
+  }
+
+  function requestConfirm(title: string, message: string, variant: "danger" | "default", onConfirm: () => void): void {
+    confirmState.value = { open: true, title, message, variant, onConfirm };
+  }
+
+  function onBulkDelete(): void {
     const ids = [...selectedIds.value];
-    if (!window.confirm(`Delete ${ids.length} scholar(s)? This removes all linked publications and queue data.`)) return;
-    bulkBusy.value = true;
-    callbacks.clearMessages();
-    try {
-      const result = await bulkDeleteScholars(ids);
-      callbacks.setSuccess(`${result.deleted_count} scholar(s) deleted.`);
-      selectedIds.value = new Set();
-      await callbacks.reloadScholars();
-    } catch (error) {
-      callbacks.assignError(error, "Unable to bulk delete scholars.");
-    } finally {
-      bulkBusy.value = false;
-    }
+    requestConfirm(
+      `Delete ${ids.length} scholar(s)?`,
+      "This removes all linked publications and queue data. This action cannot be undone.",
+      "danger",
+      async () => {
+        dismissConfirm();
+        bulkBusy.value = true;
+        callbacks.clearMessages();
+        try {
+          const result = await bulkDeleteScholars(ids);
+          callbacks.setSuccess(`${result.deleted_count} scholar(s) deleted.`);
+          selectedIds.value = new Set();
+          await callbacks.reloadScholars();
+        } catch (error) {
+          callbacks.assignError(error, "Unable to bulk delete scholars.");
+        } finally {
+          bulkBusy.value = false;
+        }
+      },
+    );
   }
 
   async function onBulkToggle(isEnabled: boolean): Promise<void> {
@@ -188,6 +211,9 @@ export function useScholarBulkActions(
     bulkActionOptions,
     bulkApplyLabel,
     bulkApplyDisabled,
+    confirmState,
+    dismissConfirm,
+    requestConfirm,
     onToggleAll,
     onToggleRow,
     onApplyBulkAction,
diff --git a/frontend/src/features/settings/SettingsAdminPanel.test.ts b/frontend/src/features/settings/SettingsAdminPanel.test.ts
new file mode 100644
index 0000000..47a9e96
--- /dev/null
+++ b/frontend/src/features/settings/SettingsAdminPanel.test.ts
@@ -0,0 +1,94 @@
+// @vitest-environment happy-dom
+import { describe, expect, it, vi, beforeEach } from "vitest";
+import { mount, flushPromises } from "@vue/test-utils";
+import { nextTick } from "vue";
+import SettingsAdminPanel from "./SettingsAdminPanel.vue";
+
+vi.mock("@/features/admin_users", () => ({
+  listAdminUsers: vi.fn().mockResolvedValue([]),
+  createAdminUser: vi.fn(),
+  setAdminUserActive: vi.fn(),
+  resetAdminUserPassword: vi.fn(),
+}));
+
+vi.mock("@/features/admin_dbops", () => ({
+  getAdminDbIntegrityReport: vi.fn().mockResolvedValue({
+    status: "ok",
+    warnings: [],
+    failures: [],
+    checked_at: null,
+    checks: [],
+  }),
+  listAdminPdfQueue: vi.fn().mockResolvedValue({
+    items: [],
+    total_count: 0,
+    has_next: false,
+    has_prev: false,
+    page: 1,
+    page_size: 50,
+  }),
+  requeueAdminPdfLookup: vi.fn(),
+  requeueAllAdminPdfLookups: vi.fn(),
+}));
+
+vi.mock("@/stores/auth", () => ({
+  useAuthStore: () => ({ isAdmin: true }),
+}));
+
+vi.mock("@/features/admin_repairs", () => ({
+  listAdminRepairTasks: vi.fn().mockResolvedValue([]),
+  runAdminRepairTask: vi.fn(),
+}));
+
+import { listAdminUsers } from "@/features/admin_users";
+import { getAdminDbIntegrityReport, listAdminPdfQueue } from "@/features/admin_dbops";
+
+const mockedListUsers = vi.mocked(listAdminUsers);
+const mockedGetReport = vi.mocked(getAdminDbIntegrityReport);
+const mockedListPdfQueue = vi.mocked(listAdminPdfQueue);
+
+describe("SettingsAdminPanel", () => {
+  beforeEach(() => {
+    mockedListUsers.mockClear();
+    mockedGetReport.mockClear();
+    mockedListPdfQueue.mockClear();
+  });
+
+  it("calls load on users section after nextTick when section=users", async () => {
+    mount(SettingsAdminPanel, { props: { section: "users" } });
+    await nextTick();
+    await nextTick();
+    await flushPromises();
+    expect(mockedListUsers).toHaveBeenCalled();
+  });
+
+  it("calls load on integrity section after nextTick when section=integrity", async () => {
+    mount(SettingsAdminPanel, { props: { section: "integrity" } });
+    await nextTick();
+    await nextTick();
+    await flushPromises();
+    expect(mockedGetReport).toHaveBeenCalled();
+  });
+
+  it("calls load on new section when section prop changes", async () => {
+    const wrapper = mount(SettingsAdminPanel, { props: { section: "users" } });
+    await nextTick();
+    await nextTick();
+    await flushPromises();
+    mockedListUsers.mockClear();
+    mockedGetReport.mockClear();
+
+    await wrapper.setProps({ section: "integrity" });
+    await nextTick();
+    await flushPromises();
+    expect(mockedGetReport).toHaveBeenCalled();
+  });
+
+  it("calls load on pdf section when section=pdf", async () => {
+    mount(SettingsAdminPanel, { props: { section: "pdf" } });
+    await nextTick();
+    await nextTick();
+    await flushPromises();
+    expect(mockedListPdfQueue).toHaveBeenCalled();
+  });
+});
diff --git a/frontend/src/features/settings/SettingsAdminPanel.vue b/frontend/src/features/settings/SettingsAdminPanel.vue
index 6e7e326..d7ee685 100644
--- a/frontend/src/features/settings/SettingsAdminPanel.vue
+++ b/frontend/src/features/settings/SettingsAdminPanel.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { onMounted, watch } from "vue";
+import { nextTick, onMounted, watch } from "vue";
 import { ref } from "vue";
 
