Improve DeepSeek request failure handling

[Vizards]

Summary

• surface HTTP and network failures with user-facing DeepSeek error messages instead of generic fetch failures
• add provider-aware error action links through VS Code URI callbacks
• split the client and runtime activation code into focused modules

Validation

• npm run format:check && npm run compile && npm run lint

[Copilot]

Pull request overview

This PR improves how the extension surfaces DeepSeek request failures (HTTP + network), adds provider-aware “action links” via VS Code URI callbacks, and refactors activation/runtime code into smaller focused modules.

Changes:

• Introduce a structured DeepSeek client error model (HTTP/network/unknown) with localized, user-facing summaries and richer diagnostics.
• Add URI-handler-backed action links (e.g., set API key, show logs) and activate the extension on URI open.
• Split extension activation into src/runtime/* modules and keep src/extension.ts as a thin entrypoint.

Reviewed changes

Copilot reviewed 18 out of 18 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/runtime/welcome.ts	Extracts “show welcome walkthrough if needed” logic into runtime module.
src/runtime/provider.ts	Centralizes provider construction + command registration + Copilot Chat activation.
src/runtime/lifecycle.ts	New activate/deactivate lifecycle wrapper with guarded activation + welcome flow.
src/runtime/index.ts	Barrel export for runtime lifecycle.
src/runtime/diagnostics.ts	Extracted activation diagnostics + debugMode change logging.
src/runtime/commands.ts	Registers extension commands (logs, request dumps, API key page, settings).
src/runtime/actions.ts	Registers URI handler and resolves provider action URLs for error messages.
src/provider/stream.ts	Wraps streamed request errors into user-facing DeepSeek error messages.
src/i18n.ts	Adds localized strings for HTTP/network error summaries and action labels.
src/extension.ts	Simplifies entrypoint to re-export runtime activate/deactivate.
src/consts.ts	Adds constants for handled URI paths (show logs / set API key).
src/client/types.ts	Adds shared client error/action-link types.
src/client/index.ts	Exposes client + error helpers via a public barrel.
src/client/error.ts	Implements DeepSeekRequestError, normalization, user-facing markdown formatting, and action selection.
src/client/core.ts	Updates client to throw structured HTTP errors and normalize/log network failures.
src/client/consts.ts	Adds provider link definitions and a curated network-error code categorization table.
package.json	Adds onUri activation to support URI action links even before startup activation.
.vscode/settings.json	Updates workspace TypeScript SDK setting key.

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[Copilot]

Pull request overview

Copilot reviewed 18 out of 18 changed files in this pull request and generated 1 comment.

[Copilot]

Pull request overview

Copilot reviewed 18 out of 18 changed files in this pull request and generated 2 comments.

[Copilot]

Pull request overview

Copilot reviewed 18 out of 18 changed files in this pull request and generated 1 comment.

[Copilot]

Pull request overview

Copilot reviewed 18 out of 18 changed files in this pull request and generated 2 comments.

Comments suppressed due to low confidence (1)

src/client/core.ts:176

• In the catch path, the method calls callbacks.onError(normalizedError) but does not rethrow/reject afterwards. That means errors can be silently swallowed if an onError implementation doesn’t throw (the StreamCallbacks contract returns void). Consider rethrowing normalizedError after invoking the callback (while still allowing a callback-thrown error to propagate) so callers can reliably observe failures via the returned Promise.

[Copilot]

Pull request overview

Copilot reviewed 18 out of 18 changed files in this pull request and generated 2 comments.

[Copilot]

Pull request overview

Copilot reviewed 18 out of 18 changed files in this pull request and generated no new comments.