fix: lsp startup failure

[bajrangCoder]

No description provided.

[greptile-apps]

Greptile Summary

This PR fixes LSP startup failures by expanding port file discovery to include a new /public directory path used by newer Terminal builds, in addition to the legacy /alpine/home path. It also makes port discovery failures explicit by throwing an error (surfacing it in the status bar and cleaning up state) instead of silently proceeding without a discovered port.

Confidence Score: 4/5

Safe to merge — the fix correctly broadens port file search paths and makes startup failures explicit with proper cleanup.

No P0/P1 bugs found. Changes are well-scoped: multi-path discovery is correct, the new throw surfaces real failures, and cleanup in the catch block is complete. One minor silent-failure edge (already-managed server, bridge mode, no port found) falls through without a port but is pre-existing behaviour not worsened by this PR.

No files require special attention.

Important Files Changed

Filename	Overview
src/cm/lsp/serverLauncher.ts	Refactored port file discovery to return multiple candidate paths (public + alpine/home) and iterate them; added explicit error throw when port discovery fails post-start; new early-return path in ensureServerRunning for already-managed servers missing a port
bun.lock	DOMPurify bumped from 3.3.3 to 3.4.1 (dependency range updated to ^3.4.0); a scoped alias mermaid/dompurify pinned to 3.3.3 was added to preserve mermaid's internal DOMPurify version

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[ensureServerRunning] --> B{managedServers has key?}
    B -- Yes --> C{bridge && !bridge.port?}
    C -- Yes --> D{existing.port?}
    D -- Yes --> E[Return uuid + existing.port]
    D -- No --> F[getLspPort - try /public then /alpine/home]
    F -- Found --> G[Cache port, return uuid + port]
    F -- Not found --> H[Return uuid only - no port]
    C -- No --> H
    B -- No --> I[resolveStartCommand]
    I --> J[startInteractiveServer]
    J --> K{bridge && !bridge.port?}
    K -- Yes --> L[waitForPort 10s]
    L -- Found --> M[Cache port in entry]
    M --> N[Return uuid + discoveredPort]
    L -- Not found --> O[throw Error - port undiscovered]
    O --> P[catch: show error, stop server, delete entry, throw LSP_SERVER_UNAVAILABLE]
    K -- No --> Q{server.transport.url?}
    Q -- Yes --> R[waitForWebSocket]
    R --> N
    Q -- No --> N

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