 import RequestStateAlerts from "@/components/patterns/RequestStateAlerts.vue";
@@ -25,7 +25,10 @@ const integrityRef = ref<InstanceType<typeof AdminIntegritySection> | null>(null
 const repairsRef = ref<InstanceType<typeof AdminRepairsSection> | null>(null);
 const pdfQueueRef = ref<InstanceType<typeof AdminPdfQueueSection> | null>(null);
 
+let loadGeneration = 0;
+
 async function loadSection(): Promise<void> {
+  const gen = ++loadGeneration;
   clearAlerts();
   try {
     if (props.section === SECTION_USERS && usersRef.value) {
@@ -34,17 +37,21 @@ async function loadSection(): Promise<void> {
       await integrityRef.value.load();
     } else if (props.section === SECTION_REPAIRS) {
       await usersRef.value?.load();
+      if (gen !== loadGeneration) return;
       await repairsRef.value?.load();
     } else if (props.section === SECTION_PDF && pdfQueueRef.value) {
       await pdfQueueRef.value.load();
     }
   } catch (error) {
+    if (gen !== loadGeneration) return;
     assignError(error, "Unable to load admin data.");
   }
 }
 
-onMounted(loadSection);
-watch(() => props.section, loadSection);
+onMounted(() => {
+  nextTick(loadSection);
+});
+watch(() => props.section, loadSection, { flush: "post" });
 </script>
 
