Initial implementation of temporal progress page

Seven particle-based progress cards (hour, day, week, month, year, summer, fall)
with work-time mode toggle and bridge days support. Light elegant design with
accumulating particle animation. Express server proxies dagsmart.se API.

.claude/skills/robert/SKILL.md

@@ -0,0 +1,8 @@
+---
+name: robert
+description: Interview the user relentlessly about a plan or design until reaching shared understanding, resolving each branch of the decision tree. Use when user wants to stress-test a plan, get grilled on their design, or mentions "Robert".
+---
+
+Interview me relentlessly about every aspect of this plan until we reach a shared understanding. Walk down each branch of the design tree, resolving dependencies between decisions one-by-one.
+
+If a question can be answered by exploring the codebase, explore the codebase instead.