Fix wallet lazy-load, upload seed and track follow-ups

[dylanjeffers]

Follow-ups from reviewing #14561, #14562, #14567, #14568, #14569, #14570, #14571 and #14572.

Logic fixes

• Wallet auth, reconnect race (perf(web): load the wallet and payment SDKs on demand #14567): a lazily loaded wagmi config starts out disconnected, and only WagmiProvider's re-render kicks off reconnect(). If the SDK read the status first, an external-wallet user was cached with an empty Hedgehog client. getAudiusWalletClient now starts the reconnect itself.
• Wallet auth, failed chunk load (perf(web): load the wallet and payment SDKs on demand #14567): if the AppKit chunk failed to load, initSdk threw and left inProgress stuck, so every later audiusSdk() call hung. It now falls back to Hedgehog, and the memoized import resets so it can be retried.
• Direct AppKit imports (perf(web): load the wallet and payment SDKs on demand #14567): importing ReownAppKitModal directly (Buy/Sell, sign-in) never marked AppKit as loaded. wagmi hooks kept reading the placeholder config, and sign-out skipped the wallet disconnect. The module now registers itself when it is evaluated.
• Placeholder wagmi config (perf(web): load the wallet and payment SDKs on demand #14567): it silently reconnected any injected wallet the site had been authorized for, because injected-wallet discovery was on and there was no storage. Discovery is now off and it has no connectors.
• Duplicate chain definition (perf(web): load the wallet and payment SDKs on demand #14567): audiusChain was defined twice; there is now one definition.
• Upload seed (fix(upload): stop the track form wiping description and tags on reinitialize #14561): the upload form re-applied initialMetadata (contest genre/remix/artwork, coin-gate conditions) on every reinitialize. Example: switching a coin-gated upload to Public, cancelling the confirm modal and continuing again brought the gate back. The seed is now applied once, when leaving the select step.
• Lazy Lottie playback (perf(web): replace the Lottie spinner with CSS and defer lottie-web #14568): effects that call lottieRef.current.play() ran before the lazy chunk loaded and never re-ran, so the play-bar loading spinner could stay frozen. LazyLottie now reports when the ref is ready (callers re-run their effect) and renders a sized placeholder while the chunk loads.
• Unavailable tracks (fix(track): honor is_streamable so inactive artists' tracks don't render or unfurl #14570/fix(track): render unavailable tracks as a 404 instead of a custom tombstone #14572): owners are exempt from the non-streamable redirect, so an artist can reach their own track once the API also flags no-audio tracks (api#1032). The redirect to 404 now replaces history, so Back doesn't loop.
• Empty-feed suggestions (feat(client): personalize empty-feed follow suggestions #14562): mobile web now uses the personalized follow suggestions, and the native empty feed switches its copy when suggestions are personalized.

Comment cleanup: shortened or removed long history-style comments from these PRs, and dropped the no-track_cid claim, since api#1032 isn't merged.

Tests

• tsc passes for web, common, harmony, mobile and sdk.
• vitest passes: UploadTrackForm.test.ts, the new SelectPage.test.ts and trackAvailability.test.ts, FanClubDetailPage.test.tsx, ProfilePage.test.tsx.
• eslint passes on changed files.
• Local dev server:
  • A signed-out visitor with no persisted wallet doesn't load AppKit.
  • With a fake persisted wagmi.store, AppKit loads, the reconnect runs, and the SDK initializes (falls back to Hedgehog, no hang).
  • Importing ReownAppKitModal directly marks AppKit as loaded.
• Not tested with a real external wallet.

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