fix(web): error handling in LibraryView, taskId watch in IngestProgress, type fixes

web/src/api.ts

@@ -36,6 +36,11 @@ export interface TaskStatus {
     error?: string
 }
 
+export interface ChatMessage {
+    role: string
+    content: string
+}
+
 export const api = {
     async getLibrary(): Promise<Document[]> {
         const r = await fetch(`${BASE}/api/library`)
@@ -72,7 +77,7 @@ export const api = {
     },
     async chat(
         message: string,
-        history: { role: string; content: string }[],
+        history: ChatMessage[],
         docIds?: string[],
         topK = 5,
     ): Promise<ChatResponse> {

web/src/components/DocumentCard.vue

@@ -2,7 +2,7 @@
   <div class="doc-card" :class="`status-${doc.status}`">
     <div class="doc-status-badge">{{ doc.status }}</div>
     <div class="doc-title">{{ doc.title }}</div>
-    <div class="doc-meta" v-if="doc.page_count">{{ doc.page_count }} pages</div>
+    <div class="doc-meta" v-if="doc.page_count != null">{{ doc.page_count }} pages</div>
     <div class="doc-meta path">{{ shortPath }}</div>
 
     <IngestProgress

web/src/components/IngestProgress.vue

@@ -12,7 +12,7 @@
 </template>
 
 <script setup lang="ts">
-import { computed, onMounted, onUnmounted, ref } from "vue"
+import { computed, onMounted, onUnmounted, ref, watch } from "vue"
 import { api, type TaskStatus } from "@/api"
 
 const props = defineProps<{ taskId: string | null }>()
@@ -24,13 +24,13 @@ let timer: ReturnType<typeof setInterval> | null = null
 const visible = computed(() => props.taskId !== null && status.value?.status !== "complete")
 
 const statusLabel = computed(() => {
-    if (!status.value) return "Queued..."
+    if (!status.value) return "Queued…"
     const map: Record<string, string> = {
-        running: "Indexing...",
+        running: "Indexing…",
         complete: "Done",
         error: "Error",
     }
-    return map[status.value.status] ?? "Processing..."
+    return map[status.value.status] ?? "Processing…"
 })
 
 const barWidth = computed(() => {
@@ -55,12 +55,21 @@ function stopPoll() {
     if (timer) { clearInterval(timer); timer = null }
 }
 
-onMounted(() => {
+function startPoll() {
+    stopPoll()
+    status.value = null
     if (props.taskId) {
         poll()
         timer = setInterval(poll, 2000)
     }
+}
+
+watch(() => props.taskId, (newId) => {
+    if (newId) startPoll()
+    else stopPoll()
 })
+
+onMounted(startPoll)
 onUnmounted(stopPoll)
 </script>
 

web/src/views/LibraryView.vue

@@ -7,6 +7,8 @@
       </button>
     </header>
 
+    <p class="error-msg" v-if="error">{{ error }}</p>
+
     <p class="empty-state" v-if="!loading && docs.length === 0">
       No books indexed yet. Click "Scan for PDFs" to discover PDFs in your books directory.<br>
       Make sure your PDF directory is mounted at <code>/books</code> inside the container.
@@ -37,32 +39,53 @@ import DocumentCard from "@/components/DocumentCard.vue"
 const docs = ref<Document[]>([])
 const loading = ref(true)
 const scanning = ref(false)
+const error = ref<string | null>(null)
 const scanResult = ref<{ discovered: number; queued: number } | null>(null)
 
 async function load() {
     loading.value = true
-    docs.value = await api.getLibrary().finally(() => (loading.value = false))
+    error.value = null
+    try {
+        docs.value = await api.getLibrary()
+    } catch (e) {
+        error.value = e instanceof Error ? e.message : "Failed to load library"
+    } finally {
+        loading.value = false
+    }
 }
 
 async function scan() {
     scanning.value = true
+    error.value = null
     try {
         scanResult.value = await api.scanLibrary()
         await load()
+    } catch (e) {
+        error.value = e instanceof Error ? e.message : "Scan failed"
     } finally {
         scanning.value = false
     }
 }
 
 async function reingest(id: string) {
-    await api.reingestDocument(id)
-    await load()
+    error.value = null
+    try {
+        await api.reingestDocument(id)
+        await load()
+    } catch (e) {
+        error.value = e instanceof Error ? e.message : "Re-index failed"
+    }
 }
 
 async function remove(id: string) {
     if (!confirm("Remove this book from the library? The PDF file is not deleted.")) return
-    await api.deleteDocument(id)
-    await load()
+    error.value = null
+    try {
+        await api.deleteDocument(id)
+        await load()
+    } catch (e) {
+        error.value = e instanceof Error ? e.message : "Remove failed"
+    }
 }
 
 onMounted(load)
@@ -81,4 +104,5 @@ h1 { font-size: 1.5rem; }
 .empty-state { color: var(--color-text-muted); line-height: 1.8; }
 .empty-state code { font-family: var(--font-mono); background: var(--color-surface-alt); padding: 2px 6px; border-radius: 3px; }
 .scan-result { margin-top: 1rem; color: var(--color-text-muted); font-size: 0.9rem; }
+.error-msg { color: var(--color-error); margin-bottom: 1rem; font-size: 0.9rem; }
 </style>