DRY refactoring pass: shared mixins, route helpers, composables, CSS

Backend:
- models/base.py: TimestampMixin + CreatedAtMixin; applied to all 10+ models
- routes/utils.py: not_found() + parse_iso_date() helpers; used across all route files
- routes/milestones.py: _milestone_dict() helper replaces 5 repeated to_dict + progress blocks

Frontend:
- 5 new composables: useAutoSave, useEditorGuards, useTagSuggestions,
  useFloatingAssist, useListKeyboardNavigation
- ConfirmDialog.vue: reusable confirm modal replacing inline <teleport> blocks
- editor-shared.css: sidebar CSS consolidated from both editor views
- viewer-shared.css: context-bar/breadcrumb CSS consolidated from both viewer views
- NoteEditorView + TaskEditorView: ~120 lines each replaced with composable calls;
  duplicate scoped sidebar CSS removed
- NotesListView + TasksListView: inline keyboard-nav replaced with composable
- NoteViewerView + TaskViewerView: duplicate context-bar CSS removed

No behaviour changes. Net: -634 lines, +237 lines across 31 files.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/assets/editor-shared.css

@@ -532,6 +532,70 @@
   pointer-events: auto;
 }
 
+/* ── Sidebar shared styles ── */
+.sidebar-toggle {
+  display: none;
+  width: 100%;
+  padding: 0.6rem 1rem;
+  background: var(--color-bg-secondary);
+  border: none;
+  border-bottom: 1px solid var(--color-border);
+  font-size: 0.85rem;
+  font-weight: 600;
+  color: var(--color-text-secondary);
+  cursor: pointer;
+  text-align: left;
+  font-family: inherit;
+}
+.sidebar-content {
+  padding: 0.75rem;
+  display: flex;
+  flex-direction: column;
+  gap: 0.65rem;
+}
+.sb-field {
+  display: flex;
+  flex-direction: column;
+  gap: 0.25rem;
+}
+.sb-label {
+  font-size: 0.78rem;
+  font-weight: 600;
+  color: var(--color-text-secondary);
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+}
+.sb-select,
+.sb-input {
+  width: 100%;
+  padding: 0.35rem 0.5rem;
+  border: 1px solid var(--color-input-border);
+  border-radius: var(--radius-sm);
+  background: var(--color-bg-card);
+  color: var(--color-text);
+  font-size: 0.875rem;
+  font-family: inherit;
+  box-sizing: border-box;
+}
+.sb-select:focus,
+.sb-input:focus {
+  outline: none;
+  border-color: var(--color-primary);
+}
+.sb-divider {
+  height: 1px;
+  background: var(--color-border);
+  margin: 0.15rem 0;
+}
+@media (max-width: 720px) {
+  .sidebar-toggle { display: block; }
+  .sidebar-content {
+    display: none;
+    padding: 0.75rem 1rem;
+  }
+  .sidebar-content.sidebar-open { display: flex; }
+}
+
 /* ── Mobile ── */
 @media (max-width: 768px) {
   .editor-body {

frontend/src/assets/viewer-shared.css

@@ -0,0 +1,41 @@
+/* ── Context breadcrumb (shared by NoteViewerView and TaskViewerView) ── */
+.context-bar {
+  display: flex;
+  align-items: center;
+  gap: 0.4rem;
+  flex-wrap: wrap;
+  margin-bottom: 0.6rem;
+}
+.ctx-crumb {
+  display: inline-flex;
+  align-items: center;
+  font-size: 0.8rem;
+  padding: 0.15rem 0.55rem;
+  border-radius: 999px;
+  white-space: nowrap;
+}
+.ctx-crumb-parent {
+  color: var(--color-text-muted);
+  background: var(--color-bg-secondary);
+  border: 1px solid var(--color-border);
+  text-decoration: none;
+}
+.ctx-crumb-parent:hover {
+  color: var(--color-primary);
+  border-color: var(--color-primary);
+}
+.ctx-crumb-project {
+  color: var(--color-primary);
+  background: color-mix(in srgb, var(--color-primary) 10%, transparent);
+  border: 1px solid color-mix(in srgb, var(--color-primary) 30%, transparent);
+  text-decoration: none;
+  font-weight: 500;
+}
+.ctx-crumb-project:hover {
+  background: color-mix(in srgb, var(--color-primary) 18%, transparent);
+}
+.ctx-crumb-milestone {
+  color: var(--color-text-secondary);
+  background: var(--color-bg-secondary);
+  border: 1px solid var(--color-border);
+}

frontend/src/components/ConfirmDialog.vue

@@ -0,0 +1,37 @@
+<script setup lang="ts">
+withDefaults(
+  defineProps<{
+    title: string;
+    message: string;
+    confirmLabel?: string;
+    danger?: boolean;
+  }>(),
+  {
+    confirmLabel: "Delete",
+    danger: true,
+  }
+);
+
+const emit = defineEmits<{
+  confirm: [];
+  cancel: [];
+}>();
+</script>
+
+<template>
+  <teleport to="body">
+    <div class="modal-overlay" @click="emit('cancel')">
+      <div class="modal-card" @click.stop>
+        <h3 class="modal-title">{{ title }}</h3>
+        <p class="modal-message">{{ message }}</p>
+        <div class="modal-actions">
+          <button class="modal-btn" @click="emit('cancel')">Cancel</button>
+          <button
+            :class="['modal-btn', { 'modal-btn-danger': danger }]"
+            @click="emit('confirm')"
+          >{{ confirmLabel }}</button>
+        </div>
+      </div>
+    </div>
+  </teleport>
+</template>

