Add anti-synergy warnings: CLASHES pairs and per-joker CAUTIONS

Warning-only data in synergies.lua — never touches the synergy score.
Tooltips gain a red 'Clashes - <owned joker>: <why>' line when a hovered
joker fights one you own (Ride the Bus + Pareidolia, Vampire vs Steel
Joker/Lucky Cat, Smeared vs Flower Pot), and a 'Caution:' line in the
buy area for jokers that harm a board you keep (Ceremonial Dagger,
Madness, Stencil). Learning mode keeps warnings — they teach.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

main.lua

@@ -36,6 +36,13 @@ for _, p in ipairs(data.pairs) do
     JCA.pair_blurb[pair_key(p[1], p[2])] = p[3]
 end
 
+-- Known traps: warning-only, never part of the synergy score.
+JCA.clash_blurb = {}
+for _, p in ipairs(data.clashes or {}) do
+    JCA.clash_blurb[pair_key(p[1], p[2])] = p[3]
+end
+JCA.cautions = data.cautions or {}
+
 -- Scoring -------------------------------------------------------------------
 
 -- Synergy score between two joker center keys. 0 = no known synergy.
@@ -205,6 +212,7 @@ end
 local function tooltip_rows(card)
     -- Touch mode enlarges every advice row for phone screens (see config.lua).
     local S = JCA.config.touch_mode and 1.4 or 1
+    local key = card.config.center.key
     local partners, total = JCA.partners_for(card)
 
     local rows = {}
@@ -239,7 +247,6 @@ local function tooltip_rows(card)
         else
             text_row('Active combos with:')
         end
-        local key = card.config.center.key
         local shown = math.min(3, #partners)
         for i = 1, shown do
             local p = partners[i]
@@ -263,6 +270,26 @@ local function tooltip_rows(card)
             text_row('Strong pick for this build!', G.C.GREEN)
         end
     end
+    -- Anti-synergy warnings: known traps against the board you keep. These
+    -- never touch the score (learning mode keeps them too — they teach).
+    if G.jokers and G.jokers.cards then
+        for _, owned in ipairs(G.jokers.cards) do
+            if owned ~= card and owned.config.center.set == 'Joker' then
+                local warn = JCA.clash_blurb[pair_key(key, owned.config.center.key)]
+                if warn then
+                    rows[#rows + 1] = {
+                        {n = G.UIT.T, config = {
+                            text = 'Clashes - ' .. name_of(owned.config.center.key) .. ': ',
+                            colour = G.C.RED, scale = 0.3 * S}},
+                        {n = G.UIT.T, config = {text = warn,
+                            colour = G.C.UI.TEXT_DARK, scale = 0.3 * S}},
+                    }
+                end
+            end
+        end
+    end
+    local caution = in_buy_area(card) and JCA.cautions[key]
+    if caution then text_row('Caution: ' .. caution, G.C.RED) end
     rows.name = 'Combo Advisor'
     return rows
 end