Simplify www setup: symlink instead of two copies

/home/claude/www is now a symlink to the repo's www/ directory.
update-costs.sh writes to a single path.

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

www/update-costs.sh

@@ -23,7 +23,7 @@ python3 << 'PYEOF'
 import json, re, sys
 
 IMPACT_LOG = "/home/claude/claude-dir/.claude/impact/impact-log.jsonl"
-PAGES = ["/home/claude/www/index.html", "/home/claude/claude-dir/www/index.html"]
+LANDING_PAGE = "/home/claude/claude-dir/www/index.html"
 
 # Read all entries, keep latest per session
 sessions = {}
@@ -73,17 +73,15 @@ new_para = (
     f"    </div>"
 )
 
-# Read and replace in all landing page copies
-pattern = r"How this was made:</strong>.*?</div>"
-for page in PAGES:
-    try:
-        with open(page) as f:
+# Read and replace
+with open(LANDING_PAGE) as f:
     html = f.read()
+
+pattern = r"How this was made:</strong>.*?</div>"
 new_html = re.sub(pattern, new_para, html, flags=re.DOTALL)
-        with open(page, "w") as f:
+
+with open(LANDING_PAGE, "w") as f:
     f.write(new_html)
-    except FileNotFoundError:
-        pass
 
 print(f"Updated: {n} {session_word}, {total_energy} Wh, {total_co2}g CO2, {cost_display}")
 PYEOF