frontend/src/composables/useAutoSave.ts

@@ -0,0 +1,22 @@
+import { onMounted, onUnmounted } from "vue";
+import type { Ref } from "vue";
+
+export function useAutoSave(
+  dirty: Ref<boolean>,
+  saving: Ref<boolean>,
+  saveFn: () => Promise<void>,
+  intervalMs = 5 * 60 * 1000,
+): void {
+  let timer: ReturnType<typeof setInterval> | null = null;
+
+  onMounted(() => {
+    timer = setInterval(async () => {
+      if (!dirty.value || saving.value) return;
+      await saveFn();
+    }, intervalMs);
+  });
+
+  onUnmounted(() => {
+    if (timer !== null) clearInterval(timer);
+  });
+}

frontend/src/composables/useEditorGuards.ts

@@ -0,0 +1,33 @@
+import { onMounted, onUnmounted } from "vue";
+import { onBeforeRouteLeave } from "vue-router";
+import type { Ref } from "vue";
+
+export function useEditorGuards(
+  dirty: Ref<boolean>,
+  saveFn: () => void | Promise<void>,
+): void {
+  function onKeydown(e: KeyboardEvent) {
+    if ((e.ctrlKey || e.metaKey) && e.key === "s") {
+      e.preventDefault();
+      saveFn();
+    }
+  }
+
+  function onBeforeUnload(e: BeforeUnloadEvent) {
+    if (dirty.value) e.preventDefault();
+  }
+
+  onMounted(() => {
+    document.addEventListener("keydown", onKeydown);
+    window.addEventListener("beforeunload", onBeforeUnload);
+  });
+
+  onUnmounted(() => {
+    document.removeEventListener("keydown", onKeydown);
+    window.removeEventListener("beforeunload", onBeforeUnload);
+  });
+
+  onBeforeRouteLeave(() => {
+    if (dirty.value) return confirm("You have unsaved changes. Leave anyway?");
+  });
+}

frontend/src/composables/useFloatingAssist.ts

@@ -0,0 +1,34 @@
+import { ref } from "vue";
+
+type Selection = { text: string; start: number; end: number };
+
+export function useFloatingAssist(onRequest: (sel: Selection) => void) {
+  const floatingAssist = ref({ show: false, top: 0, left: 0 });
+  const pendingSelection = ref<Selection | null>(null);
+
+  function onSelectionChange(payload: Selection) {
+    if (payload.text.trim().length > 0) {
+      const sel = window.getSelection();
+      if (sel && sel.rangeCount > 0) {
+        const rect = sel.getRangeAt(0).getBoundingClientRect();
+        floatingAssist.value = {
+          show: true,
+          top: rect.top - 44,
+          left: rect.left + rect.width / 2,
+        };
+        pendingSelection.value = payload;
+      }
+    } else {
+      floatingAssist.value.show = false;
+      pendingSelection.value = null;
+    }
+  }
+
+  function handleInlineAssist() {
+    if (!pendingSelection.value) return;
+    floatingAssist.value.show = false;
+    onRequest(pendingSelection.value);
+  }
+
+  return { floatingAssist, onSelectionChange, handleInlineAssist };
+}

frontend/src/composables/useListKeyboardNavigation.ts

@@ -0,0 +1,39 @@
+import { ref, onMounted, onUnmounted } from "vue";
+import type { Ref } from "vue";
+
+export function useListKeyboardNavigation<T extends { id: number }>(
+  items: Ref<T[]>,
+  navigateTo: (item: T) => void,
+  rowSelector = ".kb-active-item",
+  enabled?: Ref<boolean>,
+) {
+  const activeIndex = ref(-1);
+
+  function onKeydown(e: KeyboardEvent) {
+    if (enabled && !enabled.value) return;
+    const el = document.activeElement;
+    const tag = el ? (el as HTMLElement).tagName : "";
+    const isInput =
+      tag === "INPUT" || tag === "TEXTAREA" || (el as HTMLElement)?.isContentEditable;
+    if (isInput || e.ctrlKey || e.metaKey || e.altKey) return;
+
+    const count = items.value.length;
+    if (e.key === "j") {
+      e.preventDefault();
+      activeIndex.value = Math.min(activeIndex.value + 1, count - 1);
+      document.querySelector(rowSelector)?.scrollIntoView({ block: "nearest" });
+    } else if (e.key === "k") {
+      e.preventDefault();
+      activeIndex.value = Math.max(activeIndex.value - 1, 0);
+      document.querySelector(rowSelector)?.scrollIntoView({ block: "nearest" });
+    } else if (e.key === "Enter" && activeIndex.value >= 0) {
+      const item = items.value[activeIndex.value];
+      if (item) navigateTo(item);
+    }
+  }
+
+  onMounted(() => document.addEventListener("keydown", onKeydown));
+  onUnmounted(() => document.removeEventListener("keydown", onKeydown));
+
+  return { activeIndex };
+}

