Release v0.62.0-preview.0

What's Changed

• fix(a2a-server): add early return on unsupported store in tasks metadata endpoint by @jesussamuel-byte in #29334
• Changelog for v0.61.0-preview.0 by @gemini-cli-robot in #29344
• Changelog for v0.60.0 by @gemini-cli-robot in #29345
• fix(core,acp): format MCP tool call titles as structured signatures and segregate explanations by @jvargassanchez-dot in #29341
• chore(release): bump version to 0.62.0-nightly.20260915.gae28844fb by @gemini-cli-robot in #29346
• fix(core): retain oauth refresh token on refresh and make credential deletion idempotent by @villahernandez-coder in #29339
• fix(ui): guard against negative layout dimensions in border rendering by @diegogodinezr in #29347
• test(integration): deflake run_shell_command and file-system-interactive tests by @DavidAPierce in #29185
• fix(core): improve PTY file descriptor cleanup and execution lifecycle management by @jesussamuel-byte in #29340
• chore/release: bump version to 0.62.0-nightly.20260918.g9450ade79 by @gemini-cli-robot in #29383
• fix(core): synchronize ConPTY process exit lifecycle and harden PTY output finalization by @jvargassanchez-dot in #29379
• fix(cli): suppress uncaught AbortError logs during request cancellation by @urielefrenvirtusa in #29343
• fix(core,cli): improve terminal buffer memory management and format Windows diagnostic paths by @jesussamuel-byte in #29380
• fix(vscode-ide-companion): preserve terminal focus when closing diff tabs by @amelidev in #29378
• fix(core): update auth error documentation link to valid anchor and add fallback (#26140) by @villahernandez-coder in #29377
• fix(core): normalize proxy-agent esbuild interop for environment proxy resolution by @diegogodinezr in #29401
• fix(cli): emit tool_call update prior to request_permission in ACP mode by @urielefrenvirtusa in #29439
• Feat/gemini 3.8 flash 3.5 flash lite by @DavidAPierce in #29443
• Check for vsc integration test presence when attempting to run. by @DavidAPierce in #29462

Full Changelog: v0.61.0-preview.1...v0.62.0-preview.0