refactor(webapp): use design system tables

[dev-jodee]

Summary

• migrate collection subscriber history tables to @solana/design-system Table primitives
• migrate fixed and recurring delegation tables to @solana/design-system Table primitives
• remove the unused local table primitive

Test Plan

• just fmt-check
• just lint-check
• pnpm --filter webapp build
• pnpm --filter webapp test

[github-actions]

Compute Unit Report

Instruction	Samples	Min CUs	Max CUs	Avg CUs	Est Cost (Low) [SOL]	Est Cost (Med) [SOL]	Est Cost (High) [SOL]
cancel_subscription	11	1805	2129	2013	0.000005000	0.000005080	0.000006006
close_subscription_authority	7	1881	1916	1886	0.000005000	0.000005075	0.000005943
create_fixed_delegation	38	3616	12030	5426	0.000005001	0.000005217	0.000007713
create_plan	84	3540	13450	4668	0.000005001	0.000005186	0.000007334
create_recurring_delegation	27	3640	9645	4646	0.000005001	0.000005185	0.000007323
delete_plan	8	416	416	416	0.000005000	0.000005016	0.000005208
init_subscription_authority	142	7849	37851	12533	0.000005003	0.000005501	0.000011266
revoke_delegation	19	318	585	420	0.000005000	0.000005016	0.000005210
subscribe	21	6670	14170	8466	0.000005002	0.000005338	0.000009233
transfer_fixed	6	10094	11597	10346	0.000005003	0.000005413	0.000010173
transfer_recurring	17	10206	16293	11654	0.000005003	0.000005466	0.000010827
transfer_subscription	10	10441	15064	12280	0.000005003	0.000005491	0.000011140
update_plan	21	424	503	476	0.000005000	0.000005019	0.000005238

Generated: 2026-04-30