frontend/src/composables/useTagSuggestions.ts

@@ -0,0 +1,58 @@
+import { ref } from "vue";
+import type { Ref } from "vue";
+import { apiPost } from "@/api/client";
+import { useToastStore } from "@/stores/toast";
+
+export function useTagSuggestions(
+  title: Ref<string>,
+  body: Ref<string>,
+  tags: Ref<string[]>,
+  markDirty: () => void,
+) {
+  const suggestedTags = ref<string[]>([]);
+  const appliedTags = ref<Set<string>>(new Set());
+  const suggestingTags = ref(false);
+
+  async function fetchTagSuggestions() {
+    if (suggestingTags.value) return;
+    suggestingTags.value = true;
+    suggestedTags.value = [];
+    appliedTags.value = new Set();
+    const toast = useToastStore();
+    try {
+      const res = await apiPost<{ suggested_tags: string[] }>("/api/notes/suggest-tags", {
+        title: title.value,
+        body: body.value,
+        current_tags: tags.value,
+      });
+      suggestedTags.value = res.suggested_tags;
+    } catch {
+      toast.show("Failed to get tag suggestions", "error");
+    } finally {
+      suggestingTags.value = false;
+    }
+  }
+
+  function applyTagSuggestion(tag: string) {
+    if (appliedTags.value.has(tag)) return;
+    if (!tags.value.includes(tag)) {
+      tags.value = [...tags.value, tag];
+    }
+    appliedTags.value.add(tag);
+    markDirty();
+  }
+
+  function dismissTagSuggestions() {
+    suggestedTags.value = [];
+    appliedTags.value = new Set();
+  }
+
+  return {
+    suggestedTags,
+    appliedTags,
+    suggestingTags,
+    fetchTagSuggestions,
+    applyTagSuggestion,
+    dismissTagSuggestions,
+  };
+}

frontend/src/views/NoteEditorView.vue

@@ -1,11 +1,15 @@
 <script setup lang="ts">
 import { ref, onMounted, onUnmounted, computed, nextTick, watch } from "vue";
-import { useRoute, useRouter, onBeforeRouteLeave } from "vue-router";
+import { useRoute, useRouter } from "vue-router";
 import { useNotesStore } from "@/stores/notes";
 import { useToastStore } from "@/stores/toast";
 import { renderMarkdown } from "@/utils/markdown";
 import { useAssist, type NoteDraft } from "@/composables/useAssist";
-import { apiPost, apiGet } from "@/api/client";
+import { useAutoSave } from "@/composables/useAutoSave";
+import { useEditorGuards } from "@/composables/useEditorGuards";
+import { useTagSuggestions } from "@/composables/useTagSuggestions";
+import { useFloatingAssist } from "@/composables/useFloatingAssist";
+import { apiGet, apiPost } from "@/api/client";
 import type { Editor } from "@tiptap/vue-3";
 import MarkdownToolbar from "@/components/MarkdownToolbar.vue";
 import TiptapEditor from "@/components/TiptapEditor.vue";
@@ -14,6 +18,7 @@ import ProjectSelector from "@/components/ProjectSelector.vue";
 import MilestoneSelector from "@/components/MilestoneSelector.vue";
 import DiffView from "@/components/DiffView.vue";
 import HistoryPanel from "@/components/HistoryPanel.vue";
+import ConfirmDialog from "@/components/ConfirmDialog.vue";
 
 const route = useRoute();
 const router = useRouter();
@@ -84,31 +89,14 @@ const scopeSelectValue = computed({
 });
 
 // Floating inline assist button
-const floatingAssist = ref({ show: false, top: 0, left: 0 });
-const pendingSelection = ref<{ start: number; end: number } | null>(null);
 const instructionRef = ref<HTMLTextAreaElement | null>(null);
-
-function onSelectionChange(payload: { text: string; start: number; end: number }) {
-  if (payload.text.trim().length > 0) {
-    const sel = window.getSelection();
-    if (sel && sel.rangeCount > 0) {
-      const rect = sel.getRangeAt(0).getBoundingClientRect();
-      floatingAssist.value = { show: true, top: rect.top - 44, left: rect.left + rect.width / 2 };
-      pendingSelection.value = { start: payload.start, end: payload.end };
-    }
-  } else {
-    floatingAssist.value.show = false;
-    pendingSelection.value = null;
+const { floatingAssist, onSelectionChange, handleInlineAssist } = useFloatingAssist(
+  ({ start, end }) => {
+    assist.scopeMode.value = 'section';
+    assist.selectTextRange(start, end);
+    nextTick(() => instructionRef.value?.focus());
   }
-}
-
-function handleInlineAssist() {
-  if (!pendingSelection.value) return;
-  assist.scopeMode.value = 'section';
-  assist.selectTextRange(pendingSelection.value.start, pendingSelection.value.end);
-  floatingAssist.value.show = false;
-  nextTick(() => instructionRef.value?.focus());
-}
+);
 
 function handleAssistAccept() {
   const newBody = assist.accept();
@@ -118,42 +106,8 @@ function handleAssistAccept() {
 }
 
