Move GLM 5.2 to 5.3

GLM 5.3 supersedes 5.2, so every reference to the older id follows it: the zai
preset's opus, sonnet and fable tiers, and the fable tier of `default`, which
routes to the same model through OpenRouter.

Also the hardcoded Z.AI entries in both builds' model pickers, which are the one
place a model id is not read from a preset - leaving those would have gone on
offering a superseded model from the menu while the presets used the new one.

haiku stays on glm-4.7: that is the fast/cheap tier, not a 5.x.

claude-mode.ps1

@@ -1251,7 +1251,7 @@ function Invoke-Models {
 
     if ($mode -eq 'zai') {
         Write-Head 'Z.AI GLM models (from Z.AI docs - no public catalogue endpoint)'
-        @('glm-5.2  - flagship coding model (opus/sonnet tier)',
+        @('glm-5.3  - flagship coding model (opus/sonnet tier)',
           'glm-4.7  - fast/cheap tier (haiku tier)') | ForEach-Object { Write-Host "  $_" }
         Write-Host '  Full list: https://docs.z.ai/devpack/tool/claude'
         return
@@ -1856,7 +1856,7 @@ function Get-ModelChoices {
     elseif ($provider -eq 'zai') {
         # Z.AI publishes no public catalogue endpoint; these are the documented
         # coding-plan models. Anything else can still be typed manually.
-        $out += [pscustomobject]@{ Id = 'glm-5.2'; Key = 'glm-5.2'; Label = 'glm-5.2'; Detail = @('flagship coding model - opus/sonnet tier') }
+        $out += [pscustomobject]@{ Id = 'glm-5.3'; Key = 'glm-5.3'; Label = 'glm-5.3'; Detail = @('flagship coding model - opus/sonnet tier') }
         $out += [pscustomobject]@{ Id = 'glm-4.7'; Key = 'glm-4.7'; Label = 'glm-4.7'; Detail = @('fast/cheap tier - haiku') }
     }