feat(entity-review): add 'provides match' toggle for source URLs

- Add toggle in source URL form to indicate when a source provides
  sufficient information to create a person profile without LinkedIn
- Store provides_match boolean in source observation data
- Display green badge on existing sources that have provides_match: true
- Include bilingual tooltip (EN/NL) explaining the toggle purpose

frontend/src/pages/EntityReviewPage.css

@@ -2604,6 +2604,67 @@
   color: #6b7280;
 }
 
+/* Source URL Header (link + badge) */
+.source-url-header {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  flex-wrap: wrap;
+}
+
+/* Provides Match Toggle */
+.provides-match-toggle {
+  display: flex;
+  align-items: center;
+  padding: 0.5rem 0;
+}
+
+.provides-match-toggle .toggle-label {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  cursor: pointer;
+  font-size: 0.8125rem;
+  color: var(--text-secondary, #64748b);
+}
+
+.provides-match-toggle input[type="checkbox"] {
+  width: 16px;
+  height: 16px;
+  accent-color: #10b981;
+  cursor: pointer;
+}
+
+.provides-match-toggle .toggle-text {
+  color: var(--text-primary, #1e293b);
+}
+
+.dark .provides-match-toggle .toggle-text {
+  color: var(--text-primary, #e2e8f0);
+}
+
+.provides-match-toggle svg {
+  color: var(--text-secondary, #94a3b8);
+  cursor: help;
+}
+
+/* Provides Match Badge on existing source URLs */
+.provides-match-badge {
+  display: inline-flex;
+  align-items: center;
+  gap: 0.25rem;
+  padding: 2px 6px;
+  background: rgba(16, 185, 129, 0.15);
+  color: #10b981;
+  border-radius: 4px;
+  font-size: 0.6875rem;
+  font-weight: 500;
+}
+
+.dark .provides-match-badge {
+  background: rgba(16, 185, 129, 0.2);
+}
+
 /* WCMS-Only Profiles Styles */
 .wcms-only-search {
   position: relative;

frontend/src/pages/EntityReviewPage.tsx

@@ -145,6 +145,7 @@ interface SourceUrlItem {
   source_type?: string;
   source_domain?: string;
   comment?: string;
+  provides_match?: boolean;
   added_at?: string;
   added_manually?: boolean;
 }
@@ -402,6 +403,7 @@ export default function EntityReviewPage() {
   const [showSourceUrlInput, setShowSourceUrlInput] = useState(false);
   const [sourceUrl, setSourceUrl] = useState('');
   const [sourceComment, setSourceComment] = useState('');
+  const [sourceProvidesMatch, setSourceProvidesMatch] = useState(false);
   const [addingSourceUrl, setAddingSourceUrl] = useState(false);
   const [sourceUrlError, setSourceUrlError] = useState<string | null>(null);
   const [sourceUrlSuccess, setSourceUrlSuccess] = useState<string | null>(null);
@@ -714,6 +716,7 @@ export default function EntityReviewPage() {
         source_url: sourceUrl.trim(),
         comment: sourceComment.trim() || undefined,
         source_type: 'webpage',
+        provides_match: sourceProvidesMatch,
       };
       
       // For WCMS-only profiles, include WCMS metadata
@@ -747,6 +750,7 @@ export default function EntityReviewPage() {
       // Clear inputs and show success
       setSourceUrl('');
       setSourceComment('');
+      setSourceProvidesMatch(false);
       setSourceUrlSuccess(result.message || (language === 'nl' ? 'Bron toegevoegd' : 'Source added'));
       
       // Hide success message after 3 seconds
@@ -765,7 +769,7 @@ export default function EntityReviewPage() {
     } finally {
       setAddingSourceUrl(false);
     }
-  }, [selectedProfile, sourceUrl, sourceComment, language, fetchProfileDetail, fetchWcmsOnlyProfileDetail]);
+  }, [selectedProfile, sourceUrl, sourceComment, sourceProvidesMatch, language, fetchProfileDetail, fetchWcmsOnlyProfileDetail]);
 