 // Tag suggestions
-const suggestedTags = ref<string[]>([]);
-const appliedTags = ref<Set<string>>(new Set());
-const suggestingTags = ref(false);
-
-async function fetchTagSuggestions() {
-  if (suggestingTags.value) return;
-  suggestingTags.value = true;
-  suggestedTags.value = [];
-  appliedTags.value = new Set();
-  try {
-    const res = await apiPost<{ suggested_tags: string[] }>("/api/notes/suggest-tags", {
-      title: title.value,
-      body: body.value,
-      current_tags: tags.value,
-    });
-    suggestedTags.value = res.suggested_tags;
-  } catch {
-    toast.show("Failed to get tag suggestions", "error");
-  } finally {
-    suggestingTags.value = false;
-  }
-}
-
-function applyTagSuggestion(tag: string) {
-  if (appliedTags.value.has(tag)) return;
-  if (!tags.value.includes(tag)) {
-    tags.value = [...tags.value, tag];
-  }
-  appliedTags.value.add(tag);
-  markDirty();
-}
-
-function dismissTagSuggestions() {
-  suggestedTags.value = [];
-  appliedTags.value = new Set();
-}
+const { suggestedTags, appliedTags, suggestingTags, fetchTagSuggestions, applyTagSuggestion, dismissTagSuggestions } =
+  useTagSuggestions(title, body, tags, markDirty);
 
 // ── Link Suggestions ────────────────────────────────────────────────────────
 
@@ -331,10 +285,8 @@ async function confirmDelete() {
 }
 
 // Auto-save every 5 minutes
-let autoSaveTimer: ReturnType<typeof setInterval> | null = null;
-
-async function autoSave() {
-  if (!isEditing.value || !dirty.value || saving.value) return;
+async function doAutoSave() {
+  if (!isEditing.value || saving.value) return;
   saving.value = true;
   try {
     await store.updateNote(noteId.value!, {
@@ -354,29 +306,8 @@ async function autoSave() {
     saving.value = false;
   }
 }
-
-onMounted(() => { autoSaveTimer = setInterval(autoSave, 5 * 60 * 1000); });
-onUnmounted(() => { if (autoSaveTimer !== null) clearInterval(autoSaveTimer); });
-
-function onKeydown(e: KeyboardEvent) {
-  if ((e.ctrlKey || e.metaKey) && e.key === "s") {
-    e.preventDefault();
-    save();
-  }
-}
-
-onMounted(() => document.addEventListener("keydown", onKeydown));
-onUnmounted(() => document.removeEventListener("keydown", onKeydown));
-
-onBeforeRouteLeave(() => {
-  if (dirty.value) return confirm("You have unsaved changes. Leave anyway?");
-});
-
-function onBeforeUnload(e: BeforeUnloadEvent) {
-  if (dirty.value) e.preventDefault();
-}
-onMounted(() => window.addEventListener("beforeunload", onBeforeUnload));
-onUnmounted(() => window.removeEventListener("beforeunload", onBeforeUnload));
+useAutoSave(dirty, saving, doAutoSave);
+useEditorGuards(dirty, save);
 
 // Close any in-flight assist SSE stream when navigating away
 onUnmounted(() => assist.clearSelection());
@@ -595,18 +526,13 @@ onUnmounted(() => assist.clearSelection());
     />
 
     <!-- Delete confirmation -->
-    <teleport to="body">
-      <div v-if="showDeleteConfirm" class="modal-overlay" @click="showDeleteConfirm = false">
-        <div class="modal-card" @click.stop>
-          <h3 class="modal-title">Delete Note</h3>
-          <p class="modal-message">Are you sure you want to delete this note? This cannot be undone.</p>
-          <div class="modal-actions">
-            <button class="modal-btn" @click="showDeleteConfirm = false">Cancel</button>
-            <button class="modal-btn modal-btn-danger" @click="confirmDelete">Delete</button>
-          </div>
-        </div>
-      </div>
-    </teleport>
+    <ConfirmDialog
+      v-if="showDeleteConfirm"
+      title="Delete Note"
+      message="Are you sure you want to delete this note? This cannot be undone."
+      @confirm="confirmDelete"
+      @cancel="showDeleteConfirm = false"
+    />
   </main>
 </template>
 
@@ -675,61 +601,6 @@ onUnmounted(() => assist.clearSelection());
   flex-direction: column;
 }
 
