refactor: remove colon from Deprecated auto models prefix (#1062)

## Summary

- Remove the colon from the "Deprecated: " prefix on auto model names,
changing it to "Deprecated " for cleaner display.
- Updated the source logic in `src/lib/kilo-auto-model.ts` and the
corresponding approval test snapshot in
`src/tests/openrouter-models-sorting.approved.json`.

## Verification

- [x] Grepped the entire codebase for `Deprecated: ` — confirmed only an
unrelated code comment in `packages/db/src/schema.ts` remains (not an
auto model name).
- [x] Typecheck (`pnpm typecheck`) could not run due to missing `tsgo`
binary in the environment; change is a string literal only, no type
impact.

## Visual Changes

N/A

## Reviewer Notes

Straightforward string change — no logic or type changes. The only
remaining `Deprecated: ` in the codebase is a code comment in
`packages/db/src/schema.ts:1077` about a deprecated balance field, which
is unrelated.

Author: markijbema

src/lib/kilo-auto-model.ts

@@ -181,7 +181,7 @@ export function deprecatedAutoModelsToPreventNewExtensionModelPickerFromGettingS
       return {
         ...model,
         id: legacyId,
-        name: 'Deprecated: ' + model.name,
+        name: 'Deprecated ' + model.name,
         description: `${legacyId} is deprecated, use ${model.id} instead`,
       };
     })

src/tests/openrouter-models-sorting.approved.json

@@ -765,7 +765,7 @@
     },
     {
       "id": "kilo/auto",
-      "name": "Deprecated: Kilo Auto Frontier",
+      "name": "Deprecated Kilo Auto Frontier",
       "created": 0,
       "description": "kilo/auto is deprecated, use kilo-auto/frontier instead",
       "architecture": {
@@ -806,7 +806,7 @@
     },
     {
       "id": "kilo/auto-free",
-      "name": "Deprecated: Kilo Auto Free",
+      "name": "Deprecated Kilo Auto Free",
       "created": 0,
       "description": "kilo/auto-free is deprecated, use kilo-auto/free instead",
       "architecture": {
@@ -851,7 +851,7 @@
     },
     {
       "id": "kilo/auto-small",
-      "name": "Deprecated: Kilo Auto Small",
+      "name": "Deprecated Kilo Auto Small",
       "created": 0,
       "description": "kilo/auto-small is deprecated, use kilo-auto/small instead",
       "architecture": {