fix(strategy-curator): split tags on commas instead of fusing them — Fixes #76

Add splitTags(raw) next to toDashed: commas and newlines are tag separators,
spaces within a segment stay word-joiners (toDashed). Route both entry points
through it — applyTag (source edit) loops one tag.apply per new tag;
StrategyPicker.addTag appends every split result to pendingTags. Suggestion
clicks pass a single token, which splitTags returns unchanged, so no
regression. Verified with `rsbuild build` — green.

"Quantum Computing, Computational Biology" now yields two chips
(Quantum-Computing, Computational-Biology) instead of one fused mega-tag.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018UYTYu4MAFZ7iyr2VTo2kq

Author: mpstaton

apps/strategy-curator/src/StrategyPicker.svelte

@@ -1,5 +1,5 @@
 <script lang="ts">
-  import { curation, slugify, toDashed } from './curation.svelte';
+  import { curation, slugify, splitTags } from './curation.svelte';
 
   // Mirrors content-ingest's DOMAIN_FOLDERS (services/content-ingest/src/
   // corpus.ts) so the "writes to" preview below matches the actual folder
@@ -32,8 +32,10 @@
     slug = slugify(v);
   }
   function addTag(t: string): void {
-    const tt = toDashed(t);
-    if (tt && !pendingTags.includes(tt)) pendingTags = [...pendingTags, tt];
+    // Commas split into multiple tags; append each new one, deduped.
+    for (const tt of splitTags(t)) {
+      if (!pendingTags.includes(tt)) pendingTags = [...pendingTags, tt];
+    }
     tagInput = '';
   }
   function removeTag(t: string): void {

apps/strategy-curator/src/curation.svelte.ts

@@ -46,6 +46,18 @@ export function toDashed(s: string): string {
     .join('-');
 }
 
+// Split a raw tag entry into one-or-more dashed tags. Commas and newlines are
+// tag SEPARATORS; spaces within a segment stay word-joiners (handled by
+// toDashed). "Quantum Computing, Computational Biology" →
+// ["Quantum-Computing", "Computational-Biology"]. A single token (e.g. a
+// suggestion click) returns a one-element array unchanged.
+export function splitTags(raw: string): string[] {
+  return raw
+    .split(/[,\n]+/)
+    .map(toDashed)
+    .filter(Boolean);
+}
+
 type ConnStatus = 'idle' | 'connecting' | 'open' | 'closed' | 'error' | 'auth_required';
 
 class CurationState {
@@ -447,11 +459,14 @@ class CurationState {
 
   async applyTag(raw: string): Promise<void> {
     const f = this.focused;
-    const tag = toDashed(raw);
-    if (!f || !tag) return;
-    await this.call('tag.apply', { source_uuid: f.source_uuid, domain_type: this.domainType, domain_slug: this.activeSlug, client_slug: this.clientSlug, tag, op: 'add' });
-    f.tags = Array.from(new Set([...(f.tags ?? []), tag]));
-    if (!this.tagVocab.includes(tag)) this.tagVocab = [...this.tagVocab, tag];
+    if (!f) return;
+    // Commas split into multiple tags; add each new one, deduped, in order.
+    for (const tag of splitTags(raw)) {
+      if ((f.tags ?? []).includes(tag)) continue;
+      await this.call('tag.apply', { source_uuid: f.source_uuid, domain_type: this.domainType, domain_slug: this.activeSlug, client_slug: this.clientSlug, tag, op: 'add' });
+      f.tags = Array.from(new Set([...(f.tags ?? []), tag]));
+      if (!this.tagVocab.includes(tag)) this.tagVocab = [...this.tagVocab, tag];
+    }
   }
 
   async removeTag(tag: string): Promise<void> {