 <template>
diff --git a/frontend/src/pages/DashboardPage.vue b/frontend/src/pages/DashboardPage.vue
index c7da221..3f7df35 100644
--- a/frontend/src/pages/DashboardPage.vue
+++ b/frontend/src/pages/DashboardPage.vue
@@ -494,6 +494,11 @@ watch(
                       <template v-else>
                         Processed {{ displayedLatestRun.scholar_count }} scholars and discovered
                         {{ displayedLatestRun.new_publication_count }} new publications.
+                        <template v-if="displayedLatestRun.failed_count > 0 || displayedLatestRun.partial_count > 0">
+                          <span class="text-state-warning-text">
+                            {{ displayedLatestRun.failed_count > 0 ? `${displayedLatestRun.failed_count} failed` : "" }}{{ displayedLatestRun.failed_count > 0 && displayedLatestRun.partial_count > 0 ? ", " : "" }}{{ displayedLatestRun.partial_count > 0 ? `${displayedLatestRun.partial_count} partial` : "" }}.
+                          </span>
+                        </template>
                       </template>
                     </p>
                   </div>
@@ -527,6 +532,9 @@ watch(
                         </div>
                         <span class="text-xs text-secondary">
                           {{ formatDate(run.start_dt) }} • {{ run.new_publication_count }} new
+                          <template v-if="run.failed_count > 0">
+                            • <span class="text-state-warning-text">{{ run.failed_count }} failed</span>
+                          </template>
                         </span>
                       </li>
                     </ul>
diff --git a/frontend/src/pages/ScholarsPage.vue b/frontend/src/pages/ScholarsPage.vue
index 6b9f59a..3899888 100644
--- a/frontend/src/pages/ScholarsPage.vue
+++ b/frontend/src/pages/ScholarsPage.vue
@@ -6,6 +6,7 @@ import AsyncStateGate from "@/components/patterns/AsyncStateGate.vue";
 import RequestStateAlerts from "@/components/patterns/RequestStateAlerts.vue";
 import AppButton from "@/components/ui/AppButton.vue";
 import AppCard from "@/components/ui/AppCard.vue";
+import AppConfirmModal from "@/components/ui/AppConfirmModal.vue";
 import AppEmptyState from "@/components/ui/AppEmptyState.vue";
 import AppHelpHint from "@/components/ui/AppHelpHint.vue";
 import AppInput from "@/components/ui/AppInput.vue";
@@ -32,6 +33,7 @@ import ScholarAvatar from "@/features/scholars/components/ScholarAvatar.vue";
 import ScholarBatchAdd from "@/features/scholars/components/ScholarBatchAdd.vue";
 import ScholarNameSearch from "@/features/scholars/components/ScholarNameSearch.vue";
 import ScholarSettingsModal from "@/features/scholars/components/ScholarSettingsModal.vue";
+import ScholarStatusBadges from "@/features/scholars/components/ScholarStatusBadges.vue";
 import { ApiRequestError } from "@/lib/api/errors";
 import { useRunStatusStore } from "@/stores/run_status";
 
@@ -271,23 +273,30 @@ async function onToggleScholar(): Promise<void> {
   }
 }
 
-async function onDeleteScholar(): Promise<void> {
+function onDeleteScholar(): void {
   const profile = activeScholarSettings.value;
   if (!profile) return;
   const label = scholarLabel(profile);
-  if (!window.confirm(`Delete scholar ${label}? This removes all linked publications and queue data.`)) return;
-  activeScholarId.value = profile.id;
-  clearMessages();
-  try {
-    await deleteScholar(profile.id);
-    successMessage.value = `${label} deleted.`;
-    activeScholarSettingsId.value = null;
-    await loadScholars();
-  } catch (error) {
-    assignError(error, "Unable to delete scholar.");
-  } finally {
-    activeScholarId.value = null;
-  }
+  bulk.requestConfirm(
+    `Delete ${label}?`,
+    "This removes all linked publications and queue data. This action cannot be undone.",
+    "danger",
+    async () => {
+      bulk.dismissConfirm();
+      activeScholarId.value = profile.id;
+      clearMessages();
+      try {
+        await deleteScholar(profile.id);
+        successMessage.value = `${label} deleted.`;
+        activeScholarSettingsId.value = null;
+        await loadScholars();
+      } catch (error) {
+        assignError(error, "Unable to delete scholar.");
+      } finally {
+        activeScholarId.value = null;
+      }
+    },
+  );
 }
 
