Paragon: Save-Current build, archive retired share codes, reset clears active

Server side of the v0.7.10 Builds drop. Squashes a few footguns from
the original Builds catalog and adds a one-click "save what I have
right now" path the Overview pane can hook directly into.

- HandleBuildSaveCurrent: new C BUILD SAVE_CURRENT verb. Inserts a
  fresh build row, snapshots the live panel into its recipe, sets it
  active. No AE/TE motion, no relearning -- just a named slot for
  whatever the player already has.
- Reset abilities / Reset talents now SetActiveBuildId(0) and re-push
  the catalog. Without this, the next swap silently overwrote the
  active build's saved recipe with the (now empty/partial) post-reset
  state -- effectively erasing the build.
- Delete of the *active* build is now a hard reset (HandleParagonResetAll):
  unlearn everything the panel bought, refund all AE/TE. Deleting a
  non-active slot still just removes the saved recipe row + parked pet.
- Load of the currently-active build is now a "revert to last snapshot"
  instead of a no-op refresh: keeps the saved recipe authoritative,
  parks the pet, resets, re-applies. Useful for discarding pending
  edits.
- After a successful Learn All while a build is active: archive the
  build's previous share_code + recipe into
  character_paragon_build_share_archive* (so codes already posted to
  Discord keep importing the frozen loadout), snapshot the new panel
  into the live build, assign a fresh share_code, push catalog.
- HandleBuildImport now falls back to the archive tables when a code
  isn't in the live catalog -- old shared codes resurrect the recipe
  they pointed at when they were retired.
- Imports never copy pet_number (the parked pet belongs to the source
  player); if the imported recipe contains Tame Beast we hint that the
  importer needs to tame their own pet.
- BuildPanelOwnedSpellsAllowlist now walks SPELL_EFFECT_LEARN_SPELL
  effects on talent rank spells (Mangle, Feral Charge, Mutilate, ...)
  so the login cascade sweep stops revoking talent-granted active
  abilities.

Schema: new mod-paragon migration 2026_05_10_05.sql adds
character_paragon_build_share_archive (+ _spells / _talents).

Co-authored-by: Cursor <cursoragent@cursor.com>

modules/mod-paragon/data/sql/db-characters/updates/2026_05_10_05.sql

@@ -0,0 +1,34 @@
+-- mod-paragon: preserve superseded share codes as importable snapshots.
+-- ----------------------------------------------------------------------------
+-- When an active build is updated (Learn All), the live row gets a new
+-- share_code and a fresh recipe. Older codes the player posted to Discord
+-- must keep working: each retired code is frozen here with its spell/talent
+-- recipe so `C BUILD IMPORT <code>` still materializes that exact loadout.
+-- ----------------------------------------------------------------------------
+
+CREATE TABLE IF NOT EXISTS `character_paragon_build_share_archive` (
+    `share_code` CHAR(6) NOT NULL COMMENT 'retired code (same charset as live builds)',
+    `name`       VARCHAR(32)  NOT NULL,
+    `icon`       VARCHAR(64)  NOT NULL DEFAULT 'INV_Misc_QuestionMark',
+    `archived_at` TIMESTAMP   NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    PRIMARY KEY (`share_code`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
+    COMMENT='mod-paragon: frozen build metadata for retired share codes';
+
+CREATE TABLE IF NOT EXISTS `character_paragon_build_share_archive_spells` (
+    `share_code` CHAR(6)      NOT NULL,
+    `spell_id`   INT UNSIGNED NOT NULL,
+    PRIMARY KEY (`share_code`, `spell_id`),
+    KEY `idx_share` (`share_code`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
+    COMMENT='mod-paragon: spell recipe rows for an archived share code';
+
+CREATE TABLE IF NOT EXISTS `character_paragon_build_share_archive_talents` (
+    `share_code` CHAR(6)       NOT NULL,
+    `spec`       TINYINT UNSIGNED NOT NULL,
+    `talent_id`  SMALLINT UNSIGNED NOT NULL,
+    `rank`       TINYINT UNSIGNED NOT NULL,
+    PRIMARY KEY (`share_code`, `spec`, `talent_id`),
+    KEY `idx_share` (`share_code`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
+    COMMENT='mod-paragon: talent recipe rows for an archived share code';