fix(web): remove Ask suggested example queries

[msukkari]

Fixes SOU-2282

Remove the Ask landing page's suggested example query row and delete its dedicated component, question data, and tests. The Ask input, toolbar, repository scope, model selector, and Ask button remain unchanged.

Validation:

• yarn workspace @sourcebot/web lint
• yarn workspace @sourcebot/web test --run (147 files, 1503 tests passed)
• E2E on http://localhost:3000/chat: the Ask empty state loads with no Ask questions about: label or suggestion pills. The Ask input, repository scope, model selector, and Ask control remain visible, and the Ask mode control opens its menu. No LLM-backed query was submitted because this cloud environment has no configured language model.

Ask landing page without suggested example queries
ask_home_suggestions_removed_e2e.mp4

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Summary by cubic

Fixes SOU-2282 by removing the suggested example query row from the Ask landing page, along with its component, question data, and tests. Adds a changelog entry under unreleased changes. The Ask input, toolbar, repository scope, model selector, and Ask button remain unchanged.

^{Written for commit 9a97e4e. Summary will update on new commits.}

Summary by CodeRabbit

• Removed
  • Removed example-question prompt options and category badges from the chat landing page.
  • Chat no longer displays randomly selected example questions for users to choose from.
  • Removed the ability to insert suggested questions directly into the chat editor through these options.
• Documentation
  • Updated the changelog to reflect the removal of suggested example queries and moved the entry to the unreleased changes.

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Walkthrough

The chat landing page no longer displays random example-question badges. The example-question catalog, badge component, selection logic, related tests, and changelog entry were removed or updated.

Changes

Chat example-question removal

Layer / File(s)	Summary
Remove example-question feature packages/web/src/app/(app)/chat/components/exampleQuestions.ts, packages/web/src/app/(app)/chat/components/exampleQuestions.test.ts, packages/web/src/app/(app)/chat/components/exampleQuestionBadges.tsx, packages/web/src/app/(app)/chat/components/exampleQuestionBadges.test.tsx	The example-question catalog, random-selection function, badge component, and associated tests were deleted.
Remove landing-page integration packages/web/src/app/(app)/chat/chatLandingPage.tsx, CHANGELOG.md	The landing page no longer imports example-question modules, selects three questions, or renders the badge component. The changelog records the removal of suggested example queries in the unreleased fixes section.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~5 minutes

Change: Bug fix

Merge Risk: ⚪ Minimal · up to abc79

The Ask example-query row is removed while the remaining controls stay unchanged, with no actionable merge-blocking risk identified.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly identifies the web fix and the removal of Ask suggested example queries, which matches the primary changeset.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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Actionable comments posted: 1

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• 🪄 Fix CodeRabbit comments on this PR

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Inline comments:
In `@CHANGELOG.md`:
- Line 20: Move the “Removed suggested example queries from the Ask landing
page” entry from the 5.1.14 section into the [Unreleased] Fixed section,
preserving its existing PR link and wording.

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[cursor]

Additional Ask LLM E2E validation completed on the Sourcebot Cursor environment.

• ANTHROPIC_API_KEY was confirmed present without exposing its value.
• Added a local-only Anthropic model configuration using claude-sonnet-4-5 and preserved the existing GitHub connection.
• Reloaded /chat; the model selector showed Claude Sonnet 4.5 and the no-model error banner disappeared.
• Submitted Where is the configuration loaded in the Sourcebot repository? against the indexed Sourcebot repository.
• Ask streamed and completed a substantive, non-error response with code citations.
• The Ask questions about: label and suggestion pills remained absent.
• No repository files or committed configuration were changed.

Ask model visible with suggestions removed
Completed Ask response with code citations
ask_llm_response_and_suggestions_removed_e2e.mp4

[cursor]

Mode-specific Ask GH/public-state E2E follow-up:

Code investigation:

• Before this change, ExampleQuestionBadges was rendered unconditionally by the generic ChatLandingPage used by /chat (and the Ask home view).
• It was not gated inside the component by auth, entitlement, or EXPERIMENT_ASK_GH_ENABLED.
• The separate /askgh/:owner/:repo landing page uses a different component and did not render this suggestions row.

Repro state used on this VM:

• Restarted the dev stack with EXPERIMENT_ASK_GH_ENABLED=true and FORCE_ENABLE_ANONYMOUS_ACCESS=true.
• Kept the authenticated test session for the query because the Ask GH login wall intentionally blocks anonymous submission; the landing page itself was verified in the public Ask GH-style configuration at /chat.
• Runtime config.json contained the existing github-public connection plus an Anthropic claude-sonnet-4-5 model using ANTHROPIC_API_KEY.

E2E results:

• Claude Sonnet 4.5 was visible in the model selector.
• The /chat landing state showed the Ask input, repository scope, model selector, and Ask control, with no Ask questions about: label or suggestion pills.
• Submitted Where is the configuration loaded in the Sourcebot repository? against the indexed Sourcebot repository.
• The response streamed and completed successfully with substantive content and code citations.
• The suggestions remained absent in the completed chat composer.

Public Ask GH-style landing state with no suggestions
Completed Ask response in public Ask GH-style configuration
Completed chat composer with no suggestions
ask_gh_public_mode_llm_e2e_suggestions_removed.mp4

[cursor]

Fixed the changelog placement in commit abc79fa3: the Ask suggestions entry now lives under [Unreleased] → ### Fixed and was removed from the released [5.1.14] section. git diff --check passes.

[msukkari]

Updating branch onto main after #1675 merge conflict.