-/* Mobile accordion toggle (hidden on desktop) */
-.sidebar-toggle {
-  display: none;
-  width: 100%;
-  padding: 0.6rem 1rem;
-  background: var(--color-bg-secondary);
-  border: none;
-  border-bottom: 1px solid var(--color-border);
-  font-size: 0.85rem;
-  font-weight: 600;
-  color: var(--color-text-secondary);
-  cursor: pointer;
-  text-align: left;
-  font-family: inherit;
-}
-
-.sidebar-content {
-  padding: 0.75rem;
-  display: flex;
-  flex-direction: column;
-  gap: 0.65rem;
-}
-
-/* Sidebar field layout */
-.sb-field {
-  display: flex;
-  flex-direction: column;
-  gap: 0.25rem;
-}
-.sb-label {
-  font-size: 0.78rem;
-  font-weight: 600;
-  color: var(--color-text-secondary);
-  text-transform: uppercase;
-  letter-spacing: 0.04em;
-}
-.sb-select {
-  width: 100%;
-  padding: 0.35rem 0.5rem;
-  border: 1px solid var(--color-input-border);
-  border-radius: var(--radius-sm);
-  background: var(--color-bg-card);
-  color: var(--color-text);
-  font-size: 0.875rem;
-  font-family: inherit;
-  box-sizing: border-box;
-}
-.sb-select:focus { outline: none; border-color: var(--color-primary); }
-
-.sb-divider {
-  height: 1px;
-  background: var(--color-border);
-  margin: 0.15rem 0;
-}
-
 /* Tag suggest row inside sidebar */
 .tag-suggest-row {
   display: flex;
@@ -841,11 +712,5 @@ onUnmounted(() => assist.clearSelection());
     border-top: 1px solid var(--color-border);
     overflow-y: visible;
   }
-  .sidebar-toggle { display: block; }
-  .sidebar-content {
-    display: none;
-    padding: 0.75rem 1rem;
-  }
-  .sidebar-content.sidebar-open { display: flex; }
 }
 </style>

frontend/src/views/NoteViewerView.vue

@@ -229,6 +229,7 @@ async function convertToTask() {
   </div>
 </template>
 
+<style src="@/assets/viewer-shared.css" />
 <style scoped>
 .viewer-layout {
   display: flex;
@@ -294,48 +295,6 @@ async function convertToTask() {
   cursor: default;
 }
 
-/* Context breadcrumb */
-.context-bar {
-  display: flex;
-  align-items: center;
-  gap: 0.4rem;
-  flex-wrap: wrap;
-  margin-bottom: 0.6rem;
-}
-.ctx-crumb {
-  display: inline-flex;
-  align-items: center;
-  font-size: 0.8rem;
-  padding: 0.15rem 0.55rem;
-  border-radius: 999px;
-  white-space: nowrap;
-}
-.ctx-crumb-parent {
-  color: var(--color-text-muted);
-  background: var(--color-bg-secondary);
-  border: 1px solid var(--color-border);
-  text-decoration: none;
-}
-.ctx-crumb-parent:hover {
-  color: var(--color-primary);
-  border-color: var(--color-primary);
-}
-.ctx-crumb-project {
-  color: var(--color-primary);
-  background: color-mix(in srgb, var(--color-primary) 10%, transparent);
-  border: 1px solid color-mix(in srgb, var(--color-primary) 30%, transparent);
-  text-decoration: none;
-  font-weight: 500;
-}
-.ctx-crumb-project:hover {
-  background: color-mix(in srgb, var(--color-primary) 18%, transparent);
-}
-.ctx-crumb-milestone {
-  color: var(--color-text-secondary);
-  background: var(--color-bg-secondary);
-  border: 1px solid var(--color-border);
-}
-
 .meta {
   font-size: 0.85rem;
   color: var(--color-text-muted);

frontend/src/views/NotesListView.vue

@@ -1,7 +1,8 @@
 <script setup lang="ts">
-import { ref, onMounted, onUnmounted, watch } from "vue";
+import { ref, computed, onMounted, onUnmounted, watch } from "vue";
 import { useRoute, useRouter } from "vue-router";
 import { useNotesStore } from "@/stores/notes";
+import { useListKeyboardNavigation } from "@/composables/useListKeyboardNavigation";
 import SearchBar from "@/components/SearchBar.vue";
 import NoteCard from "@/components/NoteCard.vue";
 import TagPill from "@/components/TagPill.vue";
@@ -14,36 +15,15 @@ const router = useRouter();
 const store = useNotesStore();
 
 const searchBarRef = ref<{ focus: () => void } | null>(null);
-const activeIndex = ref(-1);
 
 function onFocusSearch() {
   searchBarRef.value?.focus();
 }
 
-function onKeydown(e: KeyboardEvent) {
-  const el = document.activeElement;
-  const tag = el ? (el as HTMLElement).tagName : "";
-  const isInput = tag === "INPUT" || tag === "TEXTAREA" || (el as HTMLElement)?.isContentEditable;
-  if (isInput || e.ctrlKey || e.metaKey || e.altKey) return;
-  const count = store.notes.length;
-  if (e.key === "j") {
-    e.preventDefault();
-    activeIndex.value = Math.min(activeIndex.value + 1, count - 1);
-    scrollActiveIntoView();
-  } else if (e.key === "k") {
-    e.preventDefault();
-    activeIndex.value = Math.max(activeIndex.value - 1, 0);
-    scrollActiveIntoView();
-  } else if (e.key === "Enter" && activeIndex.value >= 0) {
-    const note = store.notes[activeIndex.value];
-    if (note) router.push(`/notes/${note.id}`);
-  }
-}
-
-function scrollActiveIntoView() {
-  const el = document.querySelector(".kb-active-item");
-  if (el) el.scrollIntoView({ block: "nearest" });
-}
+const { activeIndex } = useListKeyboardNavigation(
+  computed(() => store.notes),
+  (note) => router.push(`/notes/${note.id}`),
+);
 
