fix(web): show truncated query on collapsed session search

[heavygee]

Summary

After the session search collapsed into the sidebar toolbar (3f73a5f6e), an active text filter left only the search icon + indicator dot. Operators could see that a filter was active, but not for what.

This change renders a compact chip when collapsed with a text query:

• Search icon + truncated query (truncate / ellipsis, max-w-[9rem])
• Active highlight via --app-chat-user-chip-bg / --app-chat-user-chip-fg so the chip still reads as active when text truncates away at small widths
• Click still expands to the full input
• Keeps the standalone date-filter control from fix(web): keep session date filter directly accessible #1367

Test plan

• Vitest: collapsed control shows query text + chip token classes
• Vitest: expand / filter / blur still collapses and keeps filtering
• bun run typecheck (web)
• Hard-reload sessions sidebar: type a query (e.g. jellybot), blur — blue chip shows truncated text
• Narrow the sidebar until text ellipsizes — blue wash still visible
• Date-only filter (no text): standalone calendar control unchanged

Issues

Fixes #1356

[heavygee]

Dogfood proof on live soup: collapsed SessionListSearch shows truncated query with chat-user chip colors.

_{asset: heavygee/hapi@pr-attach-proof-1391/proof-2026-08-06T04-42-58-1356-soup-blue-chip-header.png · delete release after merge if desired}

[heavygee]

Proof (pr-attach-proof, release strategy — not user-attachments)

_{asset: heavygee/hapi@pr-attach-proof-1391/proof-2026-08-06T04-43-02-1356-soup-blue-chip.png · delete release after merge if desired}

[github-actions]

Findings

• None.

Summary

• Review mode: initial
• No issues found in the added/modified lines. Residual risk: the real narrow-sidebar ellipsis/layout behavior is covered only by the PR’s manual test plan; the added jsdom test verifies text and classes, not rendered truncation.

Testing

• Not run (automation)

HAPI Bot