fix(examples-chat): unblock canonical demo prod deploy (bundle budget + Maps key)

[blove]

Why

The App-mode itinerary cockpit (#772) merged, but the Canonical demo → Vercel job failed on main — so the new frontend never deployed (prod still serves the pre-#772 build).

Two issues, both fixed here:

1. Prod bundle budget exceeded. @angular/google-maps + @angular/cdk/drag-drop + the map/itinerary surface pushed the production initial bundle ~80 kB over the 1.5 MB budget. Only the production config enforces budgets, so every dev build + e2e passed while assemble-demo.ts (nx build … --configuration=production) failed. → Raised the initial budget to 1.75 MB (warn 1.6 MB), matching the feature's real weight. (Same class as the earlier cockpit budget bump.)

2. Maps key not wired into the canonical deploy. The Build and assemble canonical demo step passed no GOOGLE_MAPS_* env, so inject-env baked a keyless bundle → App-mode toggle disabled in prod. → Added GOOGLE_MAPS_API_KEY + GOOGLE_MAPS_MAP_ID (mirroring the ag-ui deploy step; same secret + map id).

Verified

• nx build examples-chat-angular --configuration=production → generation complete (1.58 MB < 1.75 MB).
• ci.yml parses as valid YAML.

Backend already deployed on the #772 merge (Deploy LangGraph succeeded). Once this lands, the canonical demo redeploys with App mode + the map key enabled.

🤖 Generated with Claude Code

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Claude finished @blove's task in 54s —— View job

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PR #776 Review

• Gather context
• Read changed files
• Review CI workflow changes
• Review project.json budget changes
• Post findings

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This is a targeted, two-fix PR. Both changes are correct and well-motivated. A couple of minor observations below.

.github/workflows/ci.yml — Maps env vars

The GOOGLE_MAPS_API_KEY secret reference is correct. The GOOGLE_MAPS_MAP_ID value (86d464ea7d5306034fe2a254) exactly mirrors the ag-ui deploy step (line 929), which confirms consistency. The in-line comment about restricting the key by HTTP referrer is good operational guidance.

One mild concern: the Map ID is now hardcoded in two separate steps. If it ever needs to change, both must be updated together. Consider promoting it to a workflow-level env: variable — but this is not a blocker and matches the existing pattern, so it's fine as-is.

examples/chat/angular/project.json — budget thresholds

Both production and production-debug are updated symmetrically — good. The original maximumWarning: 500kb was almost certainly always firing (the error threshold was already 1.5mb, so the warning was irrelevant noise). The new 1.6mb warn / 1.75mb error pair is coherent and gives ~170 kB headroom above the measured 1.58 MB bundle.

Worth tracking: this is the second budget bump since @angular/google-maps + @angular/cdk/drag-drop landed. If the initial bundle keeps growing, consider whether lazy-loading the map/itinerary surface is practical to keep the budget more meaningful.

Verdict: No bugs or security issues found. Changes are correct — good to merge.