feat(forms): merge notes tab into main info for activity and deal forms; show activity hashtags

- Activity form: notes/tags card inline, live hashtag preview, focus notes when required
- Hashtags shown in activity detail (clickable search) and list rows; search accepts #tag
- Deal form: remove mobile tabs

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/web/src/views/ActivityDetailView.vue

@@ -316,6 +316,16 @@ onMounted(() => {
               <UiIcon name="building" :size="14" />
               {{ subtitle }}
             </p>
+            <div v-if="activity.tags?.length" class="tags">
+              <RouterLink
+                v-for="t in activity.tags"
+                :key="t"
+                class="tag"
+                :to="{ name: 'activities', query: { q: t, filter: 'all' } }"
+              >
+                #{{ t }}
+              </RouterLink>
+            </div>
           </div>
           <span class="type-ico" :style="typeColorStyle(typeView!.color)">
             <UiIcon :name="typeView!.icon" :size="22" />
@@ -612,6 +622,23 @@ h1 {
   flex-shrink: 0;
 }
 
+.tags {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 0.3rem;
+  margin-top: 0.5rem;
+}
+
+.tag {
+  background: #f0fdfa;
+  color: #0f766e;
+  border-radius: 999px;
+  padding: 0.15rem 0.55rem;
+  font-size: 0.76rem;
+  font-weight: 600;
+  text-decoration: none;
+}
+
 .type-ico.sm {
   width: 28px;
   height: 28px;