Some local fixes

[Woody4618]

No description provided.

[dev-jodee]

Reviewed locally — 3 fixes. 2 suggested inline below; the 3rd is on a file outside this PR's diff (button-nesting bug surfaced while testing).

3rd fix — button-nesting (webapp/src/components/plan/enhanced-collect-payments.tsx)

React warning: <button> cannot contain a nested <button>. Outer toggle wraps inner SolanaButton (Collect). Outer should be a <div role="button"> with keyboard handlers.

-            <button
+            <div
+                role="button"
+                tabIndex={0}
+                aria-expanded={expanded}
                 className="w-full p-4 flex items-center justify-between cursor-pointer hover:bg-sand-100 transition-colors"
                 onClick={() => setExpanded(!expanded)}
+                onKeyDown={e => {
+                    if (e.key === 'Enter' || e.key === ' ') {
+                        e.preventDefault();
+                        setExpanded(!expanded);
+                    }
+                }}
             >

And close tag at line 346:

-            </button>
+            </div>

Happy to land it in this PR or open a follow-up — your call.

Separate design discussion

While reviewing, also flagged: subscriber can break delegation off-chain (revoke SPL Token approve, change delegate, drain ATA, close ATA) — leaves subscription PDA stuck open with expires_at_ts == 0, plan owner can't cancel. Considering a cancel_broken_subscription instruction with permissionless eviction + on-chain proof. Will open separately, not blocking this PR.