fix(places): OR-match multi-value categories in find_nearby_places

[asem89]

Problem

find_nearby_places returns {"places":[]} for any category that maps to multiple OSM tag values — which includes most of the common ones (restaurant, cafe, healthcare, finance, transport, ...). It reproduces everywhere, including dense city centers, so the tool effectively can't find restaurants at all.

Root cause

The handler builds the Overpass query by calling WithTag(key, value) once per value:

for key, values := range osmTags {
    for _, value := range values {
        queryBuilder.WithTag(key, value)
    }
}

Each WithTag appends a separate tag filter, and buildElementFilter concatenates them, so they are AND-ed:

node(around:2000,...)[amenity=restaurant][amenity=cafe][amenity=fast_food][amenity=bar][amenity=pub][amenity=food_court];

No single element can have amenity equal to six values at once, so the result set is always empty.

Fix

Pass all values for a key in one variadic WithTag(key, values...) call. The builder's existing multi-value path then emits the intended OR-regex — and this matches the usage example already documented in pkg/core/overpass.go (WithTag("amenity", "restaurant", "cafe")):

node(around:2000,...)[amenity~"restaurant|cafe|fast_food|bar|pub|food_court"];

Verification (manual, against live Overpass via the MCP server)

find_nearby_places{category:"restaurant"}:

Location	Before	After
Gdańsk old town (54.3486, 18.6536, r=800)	0	6 (Hard Rock Cafe, Piwnica Rajców, …)
Gdańsk / Stogi (54.3629, 18.7083, r=3000)	0	6 (Bar Caira, ControlFood, …)

Single-value categories (e.g. pharmacy) were unaffected before and after.

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

OR categories across tag keys as well

When the requested category maps to more than one OSM key, this still appends every key to the same global tag set, and OverpassBuilder.buildElementFilter concatenates those filters into one selector (pkg/core/overpass.go:218-220). For example category:"cafe" now emits filters like [amenity~"cafe|ice_cream"][shop~"coffee|tea"], requiring an element to have both tags, while mapCategoryToOSMTags defines those keys as alternatives (pkg/tools/places.go:258-262); the same applies to park, pharmacy, transport, and unknown multi-word categories, so those searches remain empty or severely underreported unless an object happens to carry all tag families.

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