ci: replace hand-maintained feature-soundness scripts with cargo-hack

[Madoshakalaka]

Description

98 combinations from the full powerset might be unrealistic for CI

that's why there's --exclude-features test,serde,not_browser_env. These features don't gate any code paths

This then results in 14 clippy invocations are identical to what the old scripts ran, but now auto-discovered by cargo hack, so when features are added/removed, CI adapts automatically

--keep-going added so all failures are reported at once

Fixes #2641

Checklist

• I have reviewed my own code

[github-actions]

Visit the preview URL for this PR (updated for commit 26462bf):

https://yew-rs-api--pr4013-feat-cargo-hack-feat-3dhwlmdc.web.app

_{(expires Fri, 06 Mar 2026 08:56:14 GMT)}

_{🔥 via Firebase Hosting GitHub Action 🌎}

[github-actions]

Benchmark - core

Yew Master

vnode           fastest       │ slowest       │ median        │ mean          │ samples │ iters
╰─ vnode_clone  2.748 ns      │ 4.142 ns      │ 3.992 ns      │ 3.455 ns      │ 100     │ 1000000000

Pull Request

vnode           fastest       │ slowest       │ median        │ mean          │ samples │ iters
╰─ vnode_clone  2.776 ns      │ 4.346 ns      │ 2.781 ns      │ 2.841 ns      │ 100     │ 1000000000

[github-actions]

Size Comparison

Details

examples	master (KB)	pull request (KB)	diff (KB)	diff (%)
async_clock	96.691	96.691	0	0.000%
boids	165.387	165.387	0	0.000%
communication_child_to_parent	89.882	89.882	0	0.000%
communication_grandchild_with_grandparent	100.924	100.924	0	0.000%
communication_grandparent_to_grandchild	97.420	97.420	0	0.000%
communication_parent_to_child	87.297	87.297	0	0.000%
contexts	102.917	102.917	0	0.000%
counter	84.030	84.030	0	0.000%
counter_functional	85.377	85.377	0	0.000%
dyn_create_destroy_apps	87.023	87.023	0	0.000%
file_upload	96.557	96.557	0	0.000%
function_delayed_input	90.956	90.956	0	0.000%
function_memory_game	168.924	168.924	0	0.000%
function_router	402.408	402.408	0	0.000%
function_todomvc	160.895	160.895	0	0.000%
futures	232.361	232.361	0	0.000%
game_of_life	102.204	102.204	0	0.000%
immutable	244.353	244.353	0	0.000%
inner_html	78.611	78.611	0	0.000%
js_callback	106.553	106.553	0	0.000%
keyed_list	177.156	177.156	0	0.000%
mount_point	81.742	81.742	0	0.000%
nested_list	110.727	110.727	0	0.000%
node_refs	89.185	89.185	0	0.000%
password_strength	1726.269	1726.269	0	0.000%
portals	90.762	90.762	0	0.000%
router	374.131	374.131	0	0.000%
suspense	110.940	110.940	0	0.000%
timer	86.487	86.487	0	0.000%
timer_functional	96.045	96.045	0	0.000%
todomvc	139.498	139.498	0	0.000%
two_apps	83.893	83.893	0	0.000%
web_worker_fib	133.651	133.651	0	0.000%
web_worker_prime	184.603	184.603	0	0.000%
webgl	81.166	81.166	0	0.000%

✅ None of the examples has changed their size significantly.

[Madoshakalaka]

The feature soundness tests actually complete in 2 minutes, which is faster than documentation tests (3 mins), unit test (5 mins), and integration tests (5 mins), not mentioning SSR benchmarks (15+ minutes)

so a full powerset with 7 times the invocation is not unrealistic. I don't oppose adding them too but they might not add much value.

For reference

Feature	cfg(feature usages in packages/yew/src	Purpose
csr	Heavy (dom_bundle, renderer, lifecycle)	Client-side rendering
ssr	Heavy (server_renderer, hydration hooks)	Server-side rendering
hydration	Heavy (implies csr, bincode)	Hydration of SSR markup
default	Toggles behavior in some paths	Default feature set
serde	0 — just passes to implicit-clone	Serde support for types
not_browser_env	0	Non-browser environment flag
test	2, both alongside #[cfg(test)]	Test utilities

[github-actions]

Benchmark - SSR

Yew Master

Details

Benchmark	Round	Min (ms)	Max (ms)	Mean (ms)	Standard Deviation
Baseline	10	257.962	258.368	258.109	0.121
Hello World	10	454.624	467.368	458.897	3.332
Function Router	10	38613.669	39300.850	38953.595	213.846
Concurrent Task	10	1005.615	1006.872	1006.380	0.412
Many Providers	10	1049.422	1104.803	1069.046	19.389

Pull Request

Details

Benchmark	Round	Min (ms)	Max (ms)	Mean (ms)	Standard Deviation
Baseline	10	257.979	259.503	258.303	0.447
Hello World	10	461.412	475.461	465.351	4.276
Function Router	10	38727.891	39142.046	38951.575	141.568
Concurrent Task	10	1005.721	1006.728	1006.288	0.367
Many Providers	10	1033.427	1076.381	1048.551	13.214