feat(onboarding): friendlier wizard bootstrap + Done screen starts the daemon

First-run bootstrap polish:
- Failed card wraps the (often long) error instead of clipping it, and offers a
  "Try mirror" button; Retry now keeps whichever source (main/mirror) was used.
- Bootstrap offer shows an honest size/time hint and relabels "Mirror" →
  "Use mirror" with a clearer tooltip.
- Daemon status dot/label is keyed off the EmbeddedDaemon::State enum instead of
  matching the English substring "Stopping" (which broke in every other
  language), and the faint ~55%-alpha label is raised to ~86%.
- Bootstrap Done screen: for the embedded daemon it now offers "Start Daemon"
  (and says the node will start) instead of telling the user to start it by hand.

Also carries the new string-table keys for these (and the shielded-card tooltip
used by the next commit).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/util/i18n.cpp

@@ -899,6 +899,9 @@ void I18n::loadBuiltinEnglish()
         strings_["bootstrap_trust_warning"] = "Only use bootstrap.dragonx.is or bootstrap2.dragonx.is. Using files from untrusted sources could compromise your node.";
         strings_["bootstrap_mirror"] = "Mirror";
         strings_["bootstrap_mirror_tooltip"] = "Download from mirror (bootstrap2.dragonx.is).\nUse this if the main download is slow or failing.";
+        strings_["bootstrap_use_mirror"] = "Use mirror";
+        strings_["bootstrap_use_mirror_tooltip"] = "Download the same bootstrap from the backup server (bootstrap2.dragonx.is) instead of the main one (bootstrap.dragonx.is).\nChoose this if the main download is slow or failing.";
+        strings_["wiz_bootstrap_size_hint"] = "This is a large download. The exact size and a time estimate appear once it starts, and it can be resumed if interrupted.";
         strings_["bootstrap_downloading"] = "Downloading bootstrap...";
         strings_["bootstrap_verifying"] = "Verifying checksums...";
         strings_["bootstrap_extracting"] = "Extracting blockchain data...";
@@ -909,6 +912,8 @@ void I18n::loadBuiltinEnglish()
         strings_["bootstrap_success"] = "Bootstrap Complete";
         strings_["bootstrap_success_desc"] = "Blockchain data has been extracted successfully. Start the daemon to begin syncing from the bootstrap point.";
         strings_["bootstrap_restart_daemon"] = "Restart Daemon";
+        strings_["bootstrap_start_daemon"] = "Start Daemon";
+        strings_["bootstrap_success_desc_start"] = "Blockchain data was extracted successfully. Click Start Daemon to begin syncing from the bootstrap point.";
         strings_["bootstrap_failed"] = "Bootstrap Failed";
         strings_["tt_open_dir"] = "Click to open in file explorer";
         strings_["settings_open_data_dir"] = "Open data folder";
@@ -2323,6 +2328,7 @@ void I18n::loadBuiltinEnglish()
         strings_["balance_mining_fmt"] = "Mining rewards: %.8f";
         strings_["mining_card_tooltip"] = "Solo-mining rewards arrive at your mining (transparent, R…) addresses. Those addresses can't receive payments. Rewards are shielded automatically once they mature.";
         strings_["mining_card_click_to_shield"] = "Click to shield matured rewards now.";
+        strings_["shielded_card_tooltip"] = "Shielded (private) balance: funds held in z-addresses. Amounts, senders and recipients are hidden on the blockchain. Click to open Receive.";
         strings_["contact_chip_mining"] = "Mining only";
         strings_["failed_create_mining_address"] = "Failed to create mining address";
         strings_["new_mining_address_created"] = "New mining address created";