Enhance dashboard with 7-day lookahead, priority surfacing, and inline edit buttons

Dashboard improvements:
- Added "Due This Week" section (next 7 days) and "High Priority" section
  (amber accent, catches high-priority tasks not already shown by date)
- All task sections sort by priority desc then due date asc
- Cascading deduplication via shared seen-set across all 5 sections
- Combined due-today + due-this-week into single API call, split client-side
- Removed unused `tomorrow` variable (fixed vue-tsc build error)

Inline edit buttons:
- NoteCard and TaskCard show "Edit" button on hover (always visible on touch)
- Navigates directly to edit view via .prevent.stop on router-link cards
- Styled as subtle bordered button, highlights to primary on hover

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

frontend/src/components/NoteCard.vue

@@ -1,20 +1,29 @@
 <script setup lang="ts">
+import { useRouter } from "vue-router";
 import type { Note } from "@/types/note";
 import TagPill from "@/components/TagPill.vue";
 import { relativeTime } from "@/composables/useRelativeTime";
 import { renderPreview } from "@/utils/markdown";
 
-defineProps<{ note: Note }>();
+const props = defineProps<{ note: Note }>();
 const emit = defineEmits<{ "tag-click": [tag: string] }>();
+const router = useRouter();
 
 function onTagClick(tag: string) {
   emit("tag-click", tag);
 }
+
+function goEdit() {
+  router.push(`/notes/${props.note.id}/edit`);
+}
 </script>
 
 <template>
   <router-link :to="`/notes/${note.id}`" class="note-card">
-    <h3 class="note-title">{{ note.title || "Untitled" }}</h3>
+    <div class="note-top">
+      <h3 class="note-title">{{ note.title || "Untitled" }}</h3>
+      <button class="btn-edit" title="Edit" @click.prevent.stop="goEdit">Edit</button>
+    </div>
     <div v-if="note.body" class="note-preview prose" v-html="renderPreview(note.body)"></div>
     <div class="note-meta">
       <TagPill
@@ -42,9 +51,44 @@ function onTagClick(tag: string) {
 .note-card:hover {
   box-shadow: 0 2px 8px var(--color-shadow);
 }
+.note-top {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 0.5rem;
+  margin-bottom: 0.25rem;
+}
 .note-title {
-  margin: 0 0 0.25rem;
+  margin: 0;
   font-size: 1.1rem;
+  min-width: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+.btn-edit {
+  flex-shrink: 0;
+  padding: 0.2rem 0.5rem;
+  font-size: 0.75rem;
+  background: transparent;
+  color: var(--color-text-muted);
+  border: 1px solid var(--color-border);
+  border-radius: var(--radius-sm);
+  cursor: pointer;
+  opacity: 0;
+  transition: opacity 0.15s, color 0.15s, border-color 0.15s;
+}
+.note-card:hover .btn-edit {
+  opacity: 1;
+}
+.btn-edit:hover {
+  color: var(--color-primary);
+  border-color: var(--color-primary);
+}
+@media (hover: none) {
+  .btn-edit {
+    opacity: 1;
+  }
 }
 .note-preview {
   margin: 0 0 0.5rem;