 async function onSaveImageUrl(): Promise<void> {
@@ -510,7 +519,10 @@ watch(
                       />
                       <ScholarAvatar :label="item.display_name" :scholar-id="item.scholar_id" :image-url="item.profile_image_url" />
                       <div class="min-w-0 flex-1 space-y-1">
-                        <p class="truncate text-sm font-semibold text-ink-primary">{{ scholarLabel(item) }}</p>
+                        <p class="truncate text-sm font-semibold text-ink-primary">
+                          {{ scholarLabel(item) }}
+                          <ScholarStatusBadges :baseline-completed="item.baseline_completed" :last-run-status="item.last_run_status" />
+                        </p>
                         <div class="flex flex-wrap items-center gap-3">
                           <RouterLink :to="scholarPublicationsRoute(item)" class="link-inline text-xs">Publications</RouterLink>
                           <a :href="scholarProfileUrl(item.scholar_id)" target="_blank" rel="noreferrer" class="link-inline text-xs">Open profile</a>
@@ -553,7 +565,10 @@ watch(
                           <div class="flex items-start gap-3">
                             <ScholarAvatar :label="item.display_name" :scholar-id="item.scholar_id" :image-url="item.profile_image_url" />
                             <div class="grid min-w-0 gap-1">
-                              <strong class="truncate text-ink-primary">{{ scholarLabel(item) }}</strong>
+                              <strong class="truncate text-ink-primary">
+                                {{ scholarLabel(item) }}
+                                <ScholarStatusBadges :baseline-completed="item.baseline_completed" :last-run-status="item.last_run_status" />
+                              </strong>
                               <div class="flex flex-wrap items-center gap-3">
                                 <RouterLink :to="scholarPublicationsRoute(item)" class="link-inline text-xs">Publications</RouterLink>
                                 <a :href="scholarProfileUrl(item.scholar_id)" target="_blank" rel="noreferrer" class="link-inline text-xs">Open profile</a>
@@ -590,6 +605,16 @@ watch(
       @toggle="onToggleScholar"
       @delete="onDeleteScholar"
     />
+
+    <AppConfirmModal
+      :open="bulk.confirmState.value.open"
+      :title="bulk.confirmState.value.title"
+      :message="bulk.confirmState.value.message"
+      :variant="bulk.confirmState.value.variant"
+      confirm-label="Delete"
+      @confirm="bulk.confirmState.value.onConfirm()"
+      @cancel="bulk.dismissConfirm()"
+    />
   </AppPage>
 </template>
 
diff --git a/frontend/src/pages/SettingsPage.vue b/frontend/src/pages/SettingsPage.vue
index e1c0e2b..3fb50fc 100644
--- a/frontend/src/pages/SettingsPage.vue
+++ b/frontend/src/pages/SettingsPage.vue
@@ -168,6 +168,11 @@ function parseBoundedInteger(value: string, label: string, minimum: number): num
   return parsed;
 }
 
+function formatHours(minutes: number): string {
+  const h = minutes / 60;
+  return Number.isInteger(h) ? String(h) : h.toFixed(2).replace(/\.?0+$/, "");
+}
+
 function parseHoursToMinutes(value: string, minMinutes: number): number {
   const hours = Number(value);
   if (!Number.isFinite(hours) || hours <= 0) {
@@ -175,7 +180,7 @@ function parseHoursToMinutes(value: string, minMinutes: number): number {
   }
   const minutes = Math.round(hours * 60);
   if (minutes < minMinutes) {
-    throw new Error(`Check interval must be at least ${minMinutes / 60} hours.`);
+    throw new Error(`Check interval must be at least ${formatHours(minMinutes)} hours.`);
   }
   return minutes;
 }
@@ -372,7 +377,7 @@ onMounted(async () => {
                 <AppHelpHint text="Minimum is controlled by server policy." />
               </span>
               <AppInput v-model="runIntervalHours" inputmode="decimal" />
-              <span class="text-xs text-secondary">Minimum: {{ minCheckIntervalMinutes / 60 }} hours</span>
+              <span class="text-xs text-secondary">Minimum: {{ formatHours(minCheckIntervalMinutes) }} hours</span>
             </label>
 
             <label class="grid gap-2 text-sm font-medium text-ink-secondary">
diff --git a/tests/integration/test_api_scholars.py b/tests/integration/test_api_scholars.py
index 0d6f3a0..1fd8ba9 100644
--- a/tests/integration/test_api_scholars.py
+++ b/tests/integration/test_api_scholars.py
@@ -70,6 +70,110 @@ async def test_api_scholars_crud_flow(db_session: AsyncSession) -> None:
     assert delete_response.json()["data"]["message"] == "Scholar deleted."
 
