feat: add delivery mode indicators and tooltips to location column

src/web/routes.rs

@@ -500,7 +500,11 @@ async fn search_courses(
     let (courses, total_count) = crate::data::courses::search_courses(
         &state.db_pool,
         &params.term,
-        if params.subject.is_empty() { None } else { Some(&params.subject) },
+        if params.subject.is_empty() {
+            None
+        } else {
+            Some(&params.subject)
+        },
         params.q.as_deref(),
         params.course_number_low,
         params.course_number_high,

web/src/lib/components/CourseTable.svelte

@@ -2,13 +2,16 @@
 import type { CourseResponse } from "$lib/api";
 import {
   abbreviateInstructor,
+  concernAccentColor,
+  formatLocationDisplay,
+  formatLocationTooltip,
   formatMeetingDays,
+  formatMeetingTimesTooltip,
   formatTimeRange,
-  formatLocation,
+  getDeliveryConcern,
   getPrimaryInstructor,
   isMeetingTimeTBA,
   isTimeTBA,
-  formatMeetingTimesTooltip,
 } from "$lib/course";
 import CourseDetail from "./CourseDetail.svelte";
 import { fade, fly, slide } from "svelte/transition";
@@ -208,7 +211,7 @@ const columns: ColumnDef<CourseResponse, unknown>[] = [
   },
   {
     id: "location",
-    accessorFn: (row) => formatLocation(row) ?? "",
+    accessorFn: (row) => formatLocationDisplay(row) ?? "",
     header: "Location",
     enableSorting: false,
   },
@@ -668,19 +671,31 @@ const table = createSvelteTable({
                                             </SimpleTooltip>
                                         </td>
                                     {:else if colId === "location"}
+                                        {@const concern = getDeliveryConcern(course)}
+                                        {@const accentColor = concernAccentColor(concern)}
+                                        {@const locTooltip = formatLocationTooltip(course)}
+                                        {@const locDisplay = formatLocationDisplay(course)}
                                         <td class="py-2 px-2 whitespace-nowrap">
-                                            {#if formatLocation(course)}
-                                                <span
-                                                    class="text-muted-foreground"
-                                                    >{formatLocation(
-                                                        course,
-                                                    )}</span
+                                            {#if locTooltip}
+                                                <SimpleTooltip
+                                                    text={locTooltip}
+                                                    delay={200}
+                                                    passthrough
                                                 >
+                                                    <span
+                                                        class="text-muted-foreground"
+                                                        class:pl-2={accentColor !== null}
+                                                        style:border-left={accentColor ? `2px solid ${accentColor}` : undefined}
+                                                    >
+                                                        {locDisplay ?? "—"}
+                                                    </span>
+                                                </SimpleTooltip>
+                                            {:else if locDisplay}
+                                                <span class="text-muted-foreground">
+                                                    {locDisplay}
+                                                </span>
                                             {:else}
-                                                <span
-                                                    class="text-xs text-muted-foreground/50"
-                                                    >—</span
-                                                >
+                                                <span class="text-xs text-muted-foreground/50">—</span>
                                             {/if}
                                         </td>
                                     {:else if colId === "seats"}

web/src/lib/components/TermCombobox.svelte

@@ -60,7 +60,7 @@ $effect(() => {
 >
   <div
     class="relative h-9 rounded-md border border-border bg-card
-           flex items-center w-56 cursor-pointer
+           flex items-center w-40 cursor-pointer
            has-[:focus-visible]:ring-2 has-[:focus-visible]:ring-ring has-[:focus-visible]:ring-offset-2 has-[:focus-visible]:ring-offset-background"
     bind:this={containerEl}
     onclick={() => { containerEl?.querySelector('input')?.focus(); }}

web/src/lib/course.ts

@@ -261,6 +261,86 @@ export function formatMeetingTimesTooltip(meetingTimes: DbMeetingTime[]): string
   return meetingTimes.map(formatMeetingTimeTooltip).join("\n\n");
 }
 