 const viewMode = ref<ViewMode>(
   (localStorage.getItem("fabled-notes-view-mode") as ViewMode) ?? "grid"
@@ -63,12 +43,10 @@ onMounted(() => {
     store.refresh();
   }
   document.addEventListener("shortcut:focus-search", onFocusSearch);
-  document.addEventListener("keydown", onKeydown);
 });
 
 onUnmounted(() => {
   document.removeEventListener("shortcut:focus-search", onFocusSearch);
-  document.removeEventListener("keydown", onKeydown);
 });
 
 watch(

frontend/src/views/TaskEditorView.vue

@@ -1,11 +1,15 @@
 <script setup lang="ts">
-import { ref, onMounted, onUnmounted, computed, nextTick } from "vue";
-import { useRoute, useRouter, onBeforeRouteLeave } from "vue-router";
+import { ref, onMounted, computed, nextTick } from "vue";
+import { useRoute, useRouter } from "vue-router";
 import { useTasksStore } from "@/stores/tasks";
 import { useNotesStore } from "@/stores/notes";
 import { useToastStore } from "@/stores/toast";
 import { renderMarkdown } from "@/utils/markdown";
 import { useAssist } from "@/composables/useAssist";
+import { useAutoSave } from "@/composables/useAutoSave";
+import { useEditorGuards } from "@/composables/useEditorGuards";
+import { useTagSuggestions } from "@/composables/useTagSuggestions";
+import { useFloatingAssist } from "@/composables/useFloatingAssist";
 import { apiPost, apiGet, apiPatch } from "@/api/client";
 import type { TaskStatus, TaskPriority } from "@/types/task";
 import type { Editor } from "@tiptap/vue-3";
@@ -16,6 +20,7 @@ import ProjectSelector from "@/components/ProjectSelector.vue";
 import MilestoneSelector from "@/components/MilestoneSelector.vue";
 import TaskLogSection from "@/components/TaskLogSection.vue";
 import InlineAssistPanel from "@/components/InlineAssistPanel.vue";
+import ConfirmDialog from "@/components/ConfirmDialog.vue";
 
 const route = useRoute();
 const router = useRouter();
@@ -126,32 +131,15 @@ function toggleAssist() {
 }
 
 // Floating inline assist button
-const floatingAssist = ref({ show: false, top: 0, left: 0 });
-const pendingSelection = ref<{ start: number; end: number } | null>(null);
 const instructionRef = ref<HTMLTextAreaElement | null>(null);
-
-function onSelectionChange(payload: { text: string; start: number; end: number }) {
-  if (payload.text.trim().length > 0) {
-    const sel = window.getSelection();
-    if (sel && sel.rangeCount > 0) {
-      const rect = sel.getRangeAt(0).getBoundingClientRect();
-      floatingAssist.value = { show: true, top: rect.top - 44, left: rect.left + rect.width / 2 };
-      pendingSelection.value = { start: payload.start, end: payload.end };
-    }
-  } else {
-    floatingAssist.value.show = false;
-    pendingSelection.value = null;
+const { floatingAssist, onSelectionChange, handleInlineAssist } = useFloatingAssist(
+  ({ start, end }) => {
+    assist.selectTextRange(start, end);
+    assistOpen.value = true;
+    localStorage.setItem(ASSIST_KEY, 'true');
+    nextTick(() => instructionRef.value?.focus());
   }
-}
-
-function handleInlineAssist() {
-  if (!pendingSelection.value) return;
-  assist.selectTextRange(pendingSelection.value.start, pendingSelection.value.end);
-  assistOpen.value = true;
-  localStorage.setItem(ASSIST_KEY, 'true');
-  floatingAssist.value.show = false;
-  nextTick(() => instructionRef.value?.focus());
-}
+);
 
 function handleAssistAccept() {
   const newBody = assist.accept();
@@ -168,42 +156,8 @@ function truncateTarget(text: string, max = 60): string {
 }
 
 // Tag suggestions
-const suggestedTags = ref<string[]>([]);
-const appliedTags = ref<Set<string>>(new Set());
-const suggestingTags = ref(false);
-
-async function fetchTagSuggestions() {
-  if (suggestingTags.value) return;
-  suggestingTags.value = true;
-  suggestedTags.value = [];
-  appliedTags.value = new Set();
-  try {
-    const res = await apiPost<{ suggested_tags: string[] }>("/api/notes/suggest-tags", {
-      title: title.value,
-      body: body.value,
-      current_tags: tags.value,
-    });
-    suggestedTags.value = res.suggested_tags;
-  } catch {
-    toast.show("Failed to get tag suggestions", "error");
-  } finally {
-    suggestingTags.value = false;
-  }
-}
-
-function applyTagSuggestion(tag: string) {
-  if (appliedTags.value.has(tag)) return;
-  if (!tags.value.includes(tag)) {
-    tags.value = [...tags.value, tag];
-  }
-  appliedTags.value.add(tag);
-  markDirty();
-}
-
-function dismissTagSuggestions() {
-  suggestedTags.value = [];
-  appliedTags.value = new Set();
-}
+const { suggestedTags, appliedTags, suggestingTags, fetchTagSuggestions, applyTagSuggestion, dismissTagSuggestions } =
+  useTagSuggestions(title, body, tags, markDirty);
 
 let savedTitle = "";
 let savedBody = "";
@@ -383,10 +337,8 @@ async function confirmDelete() {
 }
 