 
+@pytest.mark.integration
+@pytest.mark.db
+@pytest.mark.asyncio
+async def test_api_delete_scholar_returns_404_for_nonexistent(db_session: AsyncSession) -> None:
+    await insert_user(
+        db_session,
+        email="api-delete-404@example.com",
+        password="api-password",
+    )
+
+    client = TestClient(app)
+    login_user(client, email="api-delete-404@example.com", password="api-password")
+    headers = api_csrf_headers(client)
+
+    response = client.delete("/api/v1/scholars/999999", headers=headers)
+    assert response.status_code == 404
+    assert response.json()["error"]["code"] == "scholar_not_found"
+
+
+@pytest.mark.integration
+@pytest.mark.db
+@pytest.mark.asyncio
+async def test_api_delete_scholar_cascades_linked_publications(db_session: AsyncSession) -> None:
+    user_id = await insert_user(
+        db_session,
+        email="api-delete-cascade@example.com",
+        password="api-password",
+    )
+    scholar_result = await db_session.execute(
+        text(
+            """
+            INSERT INTO scholar_profiles (user_id, scholar_id, display_name, is_enabled)
+            VALUES (:user_id, :scholar_id, :display_name, true)
+            RETURNING id
+            """
+        ),
+        {"user_id": user_id, "scholar_id": "delCASCADE01", "display_name": "Cascade Test"},
+    )
+    scholar_profile_id = int(scholar_result.scalar_one())
+    pub_result = await db_session.execute(
+        text(
+            """
+            INSERT INTO publications (fingerprint_sha256, title_raw, title_normalized, citation_count)
+            VALUES (:fingerprint, :title_raw, :title_normalized, 0)
+            RETURNING id
+            """
+        ),
+        {
+            "fingerprint": f"{(user_id + 7000):064x}",
+            "title_raw": "Cascade Publication",
+            "title_normalized": "cascadepublication",
+        },
+    )
+    publication_id = int(pub_result.scalar_one())
+    await db_session.execute(
+        text(
+            """
+            INSERT INTO scholar_publications (scholar_profile_id, publication_id, is_read)
+            VALUES (:scholar_profile_id, :publication_id, false)
+            """
+        ),
+        {"scholar_profile_id": scholar_profile_id, "publication_id": publication_id},
+    )
+    await db_session.commit()
+
+    client = TestClient(app)
+    login_user(client, email="api-delete-cascade@example.com", password="api-password")
+    headers = api_csrf_headers(client)
+
+    delete_response = client.delete(f"/api/v1/scholars/{scholar_profile_id}", headers=headers)
+    assert delete_response.status_code == 200
+    assert delete_response.json()["data"]["message"] == "Scholar deleted."
+
+    link_result = await db_session.execute(
+        text("SELECT count(*) FROM scholar_publications WHERE scholar_profile_id = :id"),
+        {"id": scholar_profile_id},
+    )
+    assert int(link_result.scalar_one()) == 0
+
+
+@pytest.mark.integration
+@pytest.mark.db
+@pytest.mark.asyncio
+async def test_api_create_scholar_rejects_corrupted_id(db_session: AsyncSession) -> None:
+    await insert_user(
+        db_session,
+        email="api-bad-id@example.com",
+        password="api-password",
+    )
+
+    client = TestClient(app)
+    login_user(client, email="api-bad-id@example.com", password="api-password")
+    headers = api_csrf_headers(client)
+
+    for bad_id in ["short", "ABCDEF12345!", "", "   ", "AB CD EF1234"]:
+        response = client.post(
+            "/api/v1/scholars",
+            json={"scholar_id": bad_id},
+            headers=headers,
+        )
+        assert response.status_code == 400, f"Expected 400 for scholar_id={bad_id!r}"
+        assert response.json()["error"]["code"] == "invalid_scholar"
+
+
 @pytest.mark.integration
 @pytest.mark.db
 @pytest.mark.asyncio
diff --git a/tests/integration/test_api_scholars_bulk.py b/tests/integration/test_api_scholars_bulk.py
index a481c32..28be206 100644
--- a/tests/integration/test_api_scholars_bulk.py
+++ b/tests/integration/test_api_scholars_bulk.py
@@ -138,3 +138,33 @@ async def test_export_with_ids_filter(db_session: AsyncSession) -> None:
     resp_all = client.get("/api/v1/scholars/export")
     assert resp_all.status_code == 200
     assert len(resp_all.json()["data"]["scholars"]) == 2
+
+
+@pytest.mark.integration
+@pytest.mark.db
+@pytest.mark.asyncio
+async def test_bulk_delete_rejects_without_csrf(db_session: AsyncSession) -> None:
+    await insert_user(db_session, email="csrf-bulk-del@example.com", password="pw123456")
+    client = TestClient(app)
+    login_user(client, email="csrf-bulk-del@example.com", password="pw123456")
+    response = client.post(
+        "/api/v1/scholars/bulk-delete",
+        json={"scholar_profile_ids": [1]},
+    )
+    assert response.status_code == 403
+    assert response.json()["error"]["code"] == "csrf_invalid"
+
+
+@pytest.mark.integration
+@pytest.mark.db
+@pytest.mark.asyncio
+async def test_bulk_toggle_rejects_without_csrf(db_session: AsyncSession) -> None:
+    await insert_user(db_session, email="csrf-bulk-tog@example.com", password="pw123456")
+    client = TestClient(app)
+    login_user(client, email="csrf-bulk-tog@example.com", password="pw123456")
+    response = client.post(
+        "/api/v1/scholars/bulk-toggle",
+        json={"scholar_profile_ids": [1], "is_enabled": False},
+    )
+    assert response.status_code == 403
+    assert response.json()["error"]["code"] == "csrf_invalid"
diff --git a/tests/unit/test_scholar_validators.py b/tests/unit/test_scholar_validators.py
index 460b315..185d805 100644
--- a/tests/unit/test_scholar_validators.py
+++ b/tests/unit/test_scholar_validators.py
@@ -42,6 +42,34 @@ class TestValidateScholarId:
         with pytest.raises(ScholarServiceError, match="12"):
             validate_scholar_id("ABCDEF12345!")
 
