update config, admin-web tooling & relocate agent skills

Update app.json config and add new dependencies in package.json. Update
.gitignore for new patterns. Add timed-exercise editor/list components,
warmup/stretch video migration, and Supabase helpers in admin-web.
Relocate agent skills from .agents/skills/ to .opencode/skills/.

admin-web/app/programs/[id]/edit/page.tsx

@@ -17,7 +17,9 @@ async function getProgram(id: string) {
   const { data, error } = await (supabase.from("workout_programs") as any)
     .select(`
       *,
-      program_tabatas (*)
+      program_tabatas (*),
+      workout_warmup_exercises (*),
+      workout_stretch_exercises (*)
     `)
     .eq("id", id)
     .single()
@@ -30,6 +32,17 @@ async function getProgram(id: string) {
   if (data.program_tabatas) {
     data.program_tabatas.sort((a: any, b: any) => a.position - b.position)
   }
+  if (data.workout_warmup_exercises) {
+    data.workout_warmup_exercises.sort((a: any, b: any) => a.position - b.position)
+  }
+  if (data.workout_stretch_exercises) {
+    data.workout_stretch_exercises.sort((a: any, b: any) => a.position - b.position)
+  }
+
+  // Map to ProgramForm's expected shape
+  data.tabatas = data.program_tabatas
+  data.warmup = data.workout_warmup_exercises
+  data.stretch = data.workout_stretch_exercises
 
   return data
 }