 // Auto-save every 5 minutes when editing an existing task
-let autoSaveTimer: ReturnType<typeof setInterval> | null = null;
-
-async function autoSave() {
-  if (!isEditing.value || !dirty.value || saving.value) return;
+async function doAutoSave() {
+  if (!isEditing.value || saving.value) return;
   saving.value = true;
   try {
     await store.updateTask(taskId.value!, {
@@ -417,33 +369,8 @@ async function autoSave() {
     saving.value = false;
   }
 }
-
-onMounted(() => { autoSaveTimer = setInterval(autoSave, 5 * 60 * 1000); });
-onUnmounted(() => { if (autoSaveTimer !== null) clearInterval(autoSaveTimer); });
-
-function onKeydown(e: KeyboardEvent) {
-  if ((e.ctrlKey || e.metaKey) && e.key === "s") {
-    e.preventDefault();
-    save();
-  }
-}
-
-onMounted(() => document.addEventListener("keydown", onKeydown));
-onUnmounted(() => document.removeEventListener("keydown", onKeydown));
-
-onBeforeRouteLeave(() => {
-  if (dirty.value) {
-    return confirm("You have unsaved changes. Leave anyway?");
-  }
-});
-
-function onBeforeUnload(e: BeforeUnloadEvent) {
-  if (dirty.value) {
-    e.preventDefault();
-  }
-}
-onMounted(() => window.addEventListener("beforeunload", onBeforeUnload));
-onUnmounted(() => window.removeEventListener("beforeunload", onBeforeUnload));
+useAutoSave(dirty, saving, doAutoSave);
+useEditorGuards(dirty, save);
 </script>
 
 <template>
@@ -710,18 +637,13 @@ onUnmounted(() => window.removeEventListener("beforeunload", onBeforeUnload));
     </teleport>
 
     <!-- Delete confirmation -->
-    <teleport to="body">
-      <div v-if="showDeleteConfirm" class="modal-overlay" @click="showDeleteConfirm = false">
-        <div class="modal-card" @click.stop>
-          <h3 class="modal-title">Delete Task</h3>
-          <p class="modal-message">Are you sure you want to delete this task? This cannot be undone.</p>
-          <div class="modal-actions">
-            <button class="modal-btn" @click="showDeleteConfirm = false">Cancel</button>
-            <button class="modal-btn modal-btn-danger" @click="confirmDelete">Delete</button>
-          </div>
-        </div>
-      </div>
-    </teleport>
+    <ConfirmDialog
+      v-if="showDeleteConfirm"
+      title="Delete Task"
+      message="Are you sure you want to delete this task? This cannot be undone."
+      @confirm="confirmDelete"
+      @cancel="showDeleteConfirm = false"
+    />
   </main>
 </template>
 
@@ -777,66 +699,6 @@ onUnmounted(() => window.removeEventListener("beforeunload", onBeforeUnload));
   flex-direction: column;
 }
 
-/* Mobile accordion toggle (hidden on desktop) */
-.sidebar-toggle {
-  display: none;
-  width: 100%;
-  padding: 0.6rem 1rem;
-  background: var(--color-bg-secondary);
-  border: none;
-  border-bottom: 1px solid var(--color-border);
-  font-size: 0.85rem;
-  font-weight: 600;
-  color: var(--color-text-secondary);
-  cursor: pointer;
-  text-align: left;
-  font-family: inherit;
-}
-
-.sidebar-content {
-  padding: 0.75rem;
-  display: flex;
-  flex-direction: column;
-  gap: 0.65rem;
-}
-
-/* Sidebar field layout */
-.sb-field {
-  display: flex;
-  flex-direction: column;
-  gap: 0.25rem;
-}
-.sb-label {
-  font-size: 0.78rem;
-  font-weight: 600;
-  color: var(--color-text-secondary);
-  text-transform: uppercase;
-  letter-spacing: 0.04em;
-}
-.sb-select,
-.sb-input {
-  width: 100%;
-  padding: 0.35rem 0.5rem;
-  border: 1px solid var(--color-input-border);
-  border-radius: var(--radius-sm);
-  background: var(--color-bg-card);
-  color: var(--color-text);
-  font-size: 0.875rem;
-  font-family: inherit;
-  box-sizing: border-box;
-}
-.sb-select:focus,
-.sb-input:focus {
-  outline: none;
-  border-color: var(--color-primary);
-}
-
-.sb-divider {
-  height: 1px;
-  background: var(--color-border);
-  margin: 0.15rem 0;
-}
-
 /* Parent task search */
 .parent-search-wrapper { position: relative; }
 .parent-input-row { display: flex; align-items: center; gap: 0.25rem; }
@@ -985,11 +847,5 @@ onUnmounted(() => window.removeEventListener("beforeunload", onBeforeUnload));
     border-top: 1px solid var(--color-border);
     overflow-y: visible;
   }
-  .sidebar-toggle { display: block; }
-  .sidebar-content {
-    display: none;
-    padding: 0.75rem 1rem;
-  }
-  .sidebar-content.sidebar-open { display: flex; }
 }
 </style>

frontend/src/views/TaskViewerView.vue

@@ -315,6 +315,7 @@ const subTaskProgress = computed(() => {
   </div>
 </template>
 