+    def test_rejects_empty_string(self) -> None:
+        with pytest.raises(ScholarServiceError, match="12"):
+            validate_scholar_id("")
+
+    def test_rejects_whitespace_only(self) -> None:
+        with pytest.raises(ScholarServiceError, match="12"):
+            validate_scholar_id("   ")
+
+    def test_rejects_embedded_spaces(self) -> None:
+        with pytest.raises(ScholarServiceError, match="12"):
+            validate_scholar_id("ABCDEF 12345")
+
+    def test_rejects_tab_characters(self) -> None:
+        with pytest.raises(ScholarServiceError, match="12"):
+            validate_scholar_id("ABCDEF\t12345")
+
+    def test_rejects_url_as_id(self) -> None:
+        with pytest.raises(ScholarServiceError, match="12"):
+            validate_scholar_id("https://scholar.google.com/citations?user=ABCDEF123456")
+
+    def test_rejects_newline_in_id(self) -> None:
+        with pytest.raises(ScholarServiceError, match="12"):
+            validate_scholar_id("ABCDEF\n12345")
+
+    def test_rejects_unicode_characters(self) -> None:
+        with pytest.raises(ScholarServiceError, match="12"):
+            validate_scholar_id("ABCDEF12345\u00e9")
+
 
 class TestNormalizeDisplayName:
     def test_returns_stripped_name(self) -> None: