Offboarded Kevin Chang to alumni

Moved Kevin Chang from active members to alumni_undergrads (2025-2026),
updated CV entry, and rebuilt people.html.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: jeremymanning

data/people.xlsx

@@ -748,7 +748,7 @@ \subsection*{Mentorship  (selected)}
   \item Will Lehman (2025 -- )
   \item Luca Gandrud (2025 -- 2026)
   \item Sam Haskel* (2025 -- )
-  \item Kevin Chang (2025 -- )
+  \item Kevin Chang (2025 -- 2026)
   \item Andrew Richardson (2025 -- )
   \item Ben Hanson (2025 -- )
   \item Annabelle Morrow (2025 -- 2026)

documents/JRM_CV.tex

@@ -174,24 +174,19 @@ <h3>ellie mattox | undergrad</h3>
                     <h3>evan mcdermid | undergrad</h3>
                     <p>Evan is a Mathematics major and Computer Science minor. He is interested in algorithmic trading, algorithmic problem solving, and building models of financial market dynamics.</p>
                 </div>
-                <div class="person-card">
-                    <img src="images/people/placeholder.png" alt="kevin chang">
-                    <h3>kevin chang | undergrad</h3>
-                    <p>From Taipei and Boston, Kevin is a ‘29 studying Applied Math and CS. He is passionate about quantitative finance, machine learning, and health analytics. His long term goal is to develop data-driven solutions to optimize inefficiencies in the US healthcare system.</p>
-                </div>
                 <div class="person-card">
                     <img src="images/people/sam_haskel.png" alt="sam haskel">
                     <h3>sam haskel | undergrad</h3>
                     <p>Sam is a double major in Quantitative Social Science and Economics, interested in how social peer influences shape beliefs and affect decision-making. He enjoys playing sports, spending time outdoors, and hanging out with friends and family.</p>
                 </div>
-            </div>
-
-            <div class="people-grid">
                 <div class="person-card">
                     <img src="images/people/will_lehman.png" alt="will lehman">
                     <h3>will lehman | undergrad</h3>
                     <p>Will is a '27 from Salt Lake City, Utah. He likes skiing, playing hockey, and working on new projects.</p>
                 </div>
+            </div>
+
+            <div class="people-grid">
                 <div class="person-card">
                     <img src="images/people/theo_larson.png" alt="theo larson">
                     <h3>theo larson | undergrad</h3>
@@ -202,14 +197,14 @@ <h3>theo larson | undergrad</h3>
                     <h3>jason kang | undergrad</h3>
                     <p>Jason, a member of the class of 2028, plans to major in Psychology. He enjoys games, hiking, and watching sports like basketball and tennis.</p>
                 </div>
-            </div>
-
-            <div class="people-grid">
                 <div class="person-card">
                     <img src="images/people/mak_kelly.png" alt="mak kelly">
                     <h3>mak kelly | undergrad</h3>
                     <p>Mak, a '28 math and computer science major, is interested in entrepreneurship and plays rugby for Dartmouth.</p>
                 </div>
+            </div>
+
+            <div class="people-grid">
                 <div class="person-card">
                     <img src="images/people/isaac_cheon.png" alt="isaac cheon">
                     <h3>isaac cheon | undergrad</h3>
@@ -275,6 +270,7 @@ <h3>Lab Managers</h3>
                 <div>
                     <h3>Undergraduate Researchers</h3>
                     <p class="alumni-list">
+                        Kevin Chang (2025-2026)<br>
                         Jackson C. Sandrich (2025-2026)<br>
                         Luca Gandrud (2025-2026)<br>
                         Annabelle Morrow (2025-2026)<br>