+<style src="@/assets/viewer-shared.css" />
 <style scoped>
 .viewer-layout {
   display: flex;
@@ -380,48 +381,6 @@ const subTaskProgress = computed(() => {
   cursor: default;
 }
 
-/* Context breadcrumb */
-.context-bar {
-  display: flex;
-  align-items: center;
-  gap: 0.4rem;
-  flex-wrap: wrap;
-  margin-bottom: 0.6rem;
-}
-.ctx-crumb {
-  display: inline-flex;
-  align-items: center;
-  font-size: 0.8rem;
-  padding: 0.15rem 0.55rem;
-  border-radius: 999px;
-  white-space: nowrap;
-}
-.ctx-crumb-parent {
-  color: var(--color-text-muted);
-  background: var(--color-bg-secondary);
-  border: 1px solid var(--color-border);
-  text-decoration: none;
-}
-.ctx-crumb-parent:hover {
-  color: var(--color-primary);
-  border-color: var(--color-primary);
-}
-.ctx-crumb-project {
-  color: var(--color-primary);
-  background: color-mix(in srgb, var(--color-primary) 10%, transparent);
-  border: 1px solid color-mix(in srgb, var(--color-primary) 30%, transparent);
-  text-decoration: none;
-  font-weight: 500;
-}
-.ctx-crumb-project:hover {
-  background: color-mix(in srgb, var(--color-primary) 18%, transparent);
-}
-.ctx-crumb-milestone {
-  color: var(--color-text-secondary);
-  background: var(--color-bg-secondary);
-  border: 1px solid var(--color-border);
-}
-
 .meta {
   font-size: 0.85rem;
   color: var(--color-text-muted);

frontend/src/views/TasksListView.vue

@@ -4,6 +4,7 @@ import { useRoute, useRouter } from "vue-router";
 import { useTasksStore } from "@/stores/tasks";
 import type { Task, TaskStatus } from "@/types/task";
 import { apiGet } from "@/api/client";
+import { useListKeyboardNavigation } from "@/composables/useListKeyboardNavigation";
 import SearchBar from "@/components/SearchBar.vue";
 import TaskCard from "@/components/TaskCard.vue";
 import TagPill from "@/components/TagPill.vue";
@@ -16,33 +17,11 @@ const router = useRouter();
 const store = useTasksStore();
 
 const searchBarRef = ref<{ focus: () => void } | null>(null);
-const activeIndex = ref(-1);
 
 function onFocusSearch() {
   searchBarRef.value?.focus();
 }
 
-function onKeydown(e: KeyboardEvent) {
-  if (viewMode.value !== "flat") return;
-  const el = document.activeElement;
-  const tag = el ? (el as HTMLElement).tagName : "";
-  const isInput = tag === "INPUT" || tag === "TEXTAREA" || (el as HTMLElement)?.isContentEditable;
-  if (isInput || e.ctrlKey || e.metaKey || e.altKey) return;
-  const count = store.tasks.length;
-  if (e.key === "j") {
-    e.preventDefault();
-    activeIndex.value = Math.min(activeIndex.value + 1, count - 1);
-    document.querySelector(".kb-active-item")?.scrollIntoView({ block: "nearest" });
-  } else if (e.key === "k") {
-    e.preventDefault();
-    activeIndex.value = Math.max(activeIndex.value - 1, 0);
-    document.querySelector(".kb-active-item")?.scrollIntoView({ block: "nearest" });
-  } else if (e.key === "Enter" && activeIndex.value >= 0) {
-    const task = store.tasks[activeIndex.value];
-    if (task) router.push(`/tasks/${task.id}`);
-  }
-}
-
 const viewMode = ref<ViewMode>(
   (localStorage.getItem("fabled-tasks-view-mode") as ViewMode) ?? "flat"
 );
@@ -60,6 +39,14 @@ function setViewMode(mode: ViewMode) {
   store.refresh();
 }
 
+const isFlat = computed(() => viewMode.value === "flat");
+const { activeIndex } = useListKeyboardNavigation(
+  computed(() => store.tasks),
+  (task) => router.push(`/tasks/${task.id}`),
+  ".kb-active-item",
+  isFlat,
+);
+
 // Project map for group labels and task breadcrumbs
 const projectMap = ref<Map<number, string>>(new Map());
 
@@ -119,12 +106,10 @@ onMounted(async () => {
   }
   await Promise.all([store.refresh(), loadProjects()]);
   document.addEventListener("shortcut:focus-search", onFocusSearch);
-  document.addEventListener("keydown", onKeydown);
 });
 
 onUnmounted(() => {
   document.removeEventListener("shortcut:focus-search", onFocusSearch);
-  document.removeEventListener("keydown", onKeydown);
 });
 
 watch(