+/**
+ * Delivery concern category for visual accent on location cells.
+ * - "online": fully online with no physical location (OA, OS, OH without INT building)
+ * - "internet": internet campus with INT building code
+ * - "hybrid": mix of online and in-person (HB, H1, H2)
+ * - "off-campus": in-person but not on Main Campus
+ * - null: normal in-person on main campus (no accent)
+ */
+export type DeliveryConcern = "online" | "internet" | "hybrid" | "off-campus" | null;
+
+const ONLINE_METHODS = new Set(["OA", "OS", "OH"]);
+const HYBRID_METHODS = new Set(["HB", "H1", "H2"]);
+const MAIN_CAMPUS = "11";
+const ONLINE_CAMPUSES = new Set(["9", "ONL"]);
+
+export function getDeliveryConcern(course: CourseResponse): DeliveryConcern {
+  const method = course.instructionalMethod;
+  if (method && ONLINE_METHODS.has(method)) {
+    const hasIntBuilding = course.meetingTimes.some((mt: DbMeetingTime) => mt.building === "INT");
+    return hasIntBuilding ? "internet" : "online";
+  }
+  if (method && HYBRID_METHODS.has(method)) return "hybrid";
+  if (course.campus && course.campus !== MAIN_CAMPUS && !ONLINE_CAMPUSES.has(course.campus)) {
+    return "off-campus";
+  }
+  return null;
+}
+
+/** Border accent color for each delivery concern type. */
+export function concernAccentColor(concern: DeliveryConcern): string | null {
+  switch (concern) {
+    case "online":
+      return "#3b82f6"; // blue-500
+    case "internet":
+      return "#06b6d4"; // cyan-500
+    case "hybrid":
+      return "#a855f7"; // purple-500
+    case "off-campus":
+      return "#f59e0b"; // amber-500
+    default:
+      return null;
+  }
+}
+
+/**
+ * Location display text for the table cell.
+ * Falls back to "Online" for online courses instead of showing a dash.
+ */
+export function formatLocationDisplay(course: CourseResponse): string | null {
+  const loc = formatLocation(course);
+  if (loc) return loc;
+  const concern = getDeliveryConcern(course);
+  if (concern === "online") return "Online";
+  return null;
+}
+
+/** Tooltip text for the location column: long-form location + delivery note */
+export function formatLocationTooltip(course: CourseResponse): string | null {
+  const parts: string[] = [];
+
+  for (const mt of course.meetingTimes) {
+    const loc = formatLocationLong(mt);
+    if (loc && !parts.includes(loc)) parts.push(loc);
+  }
+
+  const locationLine = parts.length > 0 ? parts.join(", ") : null;
+
+  const concern = getDeliveryConcern(course);
+  let deliveryNote: string | null = null;
+  if (concern === "online") deliveryNote = "Online";
+  else if (concern === "internet") deliveryNote = "Internet";
+  else if (concern === "hybrid") deliveryNote = "Hybrid";
+  else if (concern === "off-campus") deliveryNote = "Off-campus";
+
+  if (locationLine && deliveryNote) return `${locationLine}\n${deliveryNote}`;
+  if (locationLine) return locationLine;
+  if (deliveryNote) return deliveryNote;
+  return null;
+}
+
 /** Format credit hours display */
 export function formatCreditHours(course: CourseResponse): string {
   if (course.creditHours != null) return String(course.creditHours);

web/src/routes/+page.svelte

@@ -69,21 +69,59 @@ $effect(() => {
   });
 });
 
-// Debounced search
-let searchTimeout: ReturnType<typeof setTimeout> | undefined;
-$effect(() => {
-  const term = selectedTerm;
-  const subs = selectedSubjects;
-  const q = query;
-  const open = openOnly;
-  const off = offset;
-  const sort = sorting;
+// Centralized throttle configuration - maps trigger source to throttle delay (ms)
+const THROTTLE_MS = {
+  term: 0, // Immediate
+  subjects: 100, // Short delay for combobox selection
+  query: 300, // Standard input debounce
+  openOnly: 0, // Immediate
+  offset: 0, // Immediate (pagination)
+  sorting: 0, // Immediate (column sort)
+} as const;
 
+let searchTimeout: ReturnType<typeof setTimeout> | undefined;
+
+function scheduleSearch(source: keyof typeof THROTTLE_MS) {
   clearTimeout(searchTimeout);
   searchTimeout = setTimeout(() => {
-    performSearch(term, subs, q, open, off, sort);
-  }, 300);
+    performSearch(selectedTerm, selectedSubjects, query, openOnly, offset, sorting);
+  }, THROTTLE_MS[source]);
+}
 
+// Separate effects for each trigger source with appropriate throttling
+$effect(() => {
+  selectedTerm;
+  scheduleSearch("term");
+  return () => clearTimeout(searchTimeout);
+});
+
+$effect(() => {
+  selectedSubjects;
+  scheduleSearch("subjects");
+  return () => clearTimeout(searchTimeout);
+});
+
+$effect(() => {
+  query;
+  scheduleSearch("query");
+  return () => clearTimeout(searchTimeout);
+});
+
+$effect(() => {
+  openOnly;
+  scheduleSearch("openOnly");
+  return () => clearTimeout(searchTimeout);
+});
+
+$effect(() => {
+  offset;
+  scheduleSearch("offset");
+  return () => clearTimeout(searchTimeout);
+});
+
+$effect(() => {
+  sorting;
+  scheduleSearch("sorting");
   return () => clearTimeout(searchTimeout);
 });