feat(briefing): hard-cut tear-down

Backend:
- Delete briefing services (pipeline, scheduler, conversations, profile, tools)
- Delete routes/briefing.py + remove blueprint registration
- Move _get_temp_unit into services/weather.get_temp_unit (reads top-level temp_unit setting)
- Rename briefing_preferences.py → rss_filtering.py (functions are RSS-specific)
- Strip briefing scheduler hooks from app.py
- Strip briefing scheduler call from routes/settings.py
- Update test imports (test_rss_service, test_tz_helpers)

Frontend:
- Delete BriefingView, BriefingSetupWizard, BriefingToolStatusRow
- Strip /briefing route + nav links (AppHeader, KnowledgeView)
- Strip Settings → Briefing tab + state + functions + imports
- Strip briefing-intermediate handling from ChatMessage
- Hide /news route + nav links (NewsView depended on briefing endpoints; orphaned in tree)
- Drop unused useSettingsStore from AppHeader

The Android BriefingScreen lives in a separate repo and is not touched here.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

frontend/src/components/ChatMessage.vue

@@ -3,16 +3,8 @@ import { computed } from "vue";
 import { renderMarkdown } from "@/utils/markdown";
 import { useSettingsStore } from "@/stores/settings";
 import ToolCallCard from "@/components/ToolCallCard.vue";
-import BriefingToolStatusRow from "@/components/BriefingToolStatusRow.vue";
 import type { Message } from "@/types/chat";
 
-const SLOT_LABELS: Record<string, string> = {
-  compilation: "Full Briefing",
-  morning: "Morning Update",
-  midday: "Midday Update",
-  afternoon: "Afternoon Update",
-};
-
 const settingsStore = useSettingsStore();
 
 const props = defineProps<{
@@ -50,28 +42,7 @@ function formatMs(ms: number | null | undefined): string {
 }
 
 const metadata = computed(() => (props.message.metadata ?? {}) as Record<string, unknown>);
-
-const isBriefingIntermediate = computed(
-  () => props.message.role === "assistant" && metadata.value.briefing_intermediate === true,
-);
-
-const briefingSlot = computed(() => {
-  const slot = metadata.value.briefing_slot;
-  return typeof slot === "string" ? slot : null;
-});
-
-const slotLabel = computed(() => {
-  const slot = briefingSlot.value;
-  if (!slot) return null;
-  return SLOT_LABELS[slot] ?? slot;
-});
-
-const isSlotUpdate = computed(
-  () =>
-    !isBriefingIntermediate.value &&
-    briefingSlot.value != null &&
-    briefingSlot.value !== "compilation",
-);
+void metadata;
 
 const timingParts = computed((): string[] => {
   const t = props.message.timing;
@@ -89,16 +60,11 @@ const timingParts = computed((): string[] => {
 </script>
 
 <template>
-  <!-- Briefing intermediate: compact status row, no bubble -->
-  <div v-if="isBriefingIntermediate" class="chat-message role-assistant briefing-intermediate-row">
-    <BriefingToolStatusRow :tool-calls="message.tool_calls ?? []" />
-  </div>
-  <div v-else class="chat-message" :class="[`role-${message.role}`, { 'slot-update': isSlotUpdate }]">
+  <div class="chat-message" :class="`role-${message.role}`">
     <div class="message-group">
-      <div class="message-bubble" :class="{ 'bubble-slot': isSlotUpdate }">
+      <div class="message-bubble">
         <div class="message-header">
           <span class="role-label">{{ roleLabel }}</span>
-          <span v-if="slotLabel" class="slot-badge" :class="{ 'slot-badge-update': isSlotUpdate }">{{ slotLabel }}</span>
           <div class="message-actions" v-if="message.role === 'assistant' && !isStreaming">
             <button class="btn-save" @click="emit('saveAsNote', message.id)" title="Save as note">
               Save as Note
@@ -319,38 +285,4 @@ details[open] .thinking-summary::before {
   opacity: 0.5;
 }
 
-/* ── Briefing intermediate row (no bubble) ──────────────── */
-.briefing-intermediate-row {
-  margin-bottom: 0.5rem;
-}
-
-/* ── Slot badge (morning/midday/afternoon/full) ─────────── */
-.slot-badge {
-  font-size: 0.65rem;
-  font-weight: 700;
-  text-transform: uppercase;
-  letter-spacing: 0.05em;
-  padding: 0.1rem 0.45rem;
-  border-radius: 999px;
-  background: color-mix(in srgb, var(--color-primary) 14%, transparent);
-  color: var(--color-primary);
-  border: 1px solid color-mix(in srgb, var(--color-primary) 30%, transparent);
-  margin-left: 0.5rem;
-}
-.slot-badge-update {
-  background: color-mix(in srgb, var(--color-text-muted) 12%, transparent);
-  color: var(--color-text-muted);
-  border-color: var(--color-border);
-}
-
-/* ── Slot update bubbles: softer treatment than compilation ── */
-.slot-update .message-bubble.bubble-slot {
-  background: transparent;
-  border-left: 2px solid var(--color-border);
-  box-shadow: none;
-}
-.slot-update .message-bubble.bubble-slot .message-content {
-  font-size: 0.88rem;
-  color: var(--color-text-secondary);
-}
 </style>