   // Save review decision
   const saveDecision = useCallback(async (decision: 'match' | 'not_match' | 'uncertain') => {
@@ -2143,16 +2147,27 @@ export default function EntityReviewPage() {
                               }
                               return (
                               <div key={source.source_id} className="source-url-item">
-                                <a 
-                                  href={source.source_url} 
-                                  target="_blank" 
-                                  rel="noopener noreferrer"
-                                  className="source-url-link"
-                                  title={source.source_url}
-                                >
-                                  <Globe size={12} />
-                                  {displayUrl}
-                                </a>
+                                <div className="source-url-header">
+                                  <a 
+                                    href={source.source_url} 
+                                    target="_blank" 
+                                    rel="noopener noreferrer"
+                                    className="source-url-link"
+                                    title={source.source_url}
+                                  >
+                                    <Globe size={12} />
+                                    {displayUrl}
+                                  </a>
+                                  {source.provides_match && (
+                                    <span 
+                                      className="provides-match-badge" 
+                                      title={language === 'nl' ? 'Bron volstaat als match' : 'Provides match'}
+                                    >
+                                      <CheckCircle size={10} />
+                                      {language === 'nl' ? 'Match' : 'Match'}
+                                    </span>
+                                  )}
+                                </div>
                                 {source.comment && (
                                   <div className="source-url-comment">
                                     "{source.comment}"
@@ -2204,6 +2219,32 @@ export default function EntityReviewPage() {
                               disabled={addingSourceUrl}
                               rows={2}
                             />
+                            <div className="provides-match-toggle">
+                              <label className="toggle-label">
+                                <input
+                                  type="checkbox"
+                                  checked={sourceProvidesMatch}
+                                  onChange={(e) => setSourceProvidesMatch(e.target.checked)}
+                                  disabled={addingSourceUrl}
+                                />
+                                <span className="toggle-text">
+                                  {language === 'nl' ? 'Bron volstaat als match' : 'Provides match'}
+                                </span>
+                                <Tooltip 
+                                  position="top"
+                                  maxWidth={300}
+                                  content={
+                                    <div>
+                                      {language === 'nl' 
+                                        ? 'Wanneer ingeschakeld, biedt deze bron voldoende informatie om deze persoon te identificeren en een volledig persoonsprofiel aan te maken zonder LinkedIn-match.'
+                                        : 'When enabled, this source provides sufficient information to identify this person and create a complete person profile without needing a LinkedIn match.'}
+                                    </div>
+                                  }
+                                >
+                                  <Info size={14} />
+                                </Tooltip>
+                              </label>
+                            </div>
                             <button
                               className="add-source-url-btn"
                               onClick={addSourceUrl}

src/glam_extractor/api/entity_review.py

@@ -424,6 +424,7 @@ class AddSourceUrlRequest(BaseModel):
     source_url: str
     comment: Optional[str] = None  # User comment explaining the source, e.g., "De lessen worden gegeven door Mala Sardjoepersad"
     source_type: Optional[str] = None  # Optional type: "webpage", "social_media", "news_article", etc.
+    provides_match: bool = False  # When True, this source provides sufficient info to identify the person without LinkedIn
     # Optional WCMS data for profiles that aren't in the candidates file
     wcms_name: Optional[str] = None
     wcms_email: Optional[str] = None
@@ -2634,6 +2635,7 @@ async def add_source_url(request: AddSourceUrlRequest):
     wcms_ppid = request.wcms_ppid
     comment = request.comment.strip() if request.comment else None
     source_type = request.source_type or "webpage"
+    provides_match = request.provides_match
     
     # Load candidates from the aggregated file
     load_candidates()
@@ -2681,6 +2683,7 @@ async def add_source_url(request: AddSourceUrlRequest):
         "source_type": source_type,
         "source_domain": parsed.netloc,
         "comment": comment,
+        "provides_match": provides_match,
         "added_at": datetime.now(timezone.utc).isoformat(),
         "